Leases - Cash Flow and Supplemental Noncash Information (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 payments for operating leases	$ 7,125	$ 7,458
Operating cash payments for finance leases	1,493	942
Financing cash payments for finance leases	2,393	6,656
Lease liabilities arising from obtaining right-of-use assets:
Operating leases	0	623
Finance leases	$ 0	$ 6,045