Commitments and Contingencies, Rent (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019		Dec. 31, 2018	Dec. 31, 2017
Rent [Abstract]
Total rent expense	$ 11,382	[1]	$ 12,605	$ 11,954
Expenses related to non lease components	2,400
Real Estate [Member]
Rent [Abstract]
Total rent expense	7,909	[1]	9,272	8,983
Other [Member]
Rent [Abstract]
Total rent expense	$ 3,473	[1]	$ 3,333	$ 2,971

[1] Includes expenses of approximately $2.4 million related to non-lease components such as maintenance, property taxes, etc., and operating lease expense for leases with an initial term of 12 months or less, which is not material.