Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Leases, Operating [Abstract]
Operating Lease, Payments	$ 12,311
Operating Lease, Weighted Average Remaining Lease Term	5 years 8 months 23 days
Operating Lease, Weighted Average Discount Rate, Percent	381.00%
Operating Lease, Cost	$ 12,088
Operating Lease, Right-of-Use Asset	174,580	$ 178,304	$ 0
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	33,577		48,292
Lessee, Operating Lease, Liability, Payments, Due Year Two	44,573		43,517
Lessee, Operating Lease, Liability, Payments, Due Year Three	36,998		34,836
Lessee, Operating Lease, Liability, Payments, Due Year Four	29,940		27,035
Lessee, Operating Lease, Liability, Payments, Due Year Five	23,184		19,981
Finance Lease, Liability, Payments, Due after Year Five	55,084		36,349
Lessee, Operating Lease, Liability, Payments, Due	223,356
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	24,518
Operating Lease, Liability	198,838		210,010
Operating Lease, Liability, Current	39,015
Operating Lease, Liability, Noncurrent	159,823	$ 161,464	$ 0
Variable Lease, Cost	713
Lease, Cost	12,801
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 2,439