Parent Corporation Only Financial Statements (Schedule of Condensed Balance Sheet) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
ASSETS
Cash and cash equivalents	$ 82,692	$ 104,134
Securities available for sale	323,070	496,815
Other assets	10,414	4,516
Total assets	1,673,082	1,629,765
LIABILITIES AND STOCKHOLDERS' EQUITY
Subordinated debentures	5,155	5,155
Total liabilities and stockholders' equity	1,673,082	1,629,765
Parent Company [Member]
ASSETS
Cash and cash equivalents	285	629
Investment in subsidiaries	173,658	165,351
Securities available for sale	442	543
Other assets	271	41
Total assets	174,656	166,564
LIABILITIES AND STOCKHOLDERS' EQUITY
Other liabilities	917	718
Subordinated debentures	5,155	5,155
Stockholders' equity	168,584	160,691
Total liabilities and stockholders' equity	$ 174,656	$ 166,564