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Investment Securities - Gross unrealized losses (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
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Investment securities available-for-sale |  |
Unrealized losses less than 12 months | $ (58,556) | $ (10,290)
Fair value less than 12 months | 569,144 | 578,270
Unrealized losses over 12 months | (36,395) | (1,681)
Fair value over 12 months | 214,081 | 55,084
Total Unrealized losses | (94,951) | (11,971)
Total Fair value | 783,225 | 633,354
Held-to-maturity investment securities |  |
Unrealized losses less than 12 months | (37,794) | (3,494)
Fair value less than 12 months | 290,506 | 257,583
Total Unrealized losses | (37,794) | (3,494)
Total Fair value | 290,506 | 257,583
Unrealized losses less than 12 months | (96,350) | (13,784)
Fair value less than 12 months | 859,650 | 835,853
Unrealized losses over 12 months | (36,395) | (1,681)
Fair value over 12 months | 214,081 | 55,084
Total Unrealized losses | (132,745) | (15,465)
Total Fair value | 1,073,731 | 890,937
Obligations of state and political agencies. |  |
Held-to-maturity investment securities |  |
Unrealized losses less than 12 months | (12,927) | (349)
Fair value less than 12 months | 122,734 | 53,210
Total Unrealized losses | (12,927) | (349)
Total Fair value | 122,734 | 53,210
Mortgage backed securities - Residential agency |  |
Investment securities available-for-sale |  |
Unrealized losses less than 12 months | (51,859) | (10,156)
Fair value less than 12 months | 436,234 | 554,811
Unrealized losses over 12 months | (36,395) | (1,681)
Fair value over 12 months | 214,079 | 55,082
Total Unrealized losses | (88,254) | (11,837)
Total Fair value | 650,313 | 609,893
Held-to-maturity investment securities |  |
Unrealized losses less than 12 months | (24,867) | (3,145)
Fair value less than 12 months | 167,772 | 204,373
Total Unrealized losses | (24,867) | (3,145)
Total Fair value | 167,772 | 204,373
Mortgage backed securities - Commercial |  |
Investment securities available-for-sale |  |
Unrealized losses less than 12 months | (3,947) | (123)
Fair value less than 12 months | 76,130 | 17,470
Total Unrealized losses | (3,947) | (123)
Total Fair value | 76,130 | 17,470
Asset backed securities |  |
Investment securities available-for-sale |  |
Fair value over 12 months | 2 | 2
Total Fair value | 2 | 2
Corporate bonds |  |
Investment securities available-for-sale |  |
Unrealized losses less than 12 months | (2,750) | (11)
Fair value less than 12 months | 56,780 | 5,989
Total Unrealized losses | (2,750) | (11)
Total Fair value | $ 56,780 | $ 5,989

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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 and held-to-maturity), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References No definition available. + 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 and held-to-maturity), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References No definition available. + 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 and held-to-maturity), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References No definition available. + 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 and held-to-maturity), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References No definition available. + Details
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