Credit Facility	12 Months Ended
Dec. 31, 2011
Line of Credit Facility [Abstract]
Credit Facility	9. CREDIT FACILITY Effective on August 9, 2005, the Company entered into a revolving credit facility (the “Credit Facility”) with a group of financial institutions. Effective September 27, 2006, the Company entered into an amendment and restatement of its Credit Facility (the “Amendment”). The Amendment decreased the overall range of interest rates the Company paid on amounts outstanding on the Credit Facility and lowered the facility fee. In addition, the Amendment extended the term of the Credit Facility until September 27, 2011. The Credit Facility, as amended, provided for a revolving line of credit in the aggregate amount of $100.0 million, subject to continued covenant compliance. The Credit Facility, as amended, bore interest at the London Interbank Offered Rate (“LIBOR”) plus 0.32% and adjusted in the range of 0.32% to 0.80% above LIBOR based on the level of the Company’s total debt and its adjusted earnings before interest, taxes, depreciation and amortization (“EBITDA”) as defined in the agreement. In addition, the Company was required to pay a quarterly facility fee ranging from 0.08% to 0.20% based on the aggregate amount available under the Credit Facility, as amended, and the level of the Company’s total debt and its adjusted EBITDA. The Company did not renew the credit facility and it expired on September 27, 2011. Upon expiration, there was no indebtedness outstanding under the Credit Facility.

9. CREDIT FACILITY

Effective on August 9, 2005, the Company entered into a revolving credit facility (the “Credit Facility”) with a group of financial institutions. Effective September 27, 2006, the Company entered into an amendment and restatement of its Credit Facility (the “Amendment”). The Amendment decreased the overall range of interest rates the Company paid on amounts outstanding on the Credit Facility and lowered the facility fee. In addition, the Amendment extended the term of the Credit Facility until September 27, 2011. The Credit Facility, as amended, provided for a revolving line of credit in the aggregate amount of $100.0 million, subject to continued covenant compliance. The Credit Facility, as amended, bore interest at the London Interbank Offered Rate (“LIBOR”) plus 0.32% and adjusted in the range of 0.32% to 0.80% above LIBOR based on the level of the Company’s total debt and its adjusted earnings before interest, taxes, depreciation and amortization (“EBITDA”) as defined in the agreement. In addition, the Company was required to pay a quarterly facility fee ranging from 0.08% to 0.20% based on the aggregate amount available under the Credit Facility, as amended, and the level of the Company’s total debt and its adjusted EBITDA. The Company did not renew the credit facility and it expired on September 27, 2011. Upon expiration, there was no indebtedness outstanding under the Credit Facility.