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Investment Securities - Summary of Available-for-Sale Debt Securities by Stated Maturity (Detail) $ in Thousands | Jun. 30, 2018 USD ($)
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Debt Securities, Available-for-sale [Line Items] |
Due in one year or less, amortized cost | $ 0
Due after one year through five years, amortized cost | 0
Due after five years through ten years, amortized cost | 179,413
Due after ten years, amortized cost | 202,132
Total debt securities, amortized cost | 1,206,202
Due in one year or less, fair value | 0
Due after one year through five years, fair value | 0
Due after five years through ten years, fair value | 171,214
Due after ten years, fair value | 189,794
Total debt securities, fair value | 1,157,944
Agency-guaranteed residential mortgage-backed securities |
Debt Securities, Available-for-sale [Line Items] |
Agency-guaranteed mortgage backed securities, amortized cost | 490,425
Agency-guaranteed mortgage-backed securities, fair value | 476,563
Total debt securities, fair value | 476,563
Agency-guaranteed commercial real estate mortgage-backed securities |
Debt Securities, Available-for-sale [Line Items] |
Agency-guaranteed mortgage backed securities, amortized cost | 334,232
Agency-guaranteed mortgage-backed securities, fair value | 320,373
Total debt securities, fair value | $ 320,373

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- Definition 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 second through fifth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27198-111563 + Details
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