Leases - Cash Flow (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash paid for amounts included in the measurement of liabilities
Financing cash flows from finance leases	$ 1,932	$ 2,167
Operating cash flows from finance leases	656	507
Operating cash flows from operating leases	103,270	99,713
Non-cash supplemental amounts
ROU assets obtained in exchange for new finance lease liabilities	3,476	963	$ 1,678
ROU assets obtained in exchange for new operating lease liabilities	22,529	79,382	0
ROU assets terminated in exchange for release from finance lease liabilities	0	0	0
ROU assets terminated in exchange for release from operating lease liabilities	$ 7,738	$ 193	$ 0