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Stock-Based Compensation | 6 Months Ended
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Jun. 30, 2011
Stock-Based Compensation [Abstract] |
Stock-Based Compensation | 14. Stock-Based Compensation The following table presents the components of Stock-Based Compensation Expense for the three and six months ended June 30, 2011 and 2010:
|  | Three Months Ended |  |  | Six Months Ended |
|  | June 30 |  |  | June 30 |
|  | 2011 |  |  | 2010 |  |  | 2011 |  |  | 2010 |
Stock options and stock appreciation rights |  | $ | 570 |  |  | $ | 626 |  |  | $ | 1,077 |  |  | $ | 886 |
Restricted share awards |  |  | 257 |  |  |  | 224 |  |  |  | 504 |  |  |  | 420 |
Performance share awards |  |  | 388 |  |  |  | 222 |  |  |  | 694 |  |  |  | 263 |
Share-based liabilities |  |  | (24 | ) |  |  | (64 | ) |  |  | 215 |  |  |  | 110 |
Total Stock-Based Compensation Expense |  | $ | 1,191 |  |  | $ | 1,008 |  |  | $ | 2,490 |  |  | $ | 1,679 |
During the first six months of 2011 we granted 27,665 restricted shares. The weighted average grant date fair value of each share awarded was $40.35. Restricted share awards generally have a three year vesting period from the effective date of the grant. The total fair value of shares vested during the six months ended June 30, 2011 and 2010 was $623 and $67, respectively.

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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 4 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 93-6 -Paragraph 53 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64, 65, A240 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: 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 6: 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 7: 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 8: 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 + Details
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