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Income Taxes - Reconciliation of the Statutory Federal Tax Provision to Income Tax (Benefit) Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Statutory federal tax provision (1)	$ 19,089	$ 35,729	$ 44,518
Tax impact of REIT election	(14,439)	(22,277)	(31,101)
State income tax provision, net of federal tax benefit	705	1,652	1,703
Foreign income tax benefit	(2,927)	(430)	(3,080)
Tax reform impact on U.S. taxes	0	(2,143)	0
Tax reform impact on foreign taxes	0	(2,076)	0
Other	673	(248)	359
Income tax provision	$ 3,101	$ 10,207	$ 12,399
Statutory federal tax provision (as a percent)	35.00%	35.00%	35.00%

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