Leases (Narrative) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	Jan. 01, 2019
Leased right-of-use assets	$ 33,891	$ 37,040
Operating lease liability	36,155	47,177
Cumulative-effect adjustment on retained earnings	$ (1,794)	$ 56,669
Accounting Standards Update 2016-02 [Member]
Leased right-of-use assets			$ 38,300
Operating lease liability			40,400
Cumulative-effect adjustment on retained earnings			$ 300
Minimum [Member]
Lease term	1 month
Maximum [Member]
Lease term	20 years