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Merger accounting - Summary of Acquired Nonimpaired and Impaired Loans (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013
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Acquired Non Impaired Loans [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Contractually required principal and interest at acquisition | $ 501,423
Expected cash flows at acquisition | 501,423
Interest component of expected cash flows (accretable discount) | (4,773)
Fair value of acquired loans | 496,650
Acquired Impaired Loans [Member] |
Accounts, Notes, Loans and Financing Receivable [Line Items] |
Contractually required principal and interest at acquisition | 19,353
Contractual cash flows not expected to be collected (nonaccretable discount) | (10,873)
Expected cash flows at acquisition | 8,480
Interest component of expected cash flows (accretable discount) | (1,128)
Fair value of acquired loans | $ 7,352

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- Definition Amount of cash flows expected to be collected at acquisition of acquired loans accounted for as debt securities with evidence of deterioration of credit quality. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27045933&loc=d3e13503-111538 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 + Details
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