Commitments and Contingencies Commitments and Contingencies - Components of Lease Commitments Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Amortization of lease right-of-use assets	$ 7,874	$ 5,796
Short-term lease expense	561	1,079
Non-lease components (including taxes, insurance, common maintenance, etc.)	2,927	1,733
Total operating lease expense, excluding rent	$ 11,362	$ 8,608