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Capital Transactions (Details 2) (USD $) In Thousands, except Per Share data, unless otherwise specified | 0 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended |  | 9 Months Ended |  | 9 Months Ended
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Sep. 19, 2013 Stock options | Aug. 29, 2013 Stock options | Sep. 30, 2014 Stock options | Sep. 30, 2014 Time-based stock options | Sep. 30, 2013 Time-based stock options | Sep. 30, 2014 Time-based stock options | Sep. 30, 2013 Time-based stock options | Dec. 31, 2013 Time-based stock options | Sep. 30, 2014 Time-based stock options Maximum | Sep. 30, 2014 Performance based stock options operating income margins | Sep. 30, 2014 Performance based stock options sales and operating income margins | Sep. 30, 2014 Performance based stock options sales and operating income margins Minimum | Sep. 30, 2014 Performance based stock options sales | Sep. 30, 2014 Performance based stock options sales Maximum | Sep. 30, 2014 2012 Stock Incentive Plan Time-based stock options
Number of shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options outstanding at the beginning of the period (in shares) |  |  | 1,926 |  |  |  |  |  |  |  |  |  |  |  |
Granted (in shares) |  |  | 258 |  |  |  |  |  |  |  |  |  |  |  | 258
Expired (in shares) |  |  | (18) |  |  |  |  |  |  |  |  |  |  |  |
Exercised (in shares) |  |  | (44) |  |  |  |  |  |  |  |  |  |  |  |
Options outstanding at the end of the period (in shares) |  |  | 2,122 |  |  |  |  |  |  |  |  |  |  |  |
Weighted Average Exercise Price Per Share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options outstanding at the beginning of the period (in dollars per share) |  |  | $ 12.54 |  |  |  |  |  |  |  |  |  |  |  |
Granted (in dollars per share) |  |  | $ 15.38 |  |  |  |  |  |  |  |  |  |  |  | $ 15.38
Expired (in dollars per share) |  |  | $ 13.55 |  |  |  |  |  |  |  |  |  |  |  |
Exercised (in dollars per share) |  |  | $ 7.32 |  |  |  |  |  |  |  |  |  |  |  |
Options outstanding at the end of the period (in dollars per share) |  |  | $ 12.97 |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation, additional disclosures |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period |  |  |  |  |  |  |  |  | 48 months |  | 2 years |  |  |  |
Operating income margin, one (as a percent) |  |  |  |  |  |  |  |  |  | 6.00% |  |  |  |  |
Operating income margin, two (as a percent) |  |  |  |  |  |  |  |  |  | 8.00% |  | 8.00% |  |  |
Operating income margin, three (as a percent) |  |  |  |  |  |  |  |  |  | 10.00% |  |  |  |  |
Period of time during which operating income margins must be achieved in order to vest in performance based stock options |  |  |  |  |  |  |  |  |  | 12 months |  |  |  |  |
Consecutive period of time used to assess operating income margins which determine vesting |  |  |  |  |  |  |  |  |  | 15 months |  |  |  |  |
Vesting period based on achieving annual net sales targets |  |  |  |  |  |  |  |  |  |  |  |  | 1 year |  |
Expiration period |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 years
Weighted-average assumptions used to calculate fair value of options granted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average grant date fair value (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 6.53
Expected life |  |  | 6 years |  |  |  |  |  |  |  |  |  |  |  |
Risk-free interest rate (as a percent) |  |  | 1.50% |  |  |  |  |  |  |  |  |  |  |  |
Expected volatility (as a percent) |  |  | 56.70% |  |  |  |  |  |  |  |  |  |  |  |
Dividend yield (as a percent) |  |  | 2.60% |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation, related information |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Special one-time cash dividend paid per common share (in dollars per share) | $ 1.50 | $ 1.50 |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation expense |  |  |  | $ 691 | $ 620 | $ 2,307 | $ 2,423 |  |  |  |  |  |  |  |
Related tax benefit |  |  |  | 273 | 245 | 911 | 957 |  |  |  |  |  |  |  |
Unrecognized share-based compensation expense |  |  |  | 2,627 |  | 2,627 |  | 3,294 |  |  |  |  |  |  |
Weighted-average period over which the remaining compensation cost is expected to be recognized |  |  |  |  |  | 1 year 9 months 18 days |  |  |  |  |  |  |  |  |
Potential compensation expense |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 800 |

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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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