Acquisitions Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Combinations [Abstract]
Net interest and other income	$ 122,426	$ 110,727	$ 84,988
Net income	$ 25,862	$ 20,428	$ 11,123
Basic earnings per share (in dollars per share)	$ 1.22	$ 0.95	$ 0.54
Diluted earnings per share (in dollars per share)	$ 1.20	$ 0.94	$ 0.52