Leases - Other Information (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2019
Leases [Abstract]
Cash paid for amounts included in the measurement of operating lease liabilities		$ 7,477
Right-of-use assets obtained in exchange for new operating lease liabilities		1,229
Operating lease expense		6,592
Short-term lease expense		8,042
Variable and other lease costs		$ 2,446
Right of use impairment charge	$ 1,200