Operating Lease Right-of-Use Assets and Liabilities - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	$ 20,746	$ 131,305
Cash paid for amounts included in the measurement of lease liabilities - operating	$ 34,725	$ 33,231