Leases - Components of Total Lease Cost (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Leases [Abstract]
Amortization of ROU assets	$ 291
Interest on lease liabilities	191
Operating lease cost	34,175
Short-term lease cost	410
Variable lease cost	3,573
Sublease income	(3,422)
Total lease cost (included in net occupancy and equipment expense)	$ 35,218