Investment Securities - Contractual Maturities of Debt Securities Available for Sale (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Amortized Cost
Due in one year	$ 8,593
Due after one year through five years	184,748
Due after five years through ten years	271,404
Due after ten years	255,529
Residential mortgage-backed securities	744,547
Amortized Cost	1,464,821	$ 1,116,091
Fair Value
Due in one year	8,553
Due after one year through five years	174,982
Due after five years through ten years	246,134
Due after ten years	195,520
Residential mortgage-backed securities	646,665
Total	$ 1,271,854	$ 1,128,809

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in sixth through tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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