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Activity in Accretable Yield Related to PCI loans, by Acquisition (Detail) (USD $) In Thousands, unless otherwise specified | 9 Months Ended
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Sep. 30, 2014 | Sep. 30, 2013
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, accretable Yield |  |
Accretable yield, Beginning Balance | $ 15,640 | $ 24,243
Additions | 122 | 337
Accretion | (6,170) | (5,981)
Reclassifications from (to) nonaccretable difference | 15,202 | (2,100)
Removal events | (1,966) | (3,544)
Accretable yield, Ending Balance | 22,828 | 12,955
Peoples |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, accretable Yield |  |
Accretable yield, Beginning Balance | 5,294 | 2,342
Additions | 98 | 148
Accretion | (1,601) | (1,315)
Reclassifications from (to) nonaccretable difference | 1,205 | 4,276
Removal events | (521) | (1,417)
Accretable yield, Ending Balance | 4,475 | 4,034
Waccamaw Bank |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, accretable Yield |  |
Accretable yield, Beginning Balance | 10,338 | 21,886
Additions | 24 | 189
Accretion | (4,540) | (4,558)
Reclassifications from (to) nonaccretable difference | 13,968 | (6,477)
Removal events | (1,445) | (2,127)
Accretable yield, Ending Balance | 18,345 | 8,913
Other |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, accretable Yield |  |
Accretable yield, Beginning Balance | 8 | 15
Accretion | (29) | (108)
Reclassifications from (to) nonaccretable difference | 29 | 101
Accretable yield, Ending Balance | $ 8 | $ 8

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- Definition Sale or transfer of a loan during the period resulting in a reduction in the excess of a loan's cash flows expected to be collected over the investor's initial investment. This relates to loans accounted for as debt securities, with evidence of deterioration of credit quality since origination that was acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. + 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)(2) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 + Details
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- Definition Amount of the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not 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)(2) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 + Details
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- Definition Amount of decrease from accretion of the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not 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)(2) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 + Details
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- Definition Amount of additions to the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not 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)(2) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 + Details
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- Definition Amount of reclassification (to) from nonaccretable difference (from) to the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not 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)(2) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 + Details
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