Leases (Future Minimum Lease Payments) (Details) - USD ($) $ in Thousands		Mar. 31, 2019	Jan. 01, 2019
Operating Leases
2019	[1]	$ 23,676
2020		25,747
2021		23,097
2022		19,405
2023		16,054
Thereafter		34,909
Total lease payments		142,888
Less: Interest		(27,688)
Present value of lease liabilities		115,200	$ 115,000
Finance Leases
2019	[1]	5,335
2020		5,578
2021		2,356
2022		873
2023		660
Thereafter		0
Total lease payments		14,802
Less: Interest		(1,004)
Present value of lease liabilities		13,798
2019	[1]	29,011
2020		31,325
2021		25,453
2022		20,278
2023		16,714
Thereafter		34,909
Total lease payments		157,690
Less: Interest		(28,692)
Present value of lease liabilities		$ 128,998

[1] Excludes the three months ended March 31, 2019.