Leases - Supplemental Cash Flows (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 4,141	$ 4,110
Operating cash flows from finance leases	17	24
Financing cash flows from finance leases	160	187
ROU assets obtained in exchange for lease obligations:
Operating leases	$ 424	$ 5,916