Securities (Schedule of Contractual Maturities of Securities) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Available for Sale, Amortized Cost
Available for Sale, Amortized Cost, Due in one year or less
Available for Sale, Amortized Cost, Due after one year to five years	36,382
Available for Sale, Amortized Cost, Due after five to ten years	74,283
Available for Sale, Amortized Cost, Due after ten years	226,659
Available for Sale, Amortized Cost, Total debt securities	337,324
Available for Sale, Amortized Cost, Marketable equity securities	11,182
Available for Sale, Amortized Cost, Total	348,506	360,317
Available for Sale, Fair Value
Available for Sale, Fair Value, Due in one year or less
Available for Sale, Fair Value, Due after one year to five years	37,193
Available for Sale, Fair Value, Due after five to ten years	72,842
Available for Sale, Fair Value, Due after ten years	226,543
Available for Sale, Fair Value, Net debt securities	336,578
Available for Sale, Fair Value, Marketable equity securities	11,680
Available for sale Securities, Fair Value, Total	348,258	356,862
Held to Maturity, Amortized Cost
Held to Maturity, Amortized Cost, Due in one year or less	255
Held to Maturity, Amortized Cost, Due after one year to five years	5,821
Held to Maturity, Amortized Cost, Due after five to ten years	27,163
Held to Maturity, Amortized Cost, Due after ten years	342,317
Held to Maturity, Amortized Cost, Net debt securities	375,556	350,652
Held to Maturity, Amortized Cost, Marketable equity securities
Held to Maturity, Amortized Cost, Net	375,556	350,652
Held to Maturity, Fair Value
Held to Maturity, Fair Value, Due in one year or less	256
Held to Maturity, Fair Value, Due after one year to five years	6,071
Held to Maturity, Fair Value, Due after five to ten years	27,354
Held to Maturity, Fair Value, Due after ten years	340,849
Held to Maturity, Fair Value, Total	374,530	346,455
Held to Maturity, Fair Value, Marketable equity securities