Earnings Per Share (Earnings Per Share) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income (numerator) [Abstract]
Basic earnings per share, Net income available to common shareholders	$ 4,788	$ 3,561	$ 17,786	$ 11,387
Diluted earnings per share, Net income available to common shareholders	$ 4,788	$ 3,561	$ 17,786	$ 11,387
Shares (denominator) [Abstract]
Basic earnings per share, Net income available to common shareholders (in shares)	37,440,838	33,105,194	37,359,230	33,101,281
Effect of dilutive securities, Common stock options (in shares)	842,479	67,658	618,878	32,026
Diluted earnings per share, Net income available to common shareholders (in shares)	38,283,317	33,172,852	37,978,108	33,133,307
Per share amount [Abstract]
Basic earnings per share, Net income available to common shareholders (in dollars per share)	$ 0.13	$ 0.11	$ 0.48	$ 0.34
Effect of dilutive securities, Common stock options (in dollars per share)			$ (0.01)
Diluted earnings per share, Net income available to common shareholders (in dollars per share)	$ 0.13	$ 0.11	$ 0.47	$ 0.34