Pension, Postretirement and Postemployment Benefits

12 Months Ended

Dec. 31, 2015

Pension, Postretirement and Postemployment Benefits

Pension, Postretirement and Postemployment Benefits

Note 15 Pension, Postretirement and Postemployment Benefits

Pension Plans

In conjunction with our acquisition of Pool Energy Services Co. (“Pool”) in November 1999, we acquired the assets and liabilities of a defined benefit pension plan, the Pool Company Retirement Income Plan (the “Pool Pension Plan”). Benefits under the Pool Pension Plan are frozen and participants were fully vested in their accrued retirement benefit on December 31, 1998. The unfunded liability was $8.4 million and $9.1 million as of December 31, 2015 and 2014 and our net periodic benefit expense was $1.0 million, $0.3 million and $1.0 million for the years ended December 31, 2015, 2014 and 2013, respectively. Due to the immateriality of the costs and liabilities of this plan, no further disclosure is presented.