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Stockholders' Equity and Stock Based Compensation (Details) (2006 Plan)
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12 Months Ended | |||||||
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Jun. 30, 2012
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Dec. 31, 2011
Restricted stock
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Dec. 31, 2010
Restricted stock
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Dec. 31, 2009
Restricted stock
item
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Dec. 31, 2008
Restricted stock
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Dec. 31, 2007
Restricted stock
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Dec. 31, 2006
Restricted stock
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Dec. 31, 2006
Restricted stock
CEO
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| Stock-based compensation | ||||||||
| Number of shares of Common Stock initially available for award | 800,000 | |||||||
| Number of shares of Common Stock available for future award grants | 122,250 | |||||||
| Stock granted (in shares) | 15,000 | 150,500 | 140,000 | 57,500 | 30,000 | 315,000 | 200,000 | |
| Vesting period | 60 months | 60 months | 60 months | 60 months | 60 months | 120 months | ||
| Forfeited (in shares) | 8,375 | 5,875 | 3,500 | 12,500 | ||||
| Number of equal quarterly installments for vesting of awards | 20 | |||||||
| X | ||||||||||
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- Definition
Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Represents the number of equal quarterly installments for vesting of awards. No definition available.
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