Leases - Restated (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018
Lessee, Lease, Description [Line Items]
Total assets	$ 1,258,324	$ 1,526,742	$ 1,663,521	$ 1,689,199		$ 1,627,823	$ 1,649,757	$ 1,715,429	$ 1,652,053
Total current liabilities	465,981	452,166	486,811	464,914		479,325	415,835	474,108	384,608
Total long-term liabilities	$ 2,001,365	1,967,856	1,972,534	1,956,663		1,869,082	1,800,443	1,835,159	1,739,478
Adjustment
Lessee, Lease, Description [Line Items]
Total assets		(14,765)	(15,729)	(13,690)		(11,959)	(12,589)	(13,472)	(13,882)
Total current liabilities		50,853	51,936	47,292		46,603	42,387	45,154	35,953
Total long-term liabilities		$ 53,038	$ 54,213	$ 49,510		48,294	$ 44,898	$ 44,150	$ 38,412
ASU 2016-02
Lessee, Lease, Description [Line Items]
ASU adoption, prior periods not restated	true
Total assets					$ 1,732,037	1,627,823
Total current liabilities					505,010	479,325
Total long-term liabilities					1,468,785	$ 1,389,757
ASU 2016-02 | Adjustment
Lessee, Lease, Description [Line Items]
Total assets					104,214
Total current liabilities					25,685
Total long-term liabilities					$ 79,028