Defined Contribution and 401(k) Plans	12 Months Ended
Defined Contribution and 401(k) Plans	Dec. 31, 2012
Postemployment Benefits [Abstract]
DEFINED CONTRIBUTION AND 401(k) PLANS	DEFINED CONTRIBUTION AND 401(k) PLANS Defined Contribution Plan The Company provides a noncontributory defined contribution retirement plan for all eligible U.S. employees. Total contributions were $2.1 million, $1.5 million and $1.0 million for the years ended December 31, 2012 , 2011, and 2010 respectively. 401(k) Plan The Company maintains a retirement savings plan (which qualifies under Section 401(k) of the U.S. Internal Revenue Code) covering all eligible U.S. employees. Under the plan, employees may elect to contribute up to 100% of their cash compensation, subject to ERISA limitations. The Company adopted a Safe Harbor Tiered Match and is required to make matching contributions equal to 100% of the employee’s contribution up to 3% of the employee’s compensation plus matching contributions equal to 50% of the employee’s contribution up to an additional 2% of the employee’s compensation. Total plan expenses recognized for the years ended December 31, 2012, 2011, and 2010 were $2.0 million, $1.4 million, and $0.9 million, respectively.

The entire disclosure for postemployment benefits, which may include supplemental unemployment benefits, obligations recognized for all types of benefits provided to former or inactive employees, their beneficiaries, and covered dependents after employment but before retirement. Disclosure may also include discussion that an obligation for postemployment benefits is not accrued in accordance with regulation only because the amount cannot be reasonably estimated.

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