Bank Line	12 Months Ended
Dec. 31, 2011
Line of Credit Facility [Abstract]
Bank Line	Bank Line On September 30, 2010, the Company, the domestic subsidiaries of the Company (the “Guarantors”), Bank of America, N.A., as administrative agent and lender, and Union Bank, N.A., Wells Fargo Bank, N.A., Bank of the West, BBVA Compass Bank and US Bank, as lenders (together with the administrative agent, the “Lenders”), entered into a Credit Agreement (the “Agreement”). The Agreement provides the Company with a three-year unsecured revolving syndicated credit facility of $200,000 maturing on September 30, 2013. On August 24, 2011, the Company extended, with Lender's consent, the maturity date to September 30, 2014. The Company’s obligations under the Agreement are jointly and severally guaranteed by the Guarantors. Upon the occurrence of certain events of default specified in the Agreement, amounts due under the Agreement may be declared immediately due and payable. The Company may elect to borrow at either a Eurodollar Rate or a Base Rate (each as defined in the Agreement). Eurodollar Rate loans bear interest at an amount equal to the sum of a rate per annum calculated from the British Bankers Association London Interbank Offered Rate ("LIBOR") plus a designated percentage per annum (the “Applicable Rate”). The Applicable Rate for Eurodollar Rate loans is based on the Company’s consolidated total leverage ratio (as defined in the Agreement) and is subject to a floor of 2.50% per annum and a cap of 3.00% per annum. Base Rate loans bear interest at a rate equal to the higher of the federal funds rate plus 0.50%, the prime rate of the Lender plus the Applicable Rate or the Eurodollar Base Rate plus 1.0%. The Applicable Rate for Base Rate loans is subject to a floor of 1.50% per annum and a cap of 2.00% per annum. The interest payment date (as defined in the Agreement) will vary based on the type of loan but generally will be quarterly. The Company paid commitment fees, an arrangement fee, upfront fees and a renewal fee pursuant to the terms of the Agreement. The Company will also pay a quarterly fee for any letters of credit issued under the Agreement. All fees associated with the Agreement were capitalized and are being amortized to interest expense using the straight-line method over the remaining term to maturity. The Agreement contains non-financial covenants of the Company and the Guarantors, including restrictions on the ability to create, incur or assume liens and other debt, make certain investments, dispositions and restricted payments, change the nature of the business, and merge with other entities subject to certain caps as defined in the agreement. The Agreement requires the Company to maintain ratios defined in the Agreement, which include a consolidated total leverage ratio as of the end of any fiscal quarter not in excess of 2.50 to 1.00, a consolidated liquidity ratio of at least 1.25 to 1.00 and a consolidated interest coverage ratio at a minimum of 3.00 to 1.00. The Company is in compliance with these covenants as of December 31, 2011. At December 31, 2011 and 2010, there were no amounts outstanding under the Agreement. Since there were no borrowings since the inception of the agreement, no interest cost was incurred during 2011 and 2010.

Bank Line

On September 30, 2010, the Company, the domestic subsidiaries of the Company (the “Guarantors”), Bank of America, N.A., as administrative agent and lender, and Union Bank, N.A., Wells Fargo Bank, N.A., Bank of the West, BBVA Compass Bank and US Bank, as lenders (together with the administrative agent, the “Lenders”), entered into a Credit Agreement (the “Agreement”). The Agreement provides the Company with a three-year unsecured revolving syndicated credit facility of $200,000 maturing on September 30, 2013. On August 24, 2011, the Company extended, with Lender's consent, the maturity date to September 30, 2014. The Company’s obligations under the Agreement are jointly and severally guaranteed by the Guarantors. Upon the occurrence of certain events of default specified in the Agreement, amounts due under the Agreement may be declared immediately due and payable.

The Company may elect to borrow at either a Eurodollar Rate or a Base Rate (each as defined in the Agreement). Eurodollar Rate loans bear interest at an amount equal to the sum of a rate per annum calculated from the British Bankers Association London Interbank Offered Rate ("LIBOR") plus a designated percentage per annum (the “Applicable Rate”). The Applicable Rate for Eurodollar Rate loans is based on the Company’s consolidated total leverage ratio (as defined in the Agreement) and is subject to a floor of 2.50% per annum and a cap of 3.00% per annum. Base Rate loans bear interest at a rate equal to the higher of the federal funds rate plus 0.50%, the prime rate of the Lender plus the Applicable Rate or the Eurodollar Base Rate plus 1.0%. The Applicable Rate for Base Rate loans is subject to a floor of 1.50% per annum and a cap of 2.00% per annum. The interest payment date (as defined in the Agreement) will vary based on the type of loan but generally will be quarterly. The Company paid commitment fees, an arrangement fee, upfront fees and a renewal fee pursuant to the terms of the Agreement. The Company will also pay a quarterly fee for any letters of credit issued under the Agreement. All fees associated with the Agreement were capitalized and are being amortized to interest expense using the straight-line method over the remaining term to maturity.

The Agreement contains non-financial covenants of the Company and the Guarantors, including restrictions on the ability to create, incur or assume liens and other debt, make certain investments, dispositions and restricted payments, change the nature of the business, and merge with other entities subject to certain caps as defined in the agreement. The Agreement requires the Company to maintain ratios defined in the Agreement, which include a consolidated total leverage ratio as of the end of any fiscal quarter not in excess of 2.50 to 1.00, a consolidated liquidity ratio of at least 1.25 to 1.00 and a consolidated interest coverage ratio at a minimum of 3.00 to 1.00. The Company is in compliance with these covenants as of December 31, 2011.

At December 31, 2011 and 2010, there were no amounts outstanding under the Agreement. Since there were no borrowings since the inception of the agreement, no interest cost was incurred during 2011 and 2010.