Employee Benefit Plan

12 Months Ended

Dec. 31, 2014

Compensation and Retirement Disclosure [Abstract]

Employee Benefit Plan

Employee Benefit Plan

We offer the GP Retirement Savings Plan (the “Plan”) to our employees. Eligible employees are automatically enrolled unless they elect to not participate in the Plan, and contributions begin as soon as administratively feasible after enrollment.  The Plan permits pre-tax contributions to the Plan by participants pursuant to Section 401(k) of the Internal Revenue Code (IRC).  We make matching contributions at our discretion. In 2014, 2013 and 2012, we contributed 90,876, 84,333, and 107,728 shares, respectively, of our common stock directly to the Plan with a value of approximately $2.5 million, $2.0 million and $1.8 million, respectively. In addition, we contributed cash, net of forfeitures, to the Plan for matching contributions of $0.2 million for the year ended December 31, 2013 and $0.2 million for the year ended December 31, 2012. For the years ended December 31, 2014, 2013 and 2012, we recognized total compensation expense of $2.5 million, $2.2 million and $2.0 million, respectively, in the consolidated statements of operations for matching contributions to the Plan.