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Treasury Stock and Share Based Awards (Tables) | 3 Months Ended
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Mar. 31, 2014
Summary of Treasury Stock Activity | Below is a summary of the Company’s treasury stock activity for the three months ended March 31, 2014:
|  | Number of |  |  |  |
|  | Treasury |  |  |  |
|  | Shares |  |  | Cost |
Balance at January 1, 2014 |  |  | 3,694,935 |  |  | $ | 51,946 |
Restricted stock withholdings (1) |  |  | 333,507 |  |  |  | 9,776 |
Restricted stock forfeitures |  |  | 786 |  |  |  | — |
Balance at March 31, 2014 |  |  | 4,029,228 |  |  | $ | 61,722 |
(1) | The Company withheld restricted shares as a result of the election by certain employees to satisfy their tax liabilities upon vesting in restricted stock and restricted stock units. The Company determined the number of shares to be withheld based upon market values ranging from $28.84 to $30.75 per share.
Summary of Restricted Stock Activity | Below is a summary of restricted stock activity for the three months ended March 31, 2014:
|  | Shares of |  |  | Weighted Average |
|  | Restricted |  |  | Grant Date |
|  | Stock |  |  | Fair Value |
Outstanding at January 1, 2014 |  |  | 1,260,913 |  |  | $ | 21.85 |
Granted |  |  | 234,813 |  |  | $ | 28.54 |
Vested |  |  | (586,955 | ) |  | $ | 20.04 |
Forfeited |  |  | (786 | ) |  | $ | 23.36 |
Outstanding at March 31, 2014 |  |  | 907,985 |  |  | $ | 24.75 |
Unvested restricted stock at March 31, 2014 |  |  | 907,985 |  |  | $ | 24.75 |
Summary of Potential Number of Shares Vesting under Restricted Stock Unit Awards | Below is a table summarizing the potential number of shares that could vest under restricted stock unit awards granted during the three months ended March 31, 2014 at each of the three target levels of financial performance (excluding forfeiture assumptions):
|  | Number of |  |  |  |
|  | Shares |  |  | Value at |
|  | Vesting |  |  | Grant |
at IRR of at least 8.5% |  |  | 65,832 |  |  | $ | 1,879 |
at IRR of at least 10.5% |  |  | 131,683 |  |  | $ | 3,758 |
at IRR of at least 12.5% |  |  | 197,515 |  |  | $ | 5,637 |

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- Definition Tabular disclosure of restricted stock units granted for current reporting period, at varying performance levels. + References No definition available. + Details
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- Definition Tabular disclosure of the changes in outstanding nonvested shares. + 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)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of treasury stock, including, but not limited to, average cost per share, description of share repurchase program, shares repurchased, shares held for each class of treasury stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23309-112656 + Details
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