XML 74 R36.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Stock-Based Compensation (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2011
Stock-Based Compensation [Abstract] |
Summarizes Information Related To Restricted Stock |
|  |  | September 30, |  |  |  | September 30, |
|  | Shares |  |  | Weighted Average Grant Date Fair Value |
Non-vested shares outstanding at December 31, 2009 |  |  | — |  |  |  | — |
Granted |  |  | 240,345 |  |  | $ | 16.16 |
Vested |  |  | — |  |  |  | — |
Forfeited |  |  | — |  |  |  | — |
Non-vested shares outstanding at December 31, 2010 |  |  | 240,345 |  |  | $ | 16.16 |
Granted |  |  | 248,228 |  |  |  | 30.99 |
Vested |  |  | (92,115 | ) |  |  | 16.24 |
Forfeited |  |  | (5,180 | ) |  |  | 27.40 |
Non-vested shares outstanding at December 31, 2011 |  |  | 391,278 |  |  | $ | 25.40 |

X
- Details
Name: | us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
Name: | us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration