Lease Commitments - Supplemental Cash Flow (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	[1]	Jan. 01, 2019
Leases [Abstract]
Operating cash flows for operating leases	$ 9,495	$ 9,596
Right-of-use assets obtained in exchange for lease obligations	16,173	$ 4,220
Operating lease right-of-use assets, net	$ 108,974		$ 102,354		$ 122,300

[1] Derived from the audited Consolidated Balance Sheet