Leases - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Jun. 01, 2020
Lessee, Lease, Description [Line Items]
Operating lease liability, statement of financial position [Extensible List]	Accrued expenses and other liabilities	Accrued expenses and other liabilities
Operating lease right-of-use asset, statement of financial position [Extensible List]	Other assets	Other assets
Operating lease liabilities	$ 79,441	$ 85,556
Operating lease right of use assets	70,417	76,090
Rental income	$ 175	$ 178	$ 25
Opus Bank
Lessee, Lease, Description [Line Items]
Operating lease liabilities				$ 43,300
Operating lease right of use assets				42,400
Unfavorable lease liability adjustments				$ 900