Leases (Summary of Lease Liability Maturities) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Operating Lease
Remainder of 2019	$ 7,424
2020	30,611
2021	21,412
2022	13,400
2023	7,914
Thereafter	24,901
Total lease payments	105,662
Less: Imputed interest	(24,481)
Total lease obligations	81,181
Less: Current portion	(24,835)	$ 0
Total long-term lease obligations	56,346	0
Finance Leases
Remainder of 2019	659
2020	2,645
2021	2,670
2022	2,367
2023	6,997
Thereafter	13,723
Total lease payments	29,061
Less: Imputed interest	(6,487)
Total lease obligations	22,574	$ 23,386
Less: Current portion	(1,369)
Total long-term lease obligations	$ 21,205