Leases (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2019
Leases [Abstract]
Rent expense		$ 24,200
Remaining lease term	7 years
Discount rate	5.20%
Operating lease right-of-use assets	$ 104,179	98,774	$ 66,400
Right-of-use asset obtained in exchange for operating lease	31,400	50,500
Operating lease right-of-use assets	13,200	$ 34,300
Operating lease payments	$ 21,800