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Investment Securities - Summary of Investment Securities by Stated Maturity (Detail) $ in Thousands | Dec. 31, 2017 USD ($)
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Schedule of Available-for-sale Securities [Line Items] |
Amortized cost, due in one year or less | $ 0
Amortized cost, due after one year through five years | 0
Amortized cost, due after five years through ten years | 42,959
Amortized cost, due after ten years | 2,000
Amortized cost | 469,989
Fair value, due in one year or less | 0
Fair value, due after one year through five years | 0
Fair value, due after five years through ten years | 44,005
Fair value, due after ten years | 2,084
Total debt securities, fair value | 468,019
Agency-guaranteed residential mortgage-backed securities |
Schedule of Available-for-sale Securities [Line Items] |
Mortgage-backed securities, amortized cost | 186,221
Mortgage-backed securities, fair value | 183,458
Agency-guaranteed commercial real estate mortgage-backed securities |
Schedule of Available-for-sale Securities [Line Items] |
Mortgage-backed securities, amortized cost | 238,809
Mortgage-backed securities, fair value | $ 238,472

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- Definition Amount after adjustments of available-for-sale debt securities at cost, maturing in the second fiscal year through the fifth fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings less cumulative-effect adjustments, and fair value hedge accounting adjustments. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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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