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Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dividends declared per share (in dollars per share) $ 0.18us-gaap_CommonStockDividendsPerShareDeclared $ 0.16us-gaap_CommonStockDividendsPerShareDeclared
Common stock issued in acquisition, shares 4,933,115us-gaap_StockIssuedDuringPeriodSharesAcquisitions  
Treasury stock issued for restricted awards, net of forfeitures 71,699us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures 0us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
Forfeitures of restricted stock, shares 3,685us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited 19,599us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited
Common Stock [Member]    
Common stock issued in acquisition, shares 4,933,115us-gaap_StockIssuedDuringPeriodSharesAcquisitions
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
 
Additional Paid-in Capital [Member]    
Common stock issued in acquisition, shares 4,933,115us-gaap_StockIssuedDuringPeriodSharesAcquisitions
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
 
Retained Earnings [Member]    
Dividends declared per share (in dollars per share) $ 0.18us-gaap_CommonStockDividendsPerShareDeclared
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
$ 0.16us-gaap_CommonStockDividendsPerShareDeclared
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
Treasury stock issued for restricted awards, net of forfeitures 71,699us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
0us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
Forfeitures of restricted stock, shares 3,685us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
19,599us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
Treasury Stock [Member]    
Treasury stock issued for restricted awards, net of forfeitures 71,699us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
0us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
Forfeitures of restricted stock, shares 3,685us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember
19,599us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_TreasuryStockMember