Lease Maturity Tables (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Operating Lease Liabilities, Payments Due [Abstract]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 37,090	$ 49,009
Operating Leases, Future Minimum Payments, Due in Two Years	39,237	38,620
Operating Leases, Future Minimum Payments, Due in Three Years	29,666	29,396
Operating Leases, Future Minimum Payments, Due in Four Years	21,329	21,767
Operating Leases, Future Minimum Payments, Due in Five Years	13,544	13,994
Operating Leases, Future Minimum Payments, Due Thereafter	42,182	42,087
Operating Leases, Future Minimum Payments Due	183,048	194,873
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(21,018)
Lessee, Operating Lease, Liability, Payments, Due	162,030
Finance Lease Liabilities, Payments, Due [Abstract]
Capital Leases, Future Minimum Payments Due, Next Twelve Months	1,425	1,802
Capital Leases, Future Minimum Payments Due in Two Years	1,881	1,748
Capital Leases, Future Minimum Payments Due in Three Years	1,793	1,687
Capital Leases, Future Minimum Payments Due in Four Years	1,608	1,392
Capital Leases, Future Minimum Payments Due in Five Years	1,204	952
Capital Leases, Future Minimum Payments Due Thereafter	4,040	3,802
Capital Leases, Future Minimum Payments Due	11,951	$ 11,383
Finance Lease, Liability, Undiscounted Excess Amount	2,075
Finance Lease, Liability, Payments, Due	$ 9,876