Stock-Based Compensation (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Approved and authorized maximum number of shares to be issued	3,000,000		3,000,000
Compensation expense related to stock based awards outstanding	$ 315,000	$ 501,000	$ 1,100,000	$ 1,600,000
Exercise of stock options, shares	75,783	38,507	130,705	135,607
Proceeds received upon exercise of stock options	454,000	231,000	794,000	737,000
Total unrecognized compensation expense	$ 1,400,000		$ 1,400,000
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
Minimum | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, vesting period			3 years
Maximum | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, vesting period			5 years