Line Of Credit	9 Months Ended
Sep. 30, 2013
Line Of Credit [Abstract]
Line Of Credit	9. Line of Credit On July 31, 2013, the Company renewed and extended the term of its Credit Agreement (the "Credit Agreement") with Silicon Valley Bank ("SVB"), U.S. Bank National Association, and Bank of America, N.A. The Credit Agreement provides for revolving credit borrowings up to a maximum principal amount of $75.0 million, subject to a commitment increase of $25.0 million. The Credit Agreement also allows for the issuance of letters of credit in the aggregate amount of up to $5.0 million at any one time. Outstanding letters of credit reduce the credit available for revolving credit borrowings. As of September 30, 2013, the Company had an outstanding letter of credit in the amount of $0.2 million to secure an office space lease. The Credit Agreement also allows for the issuance of swing line loans in the aggregate of $10.0 million. Substantially all of the Company's assets are pledged to secure the credit facility. All outstanding amounts owed under the Credit Agreement become due and payable no later than the final maturity date of July 31, 2017. Borrowings under the credit facility bear interest at the Company's option of SVB's prime rate (4.00% on September 30, 2013) plus a margin ranging from 0.00% to 0.50% or one-month LIBOR (0.18% on September 30, 2013) plus a margin ranging from 2.00% to 2.50%. The additional margin amount is dependent on the level of outstanding borrowings. As of September 30, 2013, the Company had $58.8 million of borrowing capacity. An annual commitment fee of 0.30% is incurred on the unused portion of the line of credit. The Company is required to comply with various financial covenants under the Credit Agreement. Specifically, the Company is required to maintain a ratio of earnings before interest, taxes, depreciation, and amortization ("EBITDA") plus stock compensation and minus income taxes paid and capital expenditures to interest expense and scheduled payments due for borrowings on a trailing three months basis annualized of not less than 2.00 to 1.00 and a ratio of current maturities of long-term debt to EBITDA plus stock compensation and minus income taxes paid and capital expenditures of not more than 2.75 to 1.00. At September 30, 2013, the Company was in compliance with all covenants under the Credit Agreement.

9. Line of Credit

On July 31, 2013, the Company renewed and extended the term of its Credit Agreement (the "Credit Agreement") with Silicon Valley Bank ("SVB"), U.S. Bank National Association, and Bank of America, N.A. The Credit Agreement provides for revolving credit borrowings up to a maximum principal amount of $75.0 million, subject to a commitment increase of $25.0 million. The Credit Agreement also allows for the issuance of letters of credit in the aggregate amount of up to $5.0 million at any one time. Outstanding letters of credit reduce the credit available for revolving credit borrowings. As of September 30, 2013, the Company had an outstanding letter of credit in the amount of $0.2 million to secure an office space lease. The Credit Agreement also allows for the issuance of swing line loans in the aggregate of $10.0 million. Substantially all of the Company's assets are pledged to secure the credit facility.

All outstanding amounts owed under the Credit Agreement become due and payable no later than the final maturity date of July 31, 2017. Borrowings under the credit facility bear interest at the Company's option of SVB's prime rate (4.00% on September 30, 2013) plus a margin ranging from 0.00% to 0.50% or one-month LIBOR (0.18% on September 30, 2013) plus a margin ranging from 2.00% to 2.50%. The additional margin amount is dependent on the level of outstanding borrowings. As of September 30, 2013, the Company had $58.8 million of borrowing capacity. An annual commitment fee of 0.30% is incurred on the unused portion of the line of credit.

The Company is required to comply with various financial covenants under the Credit Agreement. Specifically, the Company is required to maintain a ratio of earnings before interest, taxes, depreciation, and amortization ("EBITDA") plus stock compensation and minus income taxes paid and capital expenditures to interest expense and scheduled payments due for borrowings on a trailing three months basis annualized of not less than 2.00 to 1.00 and a ratio of current maturities of long-term debt to EBITDA plus stock compensation and minus income taxes paid and capital expenditures of not more than 2.75 to 1.00.

At September 30, 2013, the Company was in compliance with all covenants under the Credit Agreement.