Lease Maturity Tables (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Operating Lease Liabilities, Payments Due [Abstract]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 24,405	$ 49,009
Operating Leases, Future Minimum Payments, Due in Two Years	40,624	38,620
Operating Leases, Future Minimum Payments, Due in Three Years	31,064	29,396
Operating Leases, Future Minimum Payments, Due in Four Years	22,311	21,767
Operating Leases, Future Minimum Payments, Due in Five Years	14,280	13,994
Operating Leases, Future Minimum Payments, Due Thereafter	43,060	42,087
Operating Leases, Future Minimum Payments Due	175,744	194,873
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(16,630)
Lessee, Operating Lease, Liability, Payments, Due	159,114
Finance Lease Liabilities, Payments, Due [Abstract]
Capital Leases, Future Minimum Payments Due, Next Twelve Months	1,020	1,802
Capital Leases, Future Minimum Payments Due in Two Years	2,009	1,748
Capital Leases, Future Minimum Payments Due in Three Years	1,897	1,687
Capital Leases, Future Minimum Payments Due in Four Years	1,629	1,392
Capital Leases, Future Minimum Payments Due in Five Years	1,209	952
Capital Leases, Future Minimum Payments Due Thereafter	4,058	3,802
Capital Leases, Future Minimum Payments Due	11,822	$ 11,383
Finance Lease, Liability, Undiscounted Excess Amount	1,893
Finance Lease, Liability, Payments, Due	$ 9,929