Leases (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2019
Leases [Abstract]
Lease term	12 years
Rent expense		$ 24,200	$ 15,200
Remaining lease term	6 years 7 months 6 days
Discount rate	5.50%
Operating lease right-of-use assets	$ 98,774	$ 0		$ 66,400
Right-of-use asset obtained in exchange for operating lease	50,500
Operating lease right-of-use assets	34,300
Operating lease payments	$ 21,800