Leases - Lease Cost Information (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Leases [Abstract]
Cash paid for amounts included in the measurement of lease liabilities	$ 4,222	$ 11,268
Right-of-use assets obtained in exchange for lease obligations	$ 2,188	$ 3,330