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Capital Transactions (Details) - USD ($) |  |  | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
May 10, 2016 | Feb. 25, 2016 | Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015 | Dec. 31, 2015 | Nov. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Cash dividend per common share (in dollars per share) | $ 0.10 | $ 0.10 | $ 0.10 | $ 0.10 | $ 0.2 | $ 0.2 |  |
Payments of cash dividends | $ 1,900,000 | $ 1,900,000 |  |  | $ 3,756,000 | $ 3,740,000 |  |
Weighted Average Exercise Price Per Share |  |  |  |  |  |  |  |
Granted (in dollars per share) |  |  |  |  | $ 0.00 |  |  |
Stock options |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Exercisable (in shares) |  |  | 1,141,000 |  | 1,141,000 |  | 958,000 |
Expected to vest (in shares) |  |  | 377,000 |  | 377,000 |  | 588,000 |
Aggregate Intrinsic value, outstanding |  |  | $ 600,000 |  | $ 600,000 |  | $ 900,000 |
Aggregate Intrinsic value, exercisable |  |  | 600,000 |  | 600,000 |  | 900,000 |
Aggregate intrinsic values of options exercised |  |  |  |  | 200,000 | 1,400,000 |  |
Aggregate Intrinsic value, expected to vest |  |  | $ 0 |  | 0 |  | 0 |
Tax benefit from the exercise of stock options |  |  |  | $ 100,000 | $ 100,000 | $ 500,000 |  |
Number of shares |  |  |  |  |  |  |  |
Options outstanding at the beginning of the period (in shares) |  |  |  |  | 1,683,000 |  |  |
Granted (in shares) |  |  |  |  | 0 |  |  |
Forfeited or canceled (in shares) |  |  |  |  | (59,000) |  |  |
Exercised (in shares) |  |  |  |  | (25,000) | (373,000) |  |
Options outstanding at the end of the period (in shares) |  |  | 1,599,000 |  | 1,599,000 |  |  |
Weighted Average Exercise Price Per Share |  |  |  |  |  |  |  |
Options outstanding at the beginning of the period (in dollars per share) |  |  |  |  | $ 12.21 |  |  |
Forfeited or canceled (in dollars per share) |  |  |  |  | 11.77 |  |  |
Exercised (in dollars per share) |  |  |  |  | 2.35 | $ 9.58 |  |
Options outstanding at the end of the period (in dollars per share) |  |  | $ 12.39 |  | $ 12.39 |  |  |
Performance based stock options operating income margins |  |  |  |  |  |  |  |
Share-based compensation, additional disclosures |  |  |  |  |  |  |  |
Operating income margin, one (as a percent) |  |  |  |  | 6.00% |  |  |
Operating income margin, two (as a percent) |  |  |  |  | 8.00% |  |  |
Operating income margin, three (as a percent) |  |  |  |  | 10.00% |  |  |
Performance based stock options sales and operating income margins |  |  |  |  |  |  |  |
Share-based compensation, additional disclosures |  |  |  |  |  |  |  |
Vesting period |  |  |  |  | 2 years |  |  |
Performance based stock options sales and operating income margins | Minimum |  |  |  |  |  |  |  |
Share-based compensation, additional disclosures |  |  |  |  |  |  |  |
Operating income margin, two (as a percent) |  |  |  |  | 8.00% |  |  |
Performance based stock options sales |  |  |  |  |  |  |  |
Share-based compensation, additional disclosures |  |  |  |  |  |  |  |
Vesting period based on achieving annual net sales targets |  |  |  |  | 1 year |  |  |
Performance based stock options sales | Maximum |  |  |  |  |  |  |  |
Share-based compensation, related information |  |  |  |  |  |  |  |
Potential compensation expense |  |  | $ 400,000 |  | $ 400,000 |  |  |
Time-based stock options |  |  |  |  |  |  |  |
Share-based compensation, related information |  |  |  |  |  |  |  |
Share-based compensation expense |  |  | 200,000 | $ 200,000 | 400,000 | $ 700,000 |  |
Unrecognized share-based compensation expense |  |  | $ 600,000 |  | $ 600,000 |  | $ 1,100,000 |
Weighted-average period over which the remaining compensation cost is expected to be recognized |  |  |  |  | 1 year 3 months |  |  |
Time-based stock options | Maximum |  |  |  |  |  |  |  |
Share-based compensation, additional disclosures |  |  |  |  |  |  |  |
Vesting period |  |  |  |  | 48 months |  |  |
2012 Stock Incentive Plan |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of shares authorized under the plan |  |  |  |  |  |  | 1,500,000 |
Additional number of shares authorized under the plan |  |  |  | 1,500,000 |  |  |  |
2009 Incentive Plan | Maximum |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of shares authorized under the plan |  |  | 400,000 |  | 400,000 |  |  |
2014 Share Repurchase Program |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Stock repurchase program, authorized amount |  |  |  |  |  |  |  | $ 20,000,000
Remaining balance available for repurchases |  |  | $ 13,400,000 |  | $ 13,400,000 |  |  |
Repurchase of common stock (in shares) |  |  |  |  | 0 |  |  |

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