Lease Commitments - Supplemental Cash Flow (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Jan. 01, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases	$ 38,906
Right-of-use assets obtained in exchange for lease obligations	30,056
Operating lease right-of-use asset, net	$ 102,354	$ 122,300