Leases (Narrative) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jan. 01, 2019
Lease renewal term	1 year
Operating lease liability	$ 24,584
Operating lease asset	23,395
Minimum operating lease payments of lessee that has not yet commenced	500
Cash paid for leases expenses	3,400
Right-of-use assets in exchange for new operating lease liabilities	$ 1,100
Accounting Standards Update 2016-02 [Member]
Operating lease liability		$ 26,500
Operating lease asset		$ 25,600