Retirement Plans	12 Months Ended
Dec. 31, 2013
Retirement Plans
Retirement Plans	13. Retirement Plans We maintain a defined contribution benefit plan under Section 401(k) of the Internal Revenue Code. Almost all of our domestic full-time employees are eligible to participate in this plan. Under the plan during 2011, we provided matching contributions of fifty cents for every dollar employees contribute up to a maximum of $3,000. During 2012, we provided matching contributions of fifty cents for every dollar employees contribute, up to the lesser of 3% of the employee’s eligible compensation or $7,500. During 2013, we provided a matching contributions of fifty cents for every dollar employees contribute, up to the lesser of 3% of the employee’s eligible compensation or $7,650. Generally, the plan calls for vesting of Company contributions over the initial five years of a participant’s employment. We maintain a similar type of contribution plan at one of our foreign subsidiaries. Our contributions to these plans in 2013, 2012 and 2011 were $2.3 million, $2.5 million and $2.1 million, respectively. We acquired a defined benefit plan on May 5, 2000 that had been frozen as of September 30, 1991. No further benefits since September 30, 1991 accrued to any participant. The benefit that participants are entitled to receive as of their normal retirement date is their accrued benefit as of September 30, 1991. In connection with the freezing of the Plan as of September 30, 1991, all participants became fully vested in their benefit. The Plan is subject to the provisions of the Employee Retirement Income Security Act of 1974 (“ERISA”). This plan has a plan year end of September 30. There are 110 participants in the plan as of September 30, 2013. The plan is funded in accordance with ERISA guidelines and has $1.6 million in contract assets as of September 30, 2013.

13. Retirement Plans

We maintain a defined contribution benefit plan under Section 401(k) of the Internal Revenue Code. Almost all of our domestic full-time employees are eligible to participate in this plan. Under the plan during 2011, we provided matching contributions of fifty cents for every dollar employees contribute up to a maximum of $3,000. During 2012, we provided matching contributions of fifty cents for every dollar employees contribute, up to the lesser of 3% of the employee’s eligible compensation or $7,500. During 2013, we provided a matching contributions of fifty cents for every dollar employees contribute, up to the lesser of 3% of the employee’s eligible compensation or $7,650. Generally, the plan calls for vesting of Company contributions over the initial five years of a participant’s employment. We maintain a similar type of contribution plan at one of our foreign subsidiaries. Our contributions to these plans in 2013, 2012 and 2011 were $2.3 million, $2.5 million and $2.1 million, respectively.

We acquired a defined benefit plan on May 5, 2000 that had been frozen as of September 30, 1991. No further benefits since September 30, 1991 accrued to any participant. The benefit that participants are entitled to receive as of their normal retirement date is their accrued benefit as of September 30, 1991. In connection with the freezing of the Plan as of September 30, 1991, all participants became fully vested in their benefit. The Plan is subject to the provisions of the Employee Retirement Income Security Act of 1974 (“ERISA”). This plan has a plan year end of September 30. There are 110 participants in the plan as of September 30, 2013. The plan is funded in accordance with ERISA guidelines and has $1.6 million in contract assets as of September 30, 2013.