Leases (Maturities of Operating Lease Liabilities) (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Leases [Abstract]
Remainder of 2019	$ 35,090
2020	44,031
2021	40,185
2022	34,640
2023	31,141
Thereafter	76,480
Total undiscounted future minimum lease payments	261,567
Less: Discount impact	(46,559)
Total lease liability	$ 215,008