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Securities Available for sale, Unrealized Loss Position, Fair Value (Details) $ in Thousands | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
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Available for sale, Unrealized Loss Position [Line Items] |  |
Available for sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | 462 | 77
Available for sale, Securities in Unrealized Loss Position, Less than 12 Months [Abstract] |  |
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value | $ 4,911,358 | $ 1,143,562
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value | 1,476,208 | 438,846
Available for sale securities, Unrealized Loss Position, Fair Value | 6,387,566 | 1,582,408
Available for sale securities, Securities in Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 80,372 | 8,197
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 33,608 | 642
Available for sale securities, Unrealized Loss Position, Accumulated Loss | 113,980 | $ 8,839
Debt Securities, Available-for-sale, Allowance for Credit Loss | $ 0 |
U.S. Treasury [Member] |  |
Available for sale, Unrealized Loss Position [Line Items] |  |
Available for sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | 1 |
Available for sale, Securities in Unrealized Loss Position, Less than 12 Months [Abstract] |  |
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value | $ 1,000 |
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value | 0 |
Available for sale securities, Unrealized Loss Position, Fair Value | 1,000 |
Available for sale securities, Securities in Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 1 |
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 0 |
Available for sale securities, Unrealized Loss Position, Accumulated Loss | $ 1 |
Municipal securities [Member] |  |
Available for sale, Unrealized Loss Position [Line Items] |  |
Available for sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | 175 | 1
Available for sale, Securities in Unrealized Loss Position, Less than 12 Months [Abstract] |  |
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value | $ 423,575 | $ 6,166
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value | 22,476 | 0
Available for sale securities, Unrealized Loss Position, Fair Value | 446,051 | 6,166
Available for sale securities, Securities in Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 7,762 | 5
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 726 | 0
Available for sale securities, Unrealized Loss Position, Accumulated Loss | $ 8,488 | $ 5
Residential agency mortgage-backed securities [Member] |  |
Available for sale, Unrealized Loss Position [Line Items] |  |
Available for sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | 120 | 38
Available for sale, Securities in Unrealized Loss Position, Less than 12 Months [Abstract] |  |
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value | $ 2,382,094 | $ 786,890
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value | 750,044 | 160,747
Available for sale securities, Unrealized Loss Position, Fair Value | 3,132,138 | 947,637
Available for sale securities, Securities in Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 37,121 | 6,605
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 20,327 | 120
Available for sale securities, Unrealized Loss Position, Accumulated Loss | $ 57,448 | $ 6,725
Commercial agency mortgage-backed securities [Member] |  |
Available for sale, Unrealized Loss Position [Line Items] |  |
Available for sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | 165 | 37
Available for sale, Securities in Unrealized Loss Position, Less than 12 Months [Abstract] |  |
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value | $ 2,104,689 | $ 350,506
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value | 703,216 | 277,627
Available for sale securities, Unrealized Loss Position, Fair Value | 2,807,905 | 628,133
Available for sale securities, Securities in Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 35,488 | 1,587
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 12,527 | 494
Available for sale securities, Unrealized Loss Position, Accumulated Loss | $ 48,015 | $ 2,081
Other debt securities [Member] |  |
Available for sale, Unrealized Loss Position [Line Items] |  |
Available for sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | 1 | 1
Available for sale, Securities in Unrealized Loss Position, Less than 12 Months [Abstract] |  |
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value | $ 0 | $ 0
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value | 472 | 472
Available for sale securities, Unrealized Loss Position, Fair Value | 472 | 472
Available for sale securities, Securities in Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Available for sale securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 0 | 0
Available for sale securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 28 | 28
Available for sale securities, Unrealized Loss Position, Accumulated Loss | $ 28 | $ 28

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- Definition Amount of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 9 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aaa) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27161-111563 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 + Details
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922890-210455 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27337-111563 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456 + Details
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- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922890-210455 + Details
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922890-210455 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456 + Details
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