Leases (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Jan. 01, 2019
Operating lease liability	$ 25,263
Operating lease asset	24,031
Cash paid for leases expenses	$ 1,700
Accounting Standards Update 2016-02 [Member]
Operating lease liability		$ 26,500
Operating lease asset		$ 25,600
Minimum [Member]
Lease renewal term	1 year