Stock-Based Compensation (Details 1) - Non Qualified Stock Option [Member] $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Outstanding at December 31, 2015, Number of options (shares) | shares	67,550
Granted, Number of options (shares) | shares	0
Exercised, Number of options (shares) | shares	(29,850)
Forfeited, Number of options (shares) | shares	(100)
Expired, Number of options (shares) | shares	0
Outstanding at June 30, 2016, Number of options (shares) | shares	37,600
Exercisable at June 30, 2016, Number of options (shares) | shares	37,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Outstanding at December 31, 2015, Weighted average exercise price (usd per share) | $ / shares	$ 15.34
Granted, Weighted average exercise price (usd per share) | $ / shares	0.00
Exercised, Weighted average exercise price (usd per share) | $ / shares	13.73
Forfeited, Weighted average exercise price (usd per share) | $ / shares	19.38
Expired, Weighted average exercise price (usd per share) | $ / shares	0.00
Outstanding at June 30, 2016, Weighted average exercise price (usd per share) | $ / shares	16.61
Exercisable at June 30, 2016, Weighted average exercise price (usd per share) | $ / shares	$ 16.56
Outstanding at June 30, 2016, Weighted average remaining contractual term	5 months 5 days
Exercisable at June 30, 2016, Weighted average remaining contractual term	4 months 30 days
Outstanding at June 30, 2016, Aggregate intrinsic value | $	$ 327
Exercisable at June 30, 2016, Aggregate intrinsic value | $	$ 323