Condensed Consolidated Balance Sheets [Parenthetical] (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Invesment Securities held-to-maturity, estimated fair value (in dollars)	$ 1,398	$ 1,863
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	47,557,531	47,326,306
Common stock, shares outstanding	47,557,531	47,326,306