Consolidated Balance Sheets (Parenthetical) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Time certificates of deposit least amount	$ 100,000	$ 100,000
Securities held to maturity, fair value	$ 478,749,000	$ 379,699,000
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	75,000,000	75,000,000
Common stock, shares issued	26,236,352	23,998,738
Common stock, unvested restricted Stock awards	230,900	254,500
Shares held in rabbit trust at cost	173,378	176,849
Common Stock Outstanding
Common stock, shares outstanding	26,236,352	23,998,738