Condensed Consolidated Statements of Financial Condition (Parenthetical) (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Statement of Financial Position [Abstract]
Investment securities held to maturity	$ 35,509	$ 11,010
Allowance for loan losses, purchased covered loans receivable	5,972	4,352
Purchased non-covered loans receivable	5,426	5,117
Other real estate owned, covered by FDIC loss share	$ 317	$ 260
Preferred stock, par value (in usd per share)	$ 0	$ 0
Preferred stock, shares authorized	2,500,000	2,500,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in usd per share)	$ 0	$ 0
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	16,210,872	15,117,980
Common stock, shares outstanding	16,210,872	15,117,980