Leases Leases (Cash paid for Lease Liabilities and ROU Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Leases [Abstract]
Operating cash flows from operating leases	$ 32,518
Operating cash flows from finance leases	608
Financing cash flows from finance leases	6,697	$ 7,759	$ 9,926
ROU assets obtained in exchange for lease obligations: Operating	56,318
ROU assets obtained in exchange for lease obligations: Finance	$ 3,727