v3.10.0.1

Long-Term Debt - 6% Senior Notes Due October 2022 (Details) - Senior Notes - USD ($)	1 Months Ended
	Apr. 30, 2014	Dec. 31, 2018	Dec. 31, 2017
Long-Term Debt
Unamortized discount		$ 4,600,000
6% senior notes due October 2022
Long-Term Debt
Interest rate (as a percent)	6.00%	6.00%
Principal amount	$ 350,000,000.0
Unamortized discount	$ 5,700,000	$ 2,766,000	$ 3,441,000
Effective interest rate	6.25%
6% senior notes due October 2022 \| Debt Instrument, Redemption, Period One
Long-Term Debt
Redemption price, percentage	103.00%
6% senior notes due October 2022 \| Debt Instrument, Redemption, Period Two
Long-Term Debt
Redemption price, percentage	101.50%
6% senior notes due October 2022 \| Debt Instrument, Redemption, Period Three
Long-Term Debt
Redemption price, percentage	100.00%

Face (par) amount of debt instrument at time of issuance.

+ References

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

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- Definition

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

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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.

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- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

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Amount, after accumulated amortization, of debt discount.

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