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Shareholders' Equity (Tables) | 9 Months Ended
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Sep. 30, 2015
Stockholders' Equity Note [Abstract] |
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block] | The Company recognized stock-based compensation expense in its Consolidated Financial Statements in the three and nine months ended September 30, 2015 and 2014, respectively, as follows:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2015 |  | 2014 |  | 2015 |  | 2014
Stock-based compensation expense | $ | 3,867 |  |  | $ | 3,786 |  |  | $ | 11,476 |  |  | $ | 9,481 |
Less: Deferred tax benefit | (1,425 | ) |  | (1,322 | ) |  | (4,084 | ) |  | (3,272 | )
Stock-based compensation expense, net of tax | $ | 2,442 |  |  | $ | 2,464 |  |  | $ | 7,392 |  |  | $ | 6,209 |

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- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. + 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 (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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