Debt - Current Year Activity (Details) - USD ($) $ in Thousands			3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 13, 2025	Feb. 20, 2025	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024	Apr. 15, 2025
Debt Instrument [Line Items]
Debt Instrument, Unused Borrowing Capacity, Amount			$ 945,800		$ 945,800
Debt Instrument, Covenant Compliance					The Company was in compliance with all such applicable restrictions and financial and other covenants		The Company was in compliance with all such applicable restrictions and financial and other covenants
Net book value of properties that are collateral for debt arrangements			7,200		$ 7,200		$ 7,300
Long-term debt, gross			3,055,212		3,055,212		3,038,322
Unsecured Notes
Debt Instrument [Line Items]
Long-term debt, gross			1,975,000		1,975,000		1,600,000
Interest Expense [Member]
Debt Instrument [Line Items]
Amortization of deferred financing fees			1,337	$ 1,052	2,638	$ 2,036
Line of Credit Facility, Commitment Fee Amount			439	$ 439	874	$ 878
Accounts Payable and Accrued Liabilities [Member]
Debt Instrument [Line Items]
Interest payable			13,200		13,200		13,700
$100 Million Series D Unsecured Notes
Debt Instrument [Line Items]
Repayment of unsecured term loans		$ 100,000
$100 Million Series D Unsecured Notes \| Unsecured Notes
Debt Instrument [Line Items]
Long-term debt, gross			$ 0		$ 0		100,000
Stated interest rate			4.32%		4.32%
$75 Million Series G Unsecured Notes [Member]
Debt Instrument [Line Items]
Repayment of unsecured term loans	$ 75,000
$75 Million Series G Unsecured Notes [Member] \| Unsecured Notes
Debt Instrument [Line Items]
Long-term debt, gross			$ 0		$ 0		$ 75,000
Stated interest rate			4.10%		4.10%
$350 Million Unsecured Notes \| Unsecured Notes
Debt Instrument [Line Items]
Long-term debt, gross								$ 350,000
Stated interest rate								5.50%
$100 Million Unsecured Notes \| Unsecured Notes
Debt Instrument [Line Items]
Long-term debt, gross								$ 100,000
Stated interest rate								5.82%
$100 Million Unsecured Notes 4-15-25 \| Unsecured Notes
Debt Instrument [Line Items]
Long-term debt, gross								$ 100,000
Stated interest rate								5.99%

STAG Industrial, Inc. 10-Q