XML 244 R129.htm IDEA: XBRL DOCUMENT v3.21.2
Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Securities available for sale $ 6,193,706 $ 5,844,909 [1] $ 5,885,887 [2]
Total equity securities 15,801 31,576 32,830
Total securities 6,193,706 5,844,909 5,885,887
Asset-backed Securities      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Securities available for sale [3]   527,099 373,254
Mutual Funds and Common Stock      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Securities available for sale [4]     17,416
Mutual Funds      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Securities available for sale 15,801 16,083  
Fair Value, Measurements, Recurring      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Securities available for sale 6,177,905 5,813,333 5,853,057
Total equity securities 15,801 31,576 32,830
Total securities 6,193,706 5,844,909 5,885,887
Fair Value, Measurements, Recurring | Preferred Stock      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total equity securities   15,493 15,414
Fair Value, Measurements, Recurring | Mutual Funds and Common Stock      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total equity securities   16,083 17,416
Fair Value, Measurements, Recurring | Mutual Funds      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total equity securities 15,801 16,083  
Fair Value, Measurements, Recurring | Mortgage-Related Securities      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Securities available for sale 3,195,588 3,038,325 3,353,735
Fair Value, Measurements, Recurring | Mortgage-Related Securities | GSE Certificates      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Securities available for sale 1,209,318 1,209,610 1,552,623
Fair Value, Measurements, Recurring | Mortgage-Related Securities | GSE CMOs      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Securities available for sale 1,986,270 1,828,715 1,801,112
Fair Value, Measurements, Recurring | Other Securities      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Securities available for sale 2,982,317 2,775,008 2,499,322
Fair Value, Measurements, Recurring | Other Securities | U. S. Treasury Obligations      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Securities available for sale 64,998 64,985 41,839
Fair Value, Measurements, Recurring | Other Securities | GSE Debentures      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Securities available for sale 1,368,341 1,158,302 1,094,240
Fair Value, Measurements, Recurring | Other Securities | Asset-backed Securities      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Securities available for sale 520,773 527,099 373,254
Fair Value, Measurements, Recurring | Other Securities | Municipal Bonds      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Securities available for sale 26,011 26,311 26,892
Fair Value, Measurements, Recurring | Other Securities | Corporate Bonds      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Securities available for sale 882,070 882,226 867,182
Fair Value, Measurements, Recurring | Other Securities | Foreign Notes      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Securities available for sale 25,993 25,538  
Fair Value, Measurements, Recurring | Other Securities | Capital Trust Notes      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Securities available for sale 94,131 90,547 95,915
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Securities available for sale 64,998 64,985 41,839
Total equity securities   15,493 15,414
Total securities 64,998 80,478 57,253
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Preferred Stock      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total equity securities   15,493 15,414
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Mutual Funds and Common Stock      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total equity securities     17,416
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other Securities      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Securities available for sale 64,998 64,985 41,839
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other Securities | U. S. Treasury Obligations      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Securities available for sale 64,998 64,985 41,839
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Securities available for sale 6,112,907 5,748,348 5,811,218
Total equity securities 15,801 16,083 17,416
Total securities 6,128,708 5,764,431 5,828,634
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Mutual Funds and Common Stock      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total equity securities   16,083  
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Mutual Funds      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Total equity securities 15,801 16,083  
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Mortgage-Related Securities      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Securities available for sale 3,195,588 3,038,325 3,353,735
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Mortgage-Related Securities | GSE Certificates      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Securities available for sale 1,209,318 1,209,610 1,552,623
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Mortgage-Related Securities | GSE CMOs      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Securities available for sale 1,986,270 1,828,715 1,801,112
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Other Securities      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Securities available for sale 2,917,319 2,710,023 2,457,483
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Other Securities | GSE Debentures      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Securities available for sale 1,368,341 1,158,302 1,094,240
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Other Securities | Asset-backed Securities      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Securities available for sale 520,773 527,099 373,254
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Other Securities | Municipal Bonds      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Securities available for sale 26,011 26,311 26,892
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Other Securities | Corporate Bonds      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Securities available for sale 882,070 882,226 867,182
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Other Securities | Foreign Notes      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Securities available for sale 25,993 25,538  
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Other Securities | Capital Trust Notes      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Securities available for sale $ 94,131 $ 90,547 $ 95,915
[1] Excludes accrued interest receivable of $14.9 million included in other assets in the Consolidated Statements of Condition.
[2] Excludes accrued interest receivable of $24.4 million included in other assets in the Consolidated Statements of Condition.
[3] The underlying assets of the asset-backed securities are substantially guaranteed by the U.S. Government.
[4] Primarily consists of mutual funds that are CRA-qualified investments.