Leases - Schedule of Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Leases [Abstract]
Operating Lease Cost	$ 6,300	$ 12,107
Finance Lease Cost
Amortization of Right-of-Use Assets	31	69
Interest on Lease Liabilities	1	3
Total Finance Lease Cost	32	72
Short-Term Lease Cost	109	225
Variable Lease Cost	719	1,293
Sublease Income	(913)	(1,823)
Total Lease Cost	$ 6,247	$ 11,874