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Securities (Details) (USD $)
In Thousands, unless otherwise specified
9 Months Ended 12 Months Ended
Sep. 30, 2014
Security
Dec. 31, 2013
Security
Amortized cost and fair value of securities held-to-maturity [Abstract]    
Amortized Cost $ 91,810 $ 96,847
Gross Unrealized Gains 3,259 1,326
Gross Unrealized Losses (40) (720)
Securities held-to-maturity, fair value 95,029 97,453
Amortized cost and fair value of securities available-for-sale [Abstract]    
Amortized Cost 144,518 163,695
Gross Unrealized Gains 691 350
Gross Unrealized Losses (2,796) (8,406)
Securities available-for-sale, at fair value 142,413 155,639
Securities Available-for-Sale, Gross Unrealized Losses [Abstract]    
Less Than Twelve Months 131 6,586
More Than Twelve Months 2,665 1,820
Total 2,796 8,406
Securities Available-for-Sale, Fair Value [Abstract]    
Less than Twelve Months 14,867 119,178
More Than Twelve Months 89,966 20,234
Total 104,833 139,412
Securities Held-to-Maturity, Gross Unrealized Losses [Abstract]    
Less Than Twelve Months 0 715
More Than Twelve Months 40 5
Total 40 720
Securities Held-to-Maturity, Fair Value [Abstract]    
Less than Twelve Months 0 23,765
More Than Twelve Months 2,773 95
Total 2,773 23,860
Available for Sale and Held to Maturity Securities Continuous Unrealized Loss Position Aggregate Losses [Abstract]    
Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position Less Than 12 Months Aggregate Losses 131 7,301
Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position 12 Months Or Longer Aggregate Losses 2,705 1,825
Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position Aggregate Losses 2,836 9,126
Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position Fair Value [Abstract]    
Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position Less Than 12 Months Fair Value 14,867 142,943
Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position 12 Months Or Longer Fair Value 92,739 20,329
Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position Fair Value 107,606 163,272
Available-for-sale securities with continuous unrealized loss position, number of securities [Abstract]    
Cause caused by increases in market interest rates.  
Number of Securities 68 107
Held-to-maturity securities with continuous unrealized loss position, number of securities [Abstract]    
Number of Securities 6 51
Available for sale and held to maturity securities, Number of positions 74 158
US Treasury securities [Member]
   
Amortized cost and fair value of securities available-for-sale [Abstract]    
Amortized Cost 0 0
Gross Unrealized Gains 0 0
Gross Unrealized Losses 0 0
Securities available-for-sale, at fair value 0 0
Securities Available-for-Sale, Gross Unrealized Losses [Abstract]    
Less Than Twelve Months 0 0
More Than Twelve Months 0 0
Total 0 0
Securities Available-for-Sale, Fair Value [Abstract]    
Less than Twelve Months 0 0
More Than Twelve Months 0 0
Total 0 0
Available-for-sale securities with continuous unrealized loss position, number of securities [Abstract]    
Number of Securities 0 0
Obligations of U.S. Government agencies [Member]
   
Amortized cost and fair value of securities available-for-sale [Abstract]    
Amortized Cost 14,816 15,189
Gross Unrealized Gains 237 263
Gross Unrealized Losses (250) (428)
Securities available-for-sale, at fair value 14,803 15,024
Securities Available-for-Sale, Gross Unrealized Losses [Abstract]    
Less Than Twelve Months 0 0
More Than Twelve Months 250 428
Total 250 428
Securities Available-for-Sale, Fair Value [Abstract]    
Less than Twelve Months 0 0
More Than Twelve Months 4,219 4,403
Total 4,219 4,403
Securities Held-to-Maturity, Gross Unrealized Losses [Abstract]    
Less Than Twelve Months 0 0
More Than Twelve Months 3 5
Total 3 5
Securities Held-to-Maturity, Fair Value [Abstract]    
Less than Twelve Months 0 0
More Than Twelve Months 97 95
Total 97 95
Available-for-sale securities with continuous unrealized loss position, number of securities [Abstract]    
Number of Securities 1 1
Held-to-maturity securities with continuous unrealized loss position, number of securities [Abstract]    
Number of Securities 1 1
Obligations of states and political subdivisions [Member]
   
Amortized cost and fair value of securities available-for-sale [Abstract]    
Amortized Cost 50,469 51,032
Gross Unrealized Gains 451 86
Gross Unrealized Losses (735) (4,018)
Securities available-for-sale, at fair value 50,185 47,100
Securities Available-for-Sale, Gross Unrealized Losses [Abstract]    
Less Than Twelve Months 1 3,246
More Than Twelve Months 734 772
Total 735 4,018
Securities Available-for-Sale, Fair Value [Abstract]    
Less than Twelve Months 1,433 36,235
More Than Twelve Months 23,560 6,450
Total 24,993 42,685
Securities Held-to-Maturity, Gross Unrealized Losses [Abstract]    
Less Than Twelve Months 0 715
More Than Twelve Months 37 0
Total 37 715
Securities Held-to-Maturity, Fair Value [Abstract]    
Less than Twelve Months 0 23,765
More Than Twelve Months 2,676 0
Total 2,676 23,765
Available-for-sale securities with continuous unrealized loss position, number of securities [Abstract]    
Number of Securities 44 82
Held-to-maturity securities with continuous unrealized loss position, number of securities [Abstract]    
Number of Securities 5 50
Mortgage-backed securities [Member]
   
Amortized cost and fair value of securities available-for-sale [Abstract]    
Amortized Cost 75,733 94,685
Gross Unrealized Gains 0 0
Gross Unrealized Losses (1,782) (3,935)
Securities available-for-sale, at fair value 73,951 90,750
Securities Available-for-Sale, Gross Unrealized Losses [Abstract]    
Less Than Twelve Months 111 3,321
More Than Twelve Months 1,671 614
Total 1,782 3,935
Securities Available-for-Sale, Fair Value [Abstract]    
Less than Twelve Months 12,554 81,664
More Than Twelve Months 61,397 9,086
Total 73,951 90,750
Available-for-sale securities with continuous unrealized loss position, number of securities [Abstract]    
Number of Securities 10 12
Money market investments [Member]
   
Amortized cost and fair value of securities available-for-sale [Abstract]    
Amortized Cost 702 691
Gross Unrealized Gains 0 0
Gross Unrealized Losses 0 0
Securities available-for-sale, at fair value 702 691
Corporate bonds [Member]
   
Amortized cost and fair value of securities available-for-sale [Abstract]    
Amortized Cost 2,698 2,098
Gross Unrealized Gains 3 1
Gross Unrealized Losses (13) (25)
Securities available-for-sale, at fair value 2,688 2,074
Securities Available-for-Sale, Gross Unrealized Losses [Abstract]    
Less Than Twelve Months 3 19
More Than Twelve Months 10 6
Total 13 25
Securities Available-for-Sale, Fair Value [Abstract]    
Less than Twelve Months 796 1,279
More Than Twelve Months 790 295
Total 1,586 1,574
Available-for-sale securities with continuous unrealized loss position, number of securities [Abstract]    
Number of Securities 12 12
Debt Securities [Member]
   
Securities Available-for-Sale, Gross Unrealized Losses [Abstract]    
Less Than Twelve Months 115 6,586
More Than Twelve Months 2,665 1,820
Total 2,780 8,406
Securities Available-for-Sale, Fair Value [Abstract]    
Less than Twelve Months 14,783 119,178
More Than Twelve Months 89,966 20,234
Total 104,749 139,412
Available-for-sale securities with continuous unrealized loss position, number of securities [Abstract]    
Number of Securities 67 107
Common Stock [Member]
   
Amortized cost and fair value of securities available-for-sale [Abstract]    
Amortized Cost 100  
Gross Unrealized Gains 0  
Gross Unrealized Losses (16)  
Securities available-for-sale, at fair value 84  
Securities Available-for-Sale, Gross Unrealized Losses [Abstract]    
Less Than Twelve Months 16 0
More Than Twelve Months 0 0
Total 16 0
Securities Available-for-Sale, Fair Value [Abstract]    
Less than Twelve Months 84 0
More Than Twelve Months 0 0
Total 84 0
Available-for-sale securities with continuous unrealized loss position, number of securities [Abstract]    
Number of Securities 1 0
Obligations of U.S. Government agencies [Member]
   
Amortized cost and fair value of securities held-to-maturity [Abstract]    
Amortized Cost 100 400
Gross Unrealized Gains 0 1
Gross Unrealized Losses (3) (5)
Securities held-to-maturity, fair value 97 396
Obligations of states and political subdivisions [Member]
   
Amortized cost and fair value of securities held-to-maturity [Abstract]    
Amortized Cost 29,678 30,120
Gross Unrealized Gains 454 29
Gross Unrealized Losses (37) (715)
Securities held-to-maturity, fair value 30,095 29,434
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
   
Amortized cost and fair value of securities held-to-maturity [Abstract]    
Amortized Cost 62,032 66,327
Gross Unrealized Gains 2,805 1,296
Gross Unrealized Losses 0 0
Securities held-to-maturity, fair value $ 64,837 $ 67,623