Qualitative Analysis Of Market Related Data, Average Basis, CARES Act

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Amount of gain (loss) on sale of financing receivable.

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Significant Accounting Policies (Details) - USD ($)		1 Months Ended	9 Months Ended
Significant Accounting Policies (Details) - USD ($)	Jun. 01, 2020	Jul. 31, 2020	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Goodwill			$ 898,434,000	$ 808,322,000	$ 898,434,000	$ 808,322,000	$ 808,726,000
Proceeds from loans held for sale previously classified as portfolio loans			1,283,214,000	$ 76,579,000
Loans held for investment			13,450,840,000			8,722,311,000
Initial ACL Recorded for PCD Loans			21,242,000
Opus Bank
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Goodwill	$ 90,112,000
Purchase price (initial fair value)	841,234,000
Initial ACL Recorded for PCD Loans	21,200,000
Commercial loans
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Loans held for investment			2,353,723,000			$ 1,975,053,000
Commercial loans \| Opus Bank
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Purchase price (initial fair value)	$ 54,687,000
Commercial loans \| SBA PPP
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Proceeds from loans held for sale previously classified as portfolio loans		$ 1,130,000,000
Gain (loss) on sale of SBA PPP loan portfolio		$ 18,900,000
Loans held for investment			$ 0		$ 1,130,000,000
Min
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Qualitative analysis of market related data, average basis, CARES Act			15 days
Weighted average useful life			6 years
Max
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Qualitative analysis of market related data, average basis, CARES Act			30 days
Weighted average useful life			11 years