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Investment Securities (Amortized Cost and Estimated Fair Values of Investment Securities) (Details) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Securities [Line Items]    
Held-to-maturity Securities, Amortized Cost $ 74,835 $ 67,829
Held-to-maturity Securities, Unrealized Gains 1,575 946
Held-to-maturity Securities, Unrealized Losses (7) (344)
Held-to-maturity Securities, Fair Value 76,403 68,431
Available-for-sale Securities, Amortized Cost 147,645 153,559
Available-for-sale Securities, Unrealized Gains 818 196
Available-for-sale Securities, Unrealized Losses (158) (1,376)
Available-for-sale securities, Fair Value 148,305 152,379
US Government Agency Obligations [Member]    
Securities [Line Items]    
Held-to-maturity Securities, Amortized Cost 8,098 7,973
Held-to-maturity Securities, Unrealized Gains 521 320
Held-to-maturity Securities, Fair Value 8,619 8,293
Available-for-sale Securities, Amortized Cost 54,442 58,460
Available-for-sale Securities, Unrealized Gains 223  
Available-for-sale Securities, Unrealized Losses   (252)
Available-for-sale securities, Fair Value 54,665 58,208
Government Sponsored Entities (GSE) Mortgage-Backed Securities [Member]    
Securities [Line Items]    
Held-to-maturity Securities, Amortized Cost 2,459 2,759
Held-to-maturity Securities, Unrealized Gains 108 83
Held-to-maturity Securities, Fair Value 2,567 2,842
Available-for-sale Securities, Amortized Cost 48,290 40,663
Available-for-sale Securities, Unrealized Gains 425 13
Available-for-sale Securities, Unrealized Losses (1) (325)
Available-for-sale securities, Fair Value 48,714 40,351
Corporate Bonds [Member]    
Securities [Line Items]    
Held-to-maturity Securities, Amortized Cost 12,887 11,518
Held-to-maturity Securities, Unrealized Gains 398 234
Held-to-maturity Securities, Unrealized Losses (7) (42)
Held-to-maturity Securities, Fair Value 13,278 11,710
Available-for-sale Securities, Amortized Cost 17,877 20,921
Available-for-sale Securities, Unrealized Gains 90  
Available-for-sale Securities, Unrealized Losses (90) (350)
Available-for-sale securities, Fair Value 17,877 20,571
Collateralized Mortgage Obligations GSE [Member]    
Securities [Line Items]    
Held-to-maturity Securities, Amortized Cost 2,300 2,623
Held-to-maturity Securities, Unrealized Gains 43 9
Held-to-maturity Securities, Unrealized Losses   (26)
Held-to-maturity Securities, Fair Value 2,343 2,606
Available-for-sale Securities, Amortized Cost 14,706 16,241
Available-for-sale Securities, Unrealized Gains 56 3
Available-for-sale Securities, Unrealized Losses (64) (438)
Available-for-sale securities, Fair Value 14,698 15,806
State And Municipal Taxable [Member]    
Securities [Line Items]    
Held-to-maturity Securities, Amortized Cost 1,009  
Held-to-maturity Securities, Unrealized Gains 41  
Held-to-maturity Securities, Fair Value 1,050  
State and Municipal Tax-Exempt [Member]    
Securities [Line Items]    
Held-to-maturity Securities, Amortized Cost 48,082 42,956
Held-to-maturity Securities, Unrealized Gains 464 300
Held-to-maturity Securities, Unrealized Losses   (276)
Held-to-maturity Securities, Fair Value 48,546 42,980
Available-for-sale Securities, Amortized Cost 12,330 17,274
Available-for-sale Securities, Unrealized Gains 24 180
Available-for-sale Securities, Unrealized Losses (3) (11)
Available-for-sale securities, Fair Value $ 12,351 $ 17,443