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Other Comprehensive Income/(Loss) - Summary of Changes in Accumulated Other Comprehensive Income (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012
Investment securities available-for-sale: Before-Tax |  |  |  |
Net change in fair value recorded in accumulated OCI, Before-Tax | $ 421 | $ 8,417 | $ (65,129) | $ 12,064
Net realized gains reclassified into earnings, Before-Tax |  |  | (2,094) |
Net change, Before-Tax | 421 | 8,417 | (67,223) | 12,064
Investment securities available-for-sale: Tax Effect |  |  |  |
Net change in fair value recorded in accumulated OCI, Tax Effect | 176 |  | (27,355) |
Net realized gains reclassified into earnings, Tax Effect |  |  | (879) |
Net change, Tax Effect | 176 | 3,536 | (28,234) | 5,068
Investment securities available-for-sale: After-Tax |  |  |  |
Net change in fair value recorded in accumulated OCI, After-Tax | 245 |  | (37,774) |
Net realized gains reclassified into earnings, After-Tax |  |  | (1,215) |
Other comprehensive income (loss), net of tax | $ 245 | $ 4,881 | $ (38,989) | $ 6,996

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- Definition Amount before tax, after reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=28358780&loc=SL7669646-108580 + Details
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- Definition Amount after tax and reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=28358780&loc=SL7669646-108580 + Details
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- Definition Amount of tax expense (benefit), after reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=28358780&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=28358780&loc=d3e640-108580 + Details
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