Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows used in finance leases	$ 154	$ 127
Operating cash flows used in operating leases	10,369	10,739
Financing cash flows used in finance leases	3,545	1,203
Right-of-use assets obtained in exchange for new finance lease liabilities	1,541	733
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 0	$ 9,328