Stock-Based Compensation (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	May. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Approved and authorized maximum number of shares to be issued					3,000,000
Compensation expense related to stock based awards outstanding	$ 439,000	$ 315,000	$ 1,700,000	$ 1,100,000
Exercise of stock options (shares)	0	75,783	3,970	130,705
Proceeds received upon exercise of stock options	$ 0	$ 454,000	$ 28,000	$ 794,000
Total unrecognized compensation expense	$ 2,900,000		$ 2,900,000
Share-based compensation cost not yet recognized, period for recognition			2 years
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, expiration period			10 years
Stock options | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, vesting period			3 years
Stock options | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, vesting period			5 years