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v3.22.1

FHLB Advances, Other Borrowings and Subordinated Notes (Narrative) (Details) $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended | 77 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2014 CAD ($) | Mar. 31, 2022 USD ($) building Rate | Jun. 30, 2019 USD ($) | Dec. 31, 2014 USD ($) | May 31, 2020 CAD ($) | Dec. 31, 2021 USD ($) | Dec. 23, 2021 USD ($) | Oct. 06, 2021 | Mar. 31, 2021 USD ($) | Mar. 31, 2020 USD ($) | Sep. 18, 2018 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Outstanding borrowings |  | $ 74,969,000 |  |  |  | $ 80,319,000 |  |  | $ 96,363,000 |  |
Other borrowings |  | 62,786,000 |  |  |  | 63,292,000 |  |  | 64,659,000 |  |
Secured borrowings |  | 328,889,000 |  |  |  | 341,327,000 |  |  | 343,439,000 |  |
Subordinated notes |  | 437,033,000 |  |  |  | 436,938,000 |  |  | 436,595,000 |  |
Collateral Pledged |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Pledged financial instruments |  | 47,400,000 |  |  |  |  |  |  |  |  |
Term Facility |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Outstanding borrowings |  |  |  |  |  |  |  |  |  |  | $ 150,000,000
Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Outstanding borrowings |  |  |  |  |  |  |  |  |  |  | $ 100,000,000
Amount outstanding |  | $ 0 |  |  |  |  |  |  |  |  |
Subordinated debt maturing June 2029 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Proceeds from the issuance of subordinated notes, net |  |  | $ 296,700,000 |  |  |  |  |  |  |  |
Base Rate Loan | Base Rate | Term Facility |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  | 0.75% |  |  |  |  |  |  |  |  |
Base Rate Loan | Base Rate | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  | 0.60% |  |  |  |  |  |  |  |  |
Base Rate Loan | Federal Funds Rate | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  | 0.50% |  |  |  |  |  |  |  |  |
Base Rate Loan | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  | 1.10% |  |  |  |  |  |  |  |  |
Base Rate Loan | Eurodollar rate | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  | 1.00% |  |  |  |  |  |  |  |  |
Eurodollar Rate Loan | London Interbank Offered Rate (LIBOR) | Term Facility |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  | 1.25% |  |  |  |  |  |  |  |  |
Eurodollar Rate Loan | London Interbank Offered Rate (LIBOR) | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  | 1.45% |  |  |  |  |  |  |  |  |
Line of Credit |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Increase to borrowing |  |  |  |  |  |  | $ 50,000,000 |  |  |  |
Borrowing capacity |  |  |  |  |  |  | $ 100,000,000 |  |  |  |
Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Commitment fee | Rate |  | 0.30% |  |  |  |  |  |  |  |  |
Securities sold under repurchase agreements | Overnight Sweep Collateral |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Securities sold under agreements to repurchase |  | $ 15,872,000 |  |  |  | 9,200,000 |  |  | 12,400,000 |  |
Pledged financial instruments |  | $ 47,358,000 |  |  |  |  |  |  |  |  |
Fixed Rate Promissory Note |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of properties securing debt | building |  | 3 |  |  |  |  |  |  |  |  |
Other borrowings |  | $ 62,800,000 |  |  |  | 63,300,000 |  |  | $ 64,700,000 |  |
Trust Preferred Securities |  |  |  |  |  |  |  |  |  | $ 66,400,000 |
Fixed interest rate |  |  |  |  |  |  |  | 1.70% | 1.70% | 3.00% |
Secured Debt |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Secured borrowings |  | 9,100,000 |  |  |  |  |  |  |  |  |
Secured Debt | Receivables Purchase Agreement |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Proceeds from debt issuance | $ 150 |  |  |  | $ 420 |  |  |  |  |  |
Secured borrowings |  | $ 319,800,000 |  |  |  | $ 332,200,000 |  |  | $ 334,100,000 |  |
Secured Debt | Canadian Commercial Paper Rate | Receivables Purchase Agreement |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  | 0.80% |  |  |  |  |  |  |  |  |
Subordinated Debt | Subordinated debt maturing June 2029 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Trust Preferred Securities |  |  | $ 300,000,000 |  |  |  |  |  |  |  |
Fixed interest rate |  |  | 4.85% |  |  |  |  |  |  |  |
Subordinated Debt | Subordinated debt maturing June 2024 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Trust Preferred Securities |  |  |  | $ 140,000,000 |  |  |  |  |  |  |
Fixed interest rate |  |  |  | 5.00% |  |  |  |  |  |  |
Proceeds from debt issuance |  |  |  | $ 139,100,000 |  |  |  |  |  |  |

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