Earnings Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Earnings Per Share [Abstract]
Net income	$ 3,068	[1]	$ 8,165	[1]	$ 6,594	[1]	$ 13,633	[1]
Less: earnings allocated to RSUs	(125)				(263)
Net income available to common shareholders	$ 2,943				$ 6,331
Average number of common shares outstanding	28,770		28,604		28,763		28,566
Potential dilutive shares	287				238
Average number of diluted shares outstanding	29,057		28,763		29,001		28,849
Basic	$ 0.10		$ 0.29		$ 0.22		$ 0.48
Diluted	$ 0.10		$ 0.28		$ 0.22		$ 0.47

[1] There is no material difference between net income and comprehensive income.