Leases - Cash Flow (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash paid for amounts included in the measurement of liabilities
Financing cash flows from finance leases	$ 1,508	$ 1,571
Operating cash flows from finance leases	493	559
Operating cash flows from operating leases	76,536	71,181
Non-cash supplemental amounts
ROU assets obtained in exchange for new finance lease liabilities	1,992	198
ROU assets obtained in exchange for new operating lease liabilities	11,974	15,532
ROU assets terminated in exchange for release from operating lease liabilities	$ 7,738	$ 193