Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating activities
Net income	$ 25,490us-gaap_NetIncomeLoss	$ 23,312us-gaap_NetIncomeLoss	$ 28,577us-gaap_NetIncomeLoss
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	145	8,208	5,678
Depreciation and amortization of property, plant, and equipment	4,405us-gaap_DepreciationNonproduction	4,666us-gaap_DepreciationNonproduction	4,034us-gaap_DepreciationNonproduction
Amortization of premiums on investments, net	961	884	2,329
Amortization (accretion) of FDIC indemnification asset, net	3,979	5,597	(458)
Amortization of intangible assets	787us-gaap_AmortizationOfIntangibleAssets	729us-gaap_AmortizationOfIntangibleAssets	804us-gaap_AmortizationOfIntangibleAssets
Gain on acquisitions and divestitures, net	(755)us-gaap_GainLossOnSaleOfBusiness
Gain on sale of loans	(671)us-gaap_GainLossOnSalesOfLoansNet	(1,211)us-gaap_GainLossOnSalesOfLoansNet	(1,065)us-gaap_GainLossOnSalesOfLoansNet
Equity-based compensation expense	332us-gaap_ShareBasedCompensation	18us-gaap_ShareBasedCompensation	132us-gaap_ShareBasedCompensation
(Gain) loss on sale of property, plant, and equipment	(113)	(158)	82
Loss on sales of other real estate	3,227us-gaap_GainLossOnSaleOfOtherAssets	2,785us-gaap_GainLossOnSaleOfOtherAssets	1,869us-gaap_GainLossOnSaleOfOtherAssets
Loss (gain) on sale of securities	1,385us-gaap_GainLossOnSaleOfSecuritiesNet	(399)us-gaap_GainLossOnSaleOfSecuritiesNet	(483)us-gaap_GainLossOnSaleOfSecuritiesNet
Impairment losses recognized in earnings, net	737	320	942
FHLB debt prepayment fees	5,008us-gaap_AmortizationOfFinancingCosts
Deferred income tax benefit	3,765us-gaap_DeferredIncomeTaxExpenseBenefit	(3,654)us-gaap_DeferredIncomeTaxExpenseBenefit	(896)us-gaap_DeferredIncomeTaxExpenseBenefit
Proceeds from sale of mortgage loans	28,443	75,348	67,502
Origination of mortgage loans	(28,681)	(68,348)	(67,289)
Decrease in accrued interest receivable	1,206	321	2,356
(Increase) decrease in other operating activities	(4,196)	(7,554)	12,525
Net cash provided by operating activities	41,689	44,518	56,639
Investing activities
Proceeds from sale of securities available for sale	162,443	105,934	155,600
Proceeds from maturities, prepayments, and calls of securities available for sale	48,915	87,055	105,830
Proceeds from maturities and calls of securities held to maturity	190	250	2,690
Payments to acquire securities available for sale	(6,047)	(201,138)	(245,344)
Payments to acquire securities held to maturity	(57,675)
(Originations) collections of loans, net	(64,115)	(11,662)	75,091
Proceeds from the redemption of FHLB stock, net	4,349	470	2,101
Cash received (paid) in acquisitions and divestitures, net	178,604	(697)	152,283
Proceeds from the FDIC	4,770	14,311	2,974
Payments to acquire property, plant, and equipment	(2,146)	(2,772)	(8,008)
Proceeds from sale of property, plant, and equipment	1,048	480	1,151
Proceeds from sale of other real estate	10,619	6,602	8,106
Net cash provided by (used in) investing activities	280,955	(1,167)	252,474
Financing activities
Increase (decrease) in noninterest-bearing deposits, net	68,246	(3,672)	12,657
Decrease in interest-bearing deposits, net	(121,912)	(75,761)	(175,132)
(Decrease) increase in federal funds purchased, net	(16,000)	16,000
Proceeds from (repayments of) securities sold under agreements to repurchase	3,432	(17,810)	(13,172)
Repayments of long-term debt	(63,097)us-gaap_RepaymentsOfLongTermDebt	(11,594)us-gaap_RepaymentsOfLongTermDebt	(25,769)us-gaap_RepaymentsOfLongTermDebt
Proceeds from stock options exercised	53	85	144
Excess tax benefit from equity-based compensation	5	9	6
Payments for repurchase of treasury stock	(2,168)	(28,421)	(1,012)
Payments of common dividends	(9,200)us-gaap_PaymentsOfDividendsCommonStock	(9,475)us-gaap_PaymentsOfDividendsCommonStock	(8,162)us-gaap_PaymentsOfDividendsCommonStock
Payments of preferred dividends	(910)	(992)	(1,120)
Net cash used in financing activities	(141,551)	(131,631)	(211,560)
Net increase (decrease) in cash and cash equivalents	181,093	(88,280)	97,553
Cash and cash equivalents at beginning of period	56,567	144,847	47,294
Cash and cash equivalents at end of period	237,660	56,567	144,847
Supplemental transactions - noncash items
Transfer of loans to other real estate	12,620us-gaap_TransferToOtherRealEstate	18,438us-gaap_TransferToOtherRealEstate	9,083us-gaap_TransferToOtherRealEstate
Loans originated to finance other real estate	671fcbc_LoansToFinancePurchaseOfRealEstate	3,196fcbc_LoansToFinancePurchaseOfRealEstate	1,405fcbc_LoansToFinancePurchaseOfRealEstate
Supplemental disclosure - cash flow information
Cash paid for interest	15,289us-gaap_InterestPaid	18,146us-gaap_InterestPaid	19,656us-gaap_InterestPaid
Cash paid for income taxes	$ 12,552us-gaap_IncomeTaxesPaidNet	$ 3,000us-gaap_IncomeTaxesPaidNet	$ 10,388us-gaap_IncomeTaxesPaidNet

Loans to finance the purchase of real estate.

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Value transferred from mortgage loans to real estate owned (REO) in noncash transactions.

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