Commitments and Contingencies (Undiscounted Future Lease Payments) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Rental expense for operating leases	$ 3,300	$ 3,200	$ 6,800	$ 6,100
Undiscounted future lease payments
2020 (remaining six months for June 30, 2020)	3,593		3,593		$ 7,787
2021	6,707		6,707		6,530
2022	3,959		3,959		3,746
2023	2,110		2,110		1,925
2024	1,336		1,336		1,148
Thereafter	1,196		1,196		864
Total undiscounted lease payments	18,901		18,901		22,000
Less: present value adjustment	(1,980)		(1,980)		(2,533)
Total operating lease liability	$ 16,921		$ 16,921		$ 19,467