Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Leases
Options to extend the leases	true
Options to terminate	true
Termination term	1 year
Current lease commitment liabilities	$ 5,664
Noncurrent lease commitment liabilities	10,088
Right-of-use asset	13,683
Operating lease cost	$ 6,000	$ 6,800	$ 7,200
Minimum
Leases
Remaining lease terms (in years)	1 year
Maximum
Leases
Remaining lease terms (in years)	7 years
Renewal term	5 years