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Stock-Based Compensation | 6 Months Ended
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Jun. 30, 2013
Stock-Based Compensation [Abstract] |
Stock-Based Compensation | Note 8 - Stock-Based Compensation The Amended and Restated Omnibus Stock and Performance Compensation Plan (the "Omnibus Plan") permits the issuance of up to 1,500,000 shares of the Company's common stock in the form of stock options, stock appreciation rights ("SARs"), restricted stock, restricted stock units and performance awards. The Company issues shares out of treasury stock for these awards. During the six months ended June 30, 2013, 29,918 restricted shares and 85,943 SARs were granted under the Omnibus Plan. Restricted Stock Restricted shares granted prior to April 16, 2013 are amortized to expense over the three-year vesting period. Beginning on April 16, 2013, restricted shares granted to Company employees are amortized to expense over the three-year vesting period whereas restricted shares granted to members of the Board of Directors are amortized to expense over a one-year service period with the exception of those shares granted in lieu of cash payment for retainer fees which are expensed in the period earned. As of June 30, 2013, the total unrecognized compensation expense related to non-vested common stock was $1,780,000, and the related weighted-average period over which it is expected to be recognized is approximately 1.1 years. Following is a summary of the activity of the restricted stock:
| Six Months Ended
| June 30, 2013
| Shares |  | Fair Value
Balance at December 31, 2012 | 54,875 |  |  | $ | 31.61
Granted | 29,918 |  |  | $ | 41.90
Vested | (25,608 | ) |  | $ | 30.48
Balance at June 30, 2013 | 59,185 |  |  | $ | 37.30
SARs SARs vest over a three-year period, with one-third of the shares vesting and becoming exercisable each year on the anniversary date of the grant, and they expire 10 years from the original grant date. As of June 30, 2013, the total unrecognized compensation expense was $1,351,000, and the related weighted-average period over which it is expected to be recognized is 1.7 years. Following is a summary of the activity of the Company's SARs program for the six-month period ended June 30, 2013:
|  |  |  | Weighted- |  | Average |  | Aggregate
|  |  |  | Average |  | Remaining |  | Intrinsic
|  |  |  | Exercise |  | Contractual |  | Value
| Shares |  | Price |  | Term Years |  | (In thousands)
Outstanding at December 31, 2012 | 351,881 |  |  | $ | 27.52 |  | 7.34 |  | $ | 4,988
Granted | 85,943 |  |  | $ | 42.14 |  |  |  |  |
Exercised | (28,270 | ) |  | $ | 23.92 |  |  |  |  |
Outstanding at June 30, 2013 | 409,554 |  |  | $ | 30.84 |  | 7.44 |  | $ | 6,251
Exercisable at June 30, 2013 | 232,426 |  |  | $ | 26.06 |  | 6.24 |  | $ | 4,658
Following is a summary of the activity of the non-vested SARs during the six-month period ended June 30, 2013:
|  |  |  | Weighted-Average
| Shares |  | Grant Date Fair Value
Non-vested at December 31, 2012 | 161,294 |  |  | $ | 31.70
Granted | 85,943 |  |  | $ | 42.14
Vested | (70,109 | ) |  | $ | 30.85
Non-vested at June 30, 2013 | 177,128 |  |  | $ | 37.11
The Company uses the Black-Scholes pricing model to determine the fair value of the SARs at the date of grant. Following are the assumptions used to estimate the per-share fair value of SARs granted:
| Six Months Ended June 30,
| 2013 |  | 2012
Risk-free interest rate | 1.29% |  | 1.38%
Expected life | 7 yrs. |  | 7 yrs.
Expected volatility | 28.72% |  | 29.39%
Expected dividend yield | 1.71% |  | 1.84%
The risk-free interest rate is based on the zero-coupon U.S. Treasury yield for the period equal to the expected life of the SARs at the time of the grant. The expected life was derived using the historical exercise activity. The Company uses historical volatility for a period equal to the expected life of the rights using average monthly closing market prices of the Company's stock as reported on The Nasdaq Global Market. The expected dividend yield is based on the Company's current rate of annual dividends.

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6406099&loc=d3e25284-112666 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 + Details
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