Stock-Based Compensation (Details 1) - Jun. 30, 2015 - Non Qualified Stock Option [Member] - USD ($) $ / shares in Units, $ in Thousands	Total
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Outstanding at December 31, 2013, Number of options (shares)	229,150
Granted, Number of options (shares)	0
Exercised, Number of options (shares)	(36,000)
Forfeited, Number of options (shares)	(300)
Expired, Number of options (shares)	0
Outstanding at June 30, 2014, Number of options (shares)	192,850
Exercisable at June 30, 2014, Number of options (shares)	139,850
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Outstanding at December 31, 2013, Weighted average exercise price (usd per share)	$ 11.54
Granted, Weighted average exercise price (usd per share)	0.00
Exercised, Weighted average exercise price (usd per share)	10.95
Forfeited, Weighted average exercise price (usd per share)	13.17
Expired, Weighted average exercise price (usd per share)	0.00
Outstanding at June 30, 2014, Weighted average exercise price (usd per share)	11.64
Exercisable at June 30, 2014, Weighted average exercise price (usd per share)	$ 10.49
Outstanding at June 30, 2014, Weighted average remaining contractual term	1 year 4 months 20 days
Exercisable at June 30, 2014, Weighted average remaining contractual term	1 year 1 month 27 days
Outstanding at June 30, 2014, Aggregate intrinsic value	$ 4,165
Exercisable at June 30, 2014, Aggregate intrinsic value	$ 3,182