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Capital Transactions (Details 2) (USD $) In Thousands, except Per Share data, unless otherwise specified | 0 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended |  | 6 Months Ended |  | 6 Months Ended
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Aug. 29, 2013 Employee Stock Option [Member] | Jun. 30, 2014 Employee Stock Option [Member] | Jun. 30, 2014 Time Based Stock Options [Member] | Jun. 30, 2013 Time Based Stock Options [Member] | Jun. 30, 2014 Time Based Stock Options [Member] | Jun. 30, 2013 Time Based Stock Options [Member] | Dec. 31, 2013 Time Based Stock Options [Member] | Jun. 30, 2014 Time Based Stock Options [Member] Maximum [Member] | Jun. 30, 2014 Performance Based Stock Options Vesting upon Achieving Operating Income Margins [Member] | Jun. 30, 2014 Performance Based Stock Options Vesting upon Achieving Sales and Operating Income Margins [Member] | Jun. 30, 2014 Performance Based Stock Options Vesting upon Achieving Sales and Operating Income Margins [Member] Minimum [Member] | Jun. 30, 2014 Performance Based Stock Options Vesting upon Achieving Sales [Member] | Jun. 30, 2014 Performance Based Stock Options Vesting upon Achieving Sales [Member] Maximum [Member] | Jun. 30, 2014 Incentive Plan 2012 [Member] Time Based Stock Options [Member]
Number of shares |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options outstanding at the beginning of the period (in shares) |  | 1,926 |  |  |  |  |  |  |  |  |  |  |  |
Granted (in shares) |  | 258 |  |  |  |  |  |  |  |  |  |  |  | 258
Expired (in shares) |  | (16) |  |  |  |  |  |  |  |  |  |  |  |
Exercised (in shares) |  | (24) |  |  |  |  |  |  |  |  |  |  |  |
Options outstanding at the end of the period (in shares) |  | 2,144 |  |  |  |  |  |  |  |  |  |  |  |
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) |  | $ 8.84 |  |  |  |  |  |  |  |  |  |  |  |
Options outstanding at the end of the period (in dollars per share) |  | $ 12.92 |  |  |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation expense |  |  | $ 719 | $ 729 | $ 1,618 | $ 1,803 |  |  |  |  |  |  |  |
Related tax benefit |  |  | 284 | 288 | 638 | 712 |  |  |  |  |  |  |  |
Unrecognized share-based compensation expense |  |  | 3,293 |  | 3,293 |  | 3,294 |  |  |  |  |  |  |
Weighted-average period over which the remaining compensation cost is expected to be recognized |  |  |  |  | 1 year 10 months 24 days |  |  |  |  |  |  |  |  |
Potential compensation expense |  |  |  |  |  |  |  |  |  |  |  |  | $ 800 |

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