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Note 3 - Loans and Allowance for Loan Losses (Details) - Age Analysis of Past Due Loans - USD ($)
Sep. 30, 2015
Dec. 31, 2014
Sep. 30, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans $ 2,217,388,000 $ 2,089,277,000  
Originated Loan [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 577,000 643,000  
Loans, current 1,519,133,000 1,245,473,000  
Loans 1,519,710,000 1,246,116,000 $ 1,186,713,000
Loans, recorded balance > 89 days and accruing 0 0  
Originated Loan [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 176,000 38,000  
Originated Loan [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 88,000 3,000  
Originated Loan [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 313,000 602,000  
Acquired Loan [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 7,797,000 6,743,000  
Loans, current 689,881,000 836,418,000  
Loans 697,678,000 843,161,000  
Loans, recorded balance > 89 days and accruing 0 26,000  
Acquired Loan [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 2,781,000 1,717,000  
Acquired Loan [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 484,000 1,920,000  
Acquired Loan [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 4,532,000 3,106,000  
Commercial Portfolio Segment [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans 1,877,620,000 1,715,303,000  
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans 643,118,000 550,607,000  
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans 47,734,000 51,974,000  
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans 427,016,000 430,388,000  
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans 636,227,000 559,574,000  
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans 123,525,000 122,760,000  
Commercial Portfolio Segment [Member] | Originated Loan [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 41,000 236,000  
Loans, current 1,402,279,000 1,152,953,000  
Loans 1,402,320,000 1,153,189,000 1,103,802,000
Loans, recorded balance > 89 days and accruing 0 0  
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 28,000 0  
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 0 0  
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 13,000 236,000  
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Commercial and Industrial [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 28,000 0  
Loans, current 522,318,000 384,570,000  
Loans 522,346,000 384,570,000  
Loans, recorded balance > 89 days and accruing 0 0  
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Commercial and Industrial [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 28,000 0  
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Commercial and Industrial [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 0 0  
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Commercial and Industrial [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 0 0  
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 0 0  
Loans, current 30,958,000 29,826,000  
Loans 30,958,000 29,826,000  
Loans, recorded balance > 89 days and accruing 0 0  
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 0 0  
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 0 0  
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 0 0  
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Real Estate Owner Occupied Loan [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 13,000 120,000  
Loans, current 306,526,000 291,638,000  
Loans 306,539,000 291,758,000  
Loans, recorded balance > 89 days and accruing 0 0  
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Real Estate Owner Occupied Loan [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 0 0  
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Real Estate Owner Occupied Loan [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 0 0  
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Real Estate Owner Occupied Loan [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 13,000 120,000  
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Real Estate Non Owner Occupied Loan [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 0 116,000  
Loans, current 505,715,000 410,861,000  
Loans 505,715,000 410,977,000  
Loans, recorded balance > 89 days and accruing 0 0  
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Real Estate Non Owner Occupied Loan [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 0 0  
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Real Estate Non Owner Occupied Loan [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 0 0  
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Real Estate Non Owner Occupied Loan [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 0 116,000  
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Real Estate Multi Family and Residential Rental Loan [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 0 0  
Loans, current 36,762,000 36,058,000  
Loans 36,762,000 36,058,000  
Loans, recorded balance > 89 days and accruing 0 0  
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Real Estate Multi Family and Residential Rental Loan [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 0 0  
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Real Estate Multi Family and Residential Rental Loan [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 0 0  
Commercial Portfolio Segment [Member] | Originated Loan [Member] | Real Estate Multi Family and Residential Rental Loan [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 0 0  
Commercial Portfolio Segment [Member] | Acquired Loan [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 5,889,000 3,479,000  
Loans, current 469,411,000 558,635,000  
Loans 475,300,000 562,114,000  
Loans, recorded balance > 89 days and accruing 0 0  
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 1,893,000 185,000  
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 93,000 1,093,000  
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 3,903,000 2,201,000  
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Commercial and Industrial [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 959,000 137,000  
Loans, current 119,813,000 165,900,000  
Loans 120,772,000 166,037,000  
Loans, recorded balance > 89 days and accruing 0 0  
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Commercial and Industrial [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 385,000 29,000  
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Commercial and Industrial [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 0 32,000  
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Commercial and Industrial [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 574,000 76,000  
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 257,000 38,000  
Loans, current 16,519,000 22,110,000  
Loans 16,776,000 22,148,000  
Loans, recorded balance > 89 days and accruing 0 0  
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 257,000 0  
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 0 38,000  
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 0 0  
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Real Estate Owner Occupied Loan [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 1,973,000 2,101,000  
Loans, current 118,504,000 136,529,000  
Loans 120,477,000 138,630,000  
Loans, recorded balance > 89 days and accruing 0 0  
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Real Estate Owner Occupied Loan [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 1,078,000 51,000  
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Real Estate Owner Occupied Loan [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 93,000 425,000  
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Real Estate Owner Occupied Loan [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 802,000 1,625,000  
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Real Estate Non Owner Occupied Loan [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 80,000 1,061,000  
Loans, current 130,432,000 147,536,000  
Loans 130,512,000 148,597,000  
Loans, recorded balance > 89 days and accruing 0 0  
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Real Estate Non Owner Occupied Loan [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 0 68,000  
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Real Estate Non Owner Occupied Loan [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 0 598,000  
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Real Estate Non Owner Occupied Loan [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 80,000 395,000  
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Real Estate Multi Family and Residential Rental Loan [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 2,620,000 142,000  
Loans, current 84,143,000 86,560,000  
Loans 86,763,000 86,702,000  
Loans, recorded balance > 89 days and accruing 0 0  
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Real Estate Multi Family and Residential Rental Loan [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 173,000 37,000  
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Real Estate Multi Family and Residential Rental Loan [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 0 0  
Commercial Portfolio Segment [Member] | Acquired Loan [Member] | Real Estate Multi Family and Residential Rental Loan [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 2,447,000 105,000  
Retail Portfolio Segment [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans 339,768,000 373,974,000  
Retail Portfolio Segment [Member] | Home Equity and Other [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans 146,765,000 159,278,000  
Retail Portfolio Segment [Member] | 1-4 Family Mortgages [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans 193,003,000 214,696,000  
Retail Portfolio Segment [Member] | Originated Loan [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 536,000 407,000  
Loans, current 116,854,000 92,520,000  
Loans 117,390,000 92,927,000 $ 82,911,000
Loans, recorded balance > 89 days and accruing 0 0  
Retail Portfolio Segment [Member] | Originated Loan [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 148,000 38,000  
Retail Portfolio Segment [Member] | Originated Loan [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 88,000 3,000  
Retail Portfolio Segment [Member] | Originated Loan [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 300,000 366,000  
Retail Portfolio Segment [Member] | Originated Loan [Member] | Home Equity and Other [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 58,000 41,000  
Loans, current 65,613,000 50,018,000  
Loans 65,671,000 50,059,000  
Loans, recorded balance > 89 days and accruing 0 0  
Retail Portfolio Segment [Member] | Originated Loan [Member] | Home Equity and Other [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 33,000 38,000  
Retail Portfolio Segment [Member] | Originated Loan [Member] | Home Equity and Other [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 21,000 3,000  
Retail Portfolio Segment [Member] | Originated Loan [Member] | Home Equity and Other [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 4,000 0  
Retail Portfolio Segment [Member] | Originated Loan [Member] | 1-4 Family Mortgages [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 478,000 366,000  
Loans, current 51,241,000 42,502,000  
Loans 51,719,000 42,868,000  
Loans, recorded balance > 89 days and accruing 0 0  
Retail Portfolio Segment [Member] | Originated Loan [Member] | 1-4 Family Mortgages [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 115,000 0  
Retail Portfolio Segment [Member] | Originated Loan [Member] | 1-4 Family Mortgages [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 67,000 0  
Retail Portfolio Segment [Member] | Originated Loan [Member] | 1-4 Family Mortgages [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 296,000 366,000  
Retail Portfolio Segment [Member] | Acquired Loan [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 1,908,000 3,264,000  
Loans, current 220,470,000 277,783,000  
Loans 222,378,000 281,047,000  
Loans, recorded balance > 89 days and accruing 0 26,000  
Retail Portfolio Segment [Member] | Acquired Loan [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 888,000 1,532,000  
Retail Portfolio Segment [Member] | Acquired Loan [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 391,000 827,000  
Retail Portfolio Segment [Member] | Acquired Loan [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 629,000 905,000  
Retail Portfolio Segment [Member] | Acquired Loan [Member] | Home Equity and Other [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 543,000 1,019,000  
Loans, current 80,551,000 108,200,000  
Loans 81,094,000 109,219,000  
Loans, recorded balance > 89 days and accruing 0 26,000  
Retail Portfolio Segment [Member] | Acquired Loan [Member] | Home Equity and Other [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 340,000 445,000  
Retail Portfolio Segment [Member] | Acquired Loan [Member] | Home Equity and Other [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 68,000 419,000  
Retail Portfolio Segment [Member] | Acquired Loan [Member] | Home Equity and Other [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 135,000 155,000  
Retail Portfolio Segment [Member] | Acquired Loan [Member] | 1-4 Family Mortgages [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 1,365,000 2,245,000  
Loans, current 139,919,000 169,583,000  
Loans 141,284,000 171,828,000  
Loans, recorded balance > 89 days and accruing 0 0  
Retail Portfolio Segment [Member] | Acquired Loan [Member] | 1-4 Family Mortgages [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 548,000 1,087,000  
Retail Portfolio Segment [Member] | Acquired Loan [Member] | 1-4 Family Mortgages [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due 323,000 408,000  
Retail Portfolio Segment [Member] | Acquired Loan [Member] | 1-4 Family Mortgages [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Loans, past due $ 494,000 $ 750,000