Leases - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Jun. 01, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Operating lease liability, statement of financial position [Extensible List]	us-gaap:AccruedLiabilitiesAndOtherLiabilities		us-gaap:AccruedLiabilitiesAndOtherLiabilities			us-gaap:AccruedLiabilitiesAndOtherLiabilities
Operating lease right-of-use asset, statement of financial position [Extensible List]	us-gaap:OtherAssets		us-gaap:OtherAssets			us-gaap:OtherAssets
Operating lease liabilities	$ 91,202		$ 91,202			$ 46,498
Operating lease right of use assets	81,150		81,150			$ 43,177
Rental income	$ 265	$ 25	$ 356	$ 116
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