Leases (Schedule of Supplemental Cash Flow Information Related to Leases) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Lessee Disclosure [Abstract]
Operating cash flows from operating leases	$ 974		$ 3,350
Operating cash flows from finance leases	388		1,181
Financing cash flows from finance leases	298		876
Right-of-use assets obtained in exchange for operating lease obligations	988		3,990
Right-of-use assets obtained in exchange for finance lease obligations