Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Time certificates of deposit least amount	$ 100,000	$ 100,000
Securities Held to Maturity, fair value	$ 374,530,000	$ 346,455,000
Preferred Stock, par value	$ 0.01	$ 0.01
Preferred Stock, shares authorized	1,000,000	1,000,000
Preferred Stock, shares outstanding
Common Stock, par value	$ 0.01	$ 0.01
Common Stock, shares authorized	75,000,000	75,000,000
Common Stock, shares issued	23,878,056	23,805,984
Common Stock, shares outstanding	23,878,056	23,805,984
Common Stock, unvested restricted Stock awards	284,453	268,290
Shares Held in Rabbi Trust	172,048	178,765