Debt Securities, Percentage Of Portfolio

No definition available.

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- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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- Definition

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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- Definition

Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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- Definition

Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), without single maturity date and not allocated over maturity grouping.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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- Definition

Amount, after allowance for credit loss, of accrued interest on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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- Definition

Amount excluding accrued interest, 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

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- Definition

Amortized cost excluding accrued interest, before allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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- Definition

Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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- Definition

Amount of unrealized and realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

No definition available.

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- Definition

Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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- Definition

Amount of cash inflow from sale of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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Securities Available for Sale - Summary of Securities Available for Sale (Details)	6 Months Ended		9 Months Ended
	Jun. 30, 2021 USD ($) security	Jun. 30, 2020 USD ($)	Sep. 30, 2020	Dec. 31, 2020 USD ($) security
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 2,254,609,000			$ 2,239,433,000
Gross Unrealized Gains	30,869,000			48,041,000
Gross Unrealized Losses	(11,308,000)			(1,863,000)
Allowance For Investment Credit Losses	0			0
Fair Value	2,274,170,000			2,285,611,000
Net gains on sales of securities available for sale	0	$ 0
Proceeds from sale of securities available for sale	0	$ 0
Unrealized gains on securities available for sale net of taxes	$ 15,051,000			$ 32,753,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions \| security	91			33
Accrued interest receivable for investment securities available for sale	$ 4,700,000			$ 4,700,000
Available-for-sale Securities
Debt Securities, Available-for-sale [Line Items]
Unrealized gains on securities available for sale net of taxes	14,400,000			33,200,000
Collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	858,603,000			990,679,000
Gross Unrealized Gains	8,362,000			11,482,000
Gross Unrealized Losses	(2,389,000)			(844,000)
Allowance For Investment Credit Losses	0			0
Fair Value	864,576,000			1,001,317,000
No single maturity date, fair value	864,576,000
Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Allowance For Investment Credit Losses	0
Mortgage-backed securities: Residential
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	663,223,000			672,667,000
Gross Unrealized Gains	3,127,000			8,460,000
Gross Unrealized Losses	(6,148,000)			(114,000)
Allowance For Investment Credit Losses	0			0
Fair Value	$ 660,202,000			$ 681,013,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions \| security	47			8
No single maturity date, fair value	$ 660,202,000
Mortgage-backed securities: Commercial
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	540,908,000			$ 482,874,000
Gross Unrealized Gains	16,443,000			25,026,000
Gross Unrealized Losses	(1,738,000)			(21,000)
Allowance For Investment Credit Losses	0			0
Fair Value	$ 555,613,000			$ 507,879,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions \| security	11			1
No single maturity date, fair value	$ 555,613,000
Corporate securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	23,422,000			$ 7,000,000
Gross Unrealized Gains	120,000			15,000
Gross Unrealized Losses	(928,000)			(881,000)
Allowance For Investment Credit Losses	0			0
Fair Value	$ 22,614,000			$ 6,134,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions \| security	3			1
Municipal securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 106,125,000			$ 86,213,000
Gross Unrealized Gains	2,715,000			3,058,000
Gross Unrealized Losses	(44,000)			(3,000)
Allowance For Investment Credit Losses	0			0
Fair Value	$ 108,796,000			$ 89,268,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions \| security	5			1
Non-US Government and Agency Securities \| Credit concentration risk \| Stockholders' equity
Debt Securities, Available-for-sale [Line Items]
Maximum exposure to any single issuer	10.00%		10.00%
Asset-backed Securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 62,328,000
Gross Unrealized Gains	102,000
Gross Unrealized Losses	(61,000)
Allowance For Investment Credit Losses	0
Fair Value	$ 62,369,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions \| security	4
No single maturity date, fair value	$ 62,369,000
U.S. Government Agency and U.S. Government Sponsored Enterprises
Debt Securities, Available-for-sale [Line Items]
Percentage of portfolio	91.00%