Leases - Costs and Supplemental Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Leases [Abstract]
Operating lease expense	$ 18,852
Variable lease expense	2,924
Sublease income	(791)
Total lease expense	20,985
ROU assets	102,779
Lease liabilities	$ 109,608
Weighted average remaining lease term	8 years 1 month 6 days
Weighted average discount rate	3.05%
Cash paid for amounts included in the measurement of lease liabilities	$ 18,563
ROU assets obtained in exchange for lease obligations	$ 117,496