Leases - Components of Lease Expense, Weighted-Average Remaining Lease Term and Discount Rate and Other Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Lease cost:
Operating lease cost	$ 1,637	$ 1,570	$ 3,223	$ 2,903
Short-term lease cost	390	930	899	1,885
Sublease income	(39)	(39)	(79)	(52)
Total lease cost	$ 1,988	$ 2,461	4,043	4,736
Operating cash flows for operating leases			3,294	2,966
Right-of-use lease assets obtained in exchange for lease obligations, Operating leases			$ 5,477	3,004
Gain on sale and leaseback transactions, net				$ 207
Weighted Average Remaining Lease Term, Operating leases	6 years 8 months 12 days	4 years 8 months 12 days	6 years 8 months 12 days	4 years 8 months 12 days
Weighted Average Discount Rate, Operating leases	5.08%	5.40%	5.08%	5.40%