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Stock-based Payment Arrangements (Tables) | 12 Months Ended
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Dec. 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Assumptions Made to Estimate Fair Value | The following assumptions were made in estimating 2013 fair values:
Expected dividends |  |  | 1.5 | %
Expected volatility |  |  | 32.42 | %
Risk-free interest rate |  |  | 1.7 | %
Expected term (in years) |  |  | 6.5 |
Summary of Stock Option Activity | The following table represents stock option activity for the year ended December 31, 2013.
Options |  | Number of Options |  |  | Weighted- Average Exercise Price |  |  | Weighted- Average Grant Date Fair Value |  |  | Weighted- Average Remaining Contractual Term (Years) |  |  | Aggregate Intrinsic Value |
Outstanding as of January 1, 2013 |  |  | 850,520 |  |  | $ | 11.84 |  |  | $ | 3.89 |  |  |  |  |  |  |  |  |
Granted |  |  | 17,500 |  |  |  | 17.67 |  |  |  | 5.18 |  |  |  |  |  |  |  |  |
Exercised |  |  | (7,900 | ) |  |  | 11.53 |  |  |  | 3.79 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (10,100 | ) |  |  | 15.25 |  |  |  | 5.23 |  |  |  |  |  |  |  |  |
Outstanding as of December 31, 2013 |  |  | 850,020 |  |  | $ | 11.92 |  |  | $ | 3.90 |  |  |  | 5.7 |  |  | $ | 5,889,000 |
Exercisable as of December 31, 2013 |  |  | 631,484 |  |  | $ | 11.58 |  |  | $ | 3.79 |  |  |  | 5.4 |  |  | $ | 4,593,000 |
Unvested Restricted Stock Activity | The following table represents unvested restricted stock activity in the RRP for the year ended December 31, 2013.
|  | Number of Shares |  |  | Weighted- Average Grant Date Fair Value |
Balance, beginning of year |  |  | 144,840 |  |  | $ | 11.83 |
Granted |  |  | 8,000 |  |  |  | 17.54 |
Forfeited |  |  | (3,900 | ) |  |  | 15.50 |
Released |  |  | (68,920 | ) |  |  | 11.63 |
Balance, end of period |  |  | 80,020 |  |  | $ | 12.39 |

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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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