Leases - Cash Flow and Supplemental Noncash Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash payments for operating leases	$ 10,819	$ 11,200
Operating cash payments for finance leases	1,982	1,535
Financing cash payments for finance leases	3,626	7,826
Lease liabilities arising from obtaining right-of-use assets:
Operating leases	0	623
Finance leases	$ 0	$ 5,901