Stock-Based Compensation (Details 2)	12 Months Ended
	Dec. 31, 2016 $ / shares shares
Options Outstanding and Exercisable
Number Of Options (in shares) | shares	245,717
Weighted-Average Exercise Price (in dollars per share)	$ 19.82
Weighted-Average Remaining Contractual Term	4 years 4 months 24 days
Range Of Exercise Prices From Dollars 7.98 To 13.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price, low end of range (in dollars per share)	$ 7.98
Exercise price, high end of range (in dollars per share)	$ 13.00
Options Outstanding and Exercisable
Number Of Options (in shares) | shares	44,212
Weighted-Average Exercise Price (in dollars per share)	$ 12.72
Weighted-Average Remaining Contractual Term	1 year
Range Of Exercise Prices From Dollars 13.01 To 20.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price, low end of range (in dollars per share)	$ 13.01
Exercise price, high end of range (in dollars per share)	$ 20.00
Options Outstanding and Exercisable
Number Of Options (in shares) | shares	88,638
Weighted-Average Exercise Price (in dollars per share)	$ 17.41
Weighted-Average Remaining Contractual Term	4 years 9 months 18 days
Range Of Exercise Prices From Dollars 20.01 To 24.68 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price, low end of range (in dollars per share)	$ 20.01
Exercise price, high end of range (in dollars per share)	$ 24.68
Options Outstanding and Exercisable
Number Of Options (in shares) | shares	112,867
Weighted-Average Exercise Price (in dollars per share)	$ 24.48
Weighted-Average Remaining Contractual Term	5 years 4 months 24 days