Leases (Narrative) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Jan. 01, 2019
Lease renewal term	1 year
Operating lease liability	$ 23,542
Operating lease asset	22,372
Cash paid for leases expenses	5,200
Right-of-use assets in exchange for new operating lease liabilities	$ 1,700
Accounting Standards Update 2016-02 [Member]
Operating lease liability		$ 26,500
Operating lease asset		$ 25,600