Deferred Compensation Plan	3 Months Ended
Deferred Compensation Plan	Mar. 31, 2013
Deferred Compensation Plan [Abstract]
Deferred Compensation Plan	Deferred Compensation Plan On March 10, 2010, the Company established the Restricted Debt Unit Plan (the “RDU Plan”), an unfunded nonqualified deferred compensation plan. The total number of RDUs that can be granted under the RDU Plan is 28,500. As of March 31, 2013, 26,499 RDUs were outstanding. Compensation expense of $2.1 million related to the RDU Plan was recognized in both the three months ended March 31, 2013 and 2012. As of March 31, 2013, total unrecognized compensation expense of $15.6 million related to the RDU Plan is expected to be recognized over the next 1.8 years. At March 31, 2013 and December 31, 2012, the Company had $17.6 million and $15.5 million of liabilities related to the RDU Plan recorded on the consolidated balance sheets, respectively.

The entire disclosure for compensation costs, including compensated absences accruals, compensated absences liability, deferred compensation arrangements and income statement compensation items. Deferred compensation arrangements may include a description of an arrangement with an individual employee, which is generally an employment contract between the entity and a selected officer or key employee containing a promise by the employer to pay certain amounts at designated future dates, usually including a period after retirement, upon compliance with stipulated requirements. This type of arrangement is distinguished from broader based employee benefit plans as it is usually tailored to the employee. Disclosure also typically includes the amount of related compensation expense recognized during the reporting period, the number of shares (units) issued during the period under such arrangements, and the carrying amount as of the balance sheet date of the related liability.

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