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Loans and Allowance for Loan Losses - Schedule of Changes in Allowance for Loan Losses and Recorded Investment in Loans (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended |  |  |  | 6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended |  | 6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended
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Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Dec. 31, 2013 | Jun. 30, 2014 Other Loans [Member] | Dec. 31, 2013 Other Loans [Member] | Jun. 30, 2014 FUSB & ALC [Member] | Dec. 31, 2013 FUSB & ALC [Member] | Jun. 30, 2014 FUSB & ALC [Member] Commercial [Member] | Dec. 31, 2013 FUSB & ALC [Member] Commercial [Member] | Jun. 30, 2014 FUSB & ALC [Member] Commercial Real Estate [Member] | Dec. 31, 2013 FUSB & ALC [Member] Commercial Real Estate [Member] | Jun. 30, 2014 FUSB & ALC [Member] Consumer [Member] | Dec. 31, 2013 FUSB & ALC [Member] Consumer [Member] | Jun. 30, 2014 FUSB & ALC [Member] Residential Real Estate [Member] | Dec. 31, 2013 FUSB & ALC [Member] Residential Real Estate [Member] | Jun. 30, 2014 FUSB & ALC [Member] Other Loans [Member] | Dec. 31, 2013 FUSB & ALC [Member] Other Loans [Member] | Jun. 30, 2014 ALC [Member] | Dec. 31, 2013 ALC [Member] | Jun. 30, 2014 ALC [Member] Consumer [Member] | Dec. 31, 2013 ALC [Member] Consumer [Member] | Jun. 30, 2014 ALC [Member] Residential Real Estate [Member] | Dec. 31, 2013 ALC [Member] Residential Real Estate [Member] | Jun. 30, 2014 ALC [Member] Other Loans [Member] | Jun. 30, 2014 FUSB [Member] | Dec. 31, 2013 FUSB [Member] | Jun. 30, 2014 FUSB [Member] Commercial [Member] | Dec. 31, 2013 FUSB [Member] Commercial [Member] | Jun. 30, 2014 FUSB [Member] Commercial Real Estate [Member] | Dec. 31, 2013 FUSB [Member] Commercial Real Estate [Member] | Jun. 30, 2014 FUSB [Member] Consumer [Member] | Dec. 31, 2013 FUSB [Member] Consumer [Member] | Jun. 30, 2014 FUSB [Member] Residential Real Estate [Member] | Dec. 31, 2013 FUSB [Member] Residential Real Estate [Member] | Jun. 30, 2014 FUSB [Member] Other Loans [Member] | Dec. 31, 2013 FUSB [Member] Other Loans [Member]
Allowance for loan losses: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  | $ 9,396 |  |  |  |  | $ 9,396 | $ 19,278 | $ 592 | $ 977 | $ 4,852 | $ 14,216 | $ 2,847 | $ 2,901 | $ 1,092 | $ 1,118 | $ 13 | $ 66 | $ 3,124 | $ 3,513 | $ 2,667 | $ 2,733 | $ 457 | $ 780 |  | $ 6,272 | $ 15,765 | $ 592 | $ 977 | $ 4,852 | $ 14,216 | $ 180 | $ 168 | $ 635 | $ 338 | $ 13 | $ 66
Charge-offs |  |  |  |  |  |  |  | 2,827 | 13,131 | 268 | 537 | 876 | 8,055 | 1,508 | 3,329 | 175 | 1,210 |  |  | 1,588 | 3,504 | 1,492 | 2,979 | 96 | 525 |  | 1,239 | 9,627 | 268 | 537 | 876 | 8,055 | 16 | 350 | 79 | 685 | 0 |
Recoveries |  |  |  |  |  |  |  | 953 | 3,891 | 203 | 141 | 221 | 2,747 | 503 | 970 | 25 | 29 | 1 | 4 | 449 | 895 | 432 | 874 | 17 | 21 |  | 504 | 2,996 | 203 | 141 | 221 | 2,747 | 71 | 96 | 8 | 8 | 1 | 4
Provision for loan losses | (264) | 53 | 150 | 559 |  |  |  | 150 | (642) | (228) | 11 | (36) | (4,056) | 431 | 2,305 | (3) | 1,155 | (14) | (57) | 651 | 2,220 | 546 | 2,039 | 105 | 181 |  | (501) | (2,862) | (228) | 11 | (36) | (4,056) | (115) | 266 | (108) | 974 | (14) | (57)
Ending balance | 7,672 |  | 7,672 |  |  |  |  | 7,672 | 9,396 | 299 | 592 | 4,161 | 4,852 | 2,273 | 2,847 | 939 | 1,092 |  | 13 | 2,636 | 3,124 | 2,153 | 2,667 | 483 | 457 |  | 5,036 | 6,272 | 299 | 592 | 4,161 | 4,852 | 120 | 180 | 456 | 635 | 0 | 13
Ending balance individually evaluated for impairment |  |  |  |  |  |  |  | 1,118 | 3,069 |  | 219 | 1,118 | 2,839 |  |  |  | 11 |  |  |  |  |  |  |  |  |  | 1,118 | 3,069 | 0 | 219 | 1,118 | 2,839 | 0 |  | 0 | 11 | 0 |
Ending balance collectively evaluated for impairment |  |  |  |  |  |  |  | 6,554 | 6,327 | 299 | 373 | 3,043 | 2,013 | 2,273 | 2,847 | 939 | 1,081 |  | 13 | 2,636 | 3,124 | 2,153 | 2,667 | 483 | 457 |  | 3,918 | 3,203 | 299 | 373 | 3,043 | 2,013 | 120 | 180 | 456 | 624 | 0 | 13
Loan receivables: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending balance | 286,690 |  | 286,690 |  | 315,433 | 976 | 604 | 286,690 | 315,433 | 17,385 | 37,772 | 150,328 | 156,634 | 62,237 | 58,824 | 55,764 | 61,599 | 976 | 604 | 77,934 | 75,559 | 53,766 | 48,938 | 24,168 | 26,621 | 0 | 208,756 | 239,874 | 17,385 | 37,772 | 150,328 | 156,634 | 8,471 | 9,886 | 31,596 | 34,978 | 976 | 604
Ending balance individually evaluated for impairment |  |  |  |  |  |  |  | 11,157 | 32,551 |  | 753 | 11,157 | 28,813 |  |  |  | 2,985 |  |  |  |  |  |  |  |  |  | 11,157 | 32,551 | 0 | 753 | 11,157 | 28,813 | 0 |  | 0 | 2,985 | 0 |
Ending balance collectively evaluated for impairment |  |  |  |  |  |  |  | $ 275,533 | $ 282,882 | $ 17,385 | $ 37,019 | $ 139,171 | $ 127,821 | $ 62,237 | $ 58,824 | $ 55,764 | $ 58,614 | $ 976 | $ 604 | $ 77,934 | $ 75,559 | $ 53,766 | $ 48,938 | $ 24,168 | $ 26,621 |  | $ 197,599 | $ 207,323 | $ 17,385 | $ 37,019 | $ 139,171 | $ 127,821 | $ 8,471 | $ 9,886 | $ 31,596 | $ 31,993 | $ 976 | $ 604

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- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953423-111524 + Details
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- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953423-111524 + Details
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- Definition Amount of recovery of financing receivables doubtful of collection that were previously charged off. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953423-111524 + Details
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- Definition Amount of direct write-downs of financing receivables charged against the allowance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953423-111524 + Details
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- Definition The balance of financing receivables that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953423-111524 + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section L -Subsection 1 + Details
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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522 + Details
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