401(k) Plan	12 Months Ended
Dec. 31, 2015
Postemployment Benefits [Abstract]
401(k) PLAN	401(k) PLAN Under the Company’s 401(k) plan, corporate participants may direct the investment of contributions to their accounts among certain investments. The Company matches individual employee 401(k) plan contributions at the rate of $0.50 for every dollar contributed by employees subject to a cap. The Company recorded matching contributions to the 401(k) plan of $4.6 million, $3.5 million, and $2.7 million during the years ended December 31, 2015, 2014, and 2013, respectively, which are reflected in various operating expense lines within the accompanying consolidated statements of operations. The Company also maintains a multiple employer defined contribution plan, which covers WSEs for client companies electing to participate in the plan and for its internal staff employees. The Company contributes, on behalf of each participating client, varying amounts based on the clients’ policies and serviced employee elections.

401(k) Plan

12 Months Ended

Dec. 31, 2015

Under the Company’s 401(k) plan, corporate participants may direct the investment of contributions to their accounts among certain investments. The Company matches individual employee 401(k) plan contributions at the rate of $0.50 for every dollar contributed by employees subject to a cap. The Company recorded matching contributions to the 401(k) plan of $4.6 million, $3.5 million, and $2.7 million during the years ended December 31, 2015, 2014, and 2013, respectively, which are reflected in various operating expense lines within the accompanying consolidated statements of operations.

The Company also maintains a multiple employer defined contribution plan, which covers WSEs for client companies electing to participate in the plan and for its internal staff employees. The Company contributes, on behalf of each participating client, varying amounts based on the clients’ policies and serviced employee elections.