Leases - Supplemental Cash Flow Information Related to Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash Payments on Lease Obligations
Operating cash flows used for operating leases	$ 1,875	$ 1,632
Changes in operating assets and liabilities:
Changes in operating lease right-of-use assets	897	841
Changes in operating lease obligations	(1,158)	(860)
Operating lease right-of-use assets and liabilities	$ (261)	(19)
Right-Of-Use Assets Obtained in Exchange for Lease Obligations
Operating leases		$ 45,677