v3.10.0.1

Debt - Additional Information (Details)	6 Months Ended
Debt - Additional Information (Details)	Jun. 30, 2018 USD ($)
Financial Guarantee of Nexstar 5.625% Senior Unsecured Notes Due 2024 [Member]
Debt Instrument [Line Items]
Maximum guarantee exposure	$ 900,000,000.0
Interest rate	5.625%
Current exposure under the guarantee	$ 887,300,000
Guarantee of Nexstar 6.125% Notes Due 2022 [Member]
Debt Instrument [Line Items]
Maximum guarantee exposure	$ 275,000,000.0
Interest rate	6.125%
Current exposure under the guarantee	$ 273,200,000
Guarantee of Nexstar Senior Secured Credit Facility [Member]
Debt Instrument [Line Items]
Maximum guarantee exposure	2,589,000,000
Guarantee of Nexstar Senior Secured Credit Facility Term Loan B [Member]
Debt Instrument [Line Items]
Current exposure under the guarantee	1,727,000,000
Guarantee of Nexstar Senior Secured Credit Facility Term Loan A [Member]
Debt Instrument [Line Items]
Current exposure under the guarantee	693,400,000
Revolving Loans [Member]
Debt Instrument [Line Items]
Available borrowing capacity	3,000,000.0
Term Loans [Member] \| Notes Payable to Banks [Member]
Debt Instrument [Line Items]
Payment of contractual maturities under term loan B	$ 1,200,000

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Balance Type:	na
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Amount of the required periodic payments applied to principal.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=115931803&loc=d3e12069-110248

+ Details

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Namespace Prefix:	us-gaap_
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Period Type:	instant

- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=115931803&loc=d3e12069-110248

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Namespace Prefix:	us-gaap_
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Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Period Type:	instant

- Details

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- Details

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- Details

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- Details

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MISSION BROADCASTING INC 10-Q