Revolving Line Of Credit	6 Months Ended
Jun. 30, 2011
Revolving Line Of Credit
Revolving Line Of Credit	(4) Revolving Line of Credit In August 2010, we entered into a $150.0 million Credit Agreement (the "Credit Facility") and a related pledge and security agreement with a group of seven financial institutions, with Bank of America, N.A., as Administrative Agent. The Credit Facility provides for a revolving credit line of $150.0 million (which may be increased up to $200.0 million subject to our obtaining commitments for such increase), with a $25.0 million sublimit for letters of credit. The Credit Facility matures on August 11, 2014. Borrowings under the Credit Facility may be used for general corporate purposes, including working capital requirements, acquisitions and share repurchases. Borrowings under the Credit Facility bear interest at a rate of either (1) Bank of America's prime rate plus a margin of 1.50% to 2.75% or (2) the 30, 60, 90 or 180-day LIBOR rate plus a margin of 2.50% to 3.75%, with the margin determined by our consolidated leverage ratio. As of June 30, 2011, our effective average interest rate for borrowings during the three and six months ended June 30, 2011 was 3.46% and 3.23%, respectively. As of June 30, 2011, our interest rate was 3.19%. The Credit Facility is secured by substantially all of our assets, excluding real property. The Credit Facility requires us to maintain certain financial ratios and other financial conditions and prohibits us from making certain investments, advances, cash dividends or loans, and limits incurrence of additional indebtedness and liens. As of June 30, 2011, we were in compliance with those covenants. As of June 30, 2011, we had $31.5 million in outstanding borrowings and unused available borrowing capacity of $110.2 million under the Credit Facility. In addition, as of June 30, 2011, our bank had issued outstanding letters of credit totaling $8.3 million to secure surety bonds required by some of our customer contracts. These letters of credit reduce our available borrowing capacity and expire through mid-2012.

Revolving Line Of Credit

6 Months Ended

Jun. 30, 2011

(4) Revolving Line of Credit

In August 2010, we entered into a $150.0 million Credit Agreement (the "Credit Facility") and a related pledge and security
agreement with a group of seven financial institutions, with Bank of America, N.A., as Administrative Agent. The Credit Facility
provides for a revolving credit line of $150.0 million (which may be increased up to $200.0 million subject to our obtaining
commitments for such increase), with a $25.0 million sublimit for letters of credit. The Credit Facility matures on August 11,
2014. Borrowings under the Credit Facility may be used for general corporate purposes, including working capital requirements,
acquisitions and share repurchases.

Borrowings under the Credit Facility bear interest at a rate of either (1) Bank of America's prime rate plus a margin of 1.50% to
2.75% or (2) the 30, 60, 90 or 180-day LIBOR rate plus a margin of 2.50% to 3.75%, with the margin determined by our
consolidated leverage ratio. As of June 30, 2011, our effective average interest rate for borrowings during the three and six months
ended June 30, 2011 was 3.46% and 3.23%, respectively. As of June 30, 2011, our interest rate was 3.19%. The Credit Facility is
secured by substantially all of our assets, excluding real property. The Credit Facility requires us to maintain certain financial
ratios and other financial conditions and prohibits us from making certain investments, advances, cash dividends or loans, and
limits incurrence of additional indebtedness and liens. As of June 30, 2011, we were in compliance with those covenants.

As of June 30, 2011, we had $31.5 million in outstanding borrowings and unused available borrowing capacity of $110.2 million
under the Credit Facility. In addition, as of June 30, 2011, our bank had issued outstanding letters of credit totaling $8.3 million to
secure surety bonds required by some of our customer contracts. These letters of credit reduce our available borrowing capacity
and expire through mid-2012.