(1)	Stock-Based Compensation and Retirement Plans

The Company maintains various stock incentive plans that provide long-term incentives to the Company’s key employees, including officers, directors, consultants and advisors (Eligible Participants). Under the incentive plans, the Company may grant incentive stock options, non-qualified stock options, restricted stock, restricted stock units, stock appreciation rights, other stock-based awards or any combination thereof to Eligible Participants.

Stock Options

The Company has issued non-qualified stock options under its stock incentive plans. The options generally vest in equal installments over three years and expire in ten years. Non-vested options are generally forfeited upon termination of employment. The Company’s compensation expense related to stock options for the nine months ended September 30, 2012 and 2011 was approximately $3.8 million and $2.5 million, respectively, which is reflected in general and administrative expenses.

Restricted Stock

The Company has issued shares of restricted stock under its stock incentive plans. Shares of restricted stock generally vest in equal annual installments over three years. Non-vested shares are generally forfeited upon the termination of employment. With the exception of the non-vested shares of restricted stock issued as a result of the Complete acquisition, holders of shares of restricted stock are entitled to all rights of a stockholder of the Company with respect to the restricted stock, including the right to vote the shares and receive any dividends or other distributions. The Company’s compensation expense related to restricted stock for the nine months ended September 30, 2012 and 2011 was approximately $13.1 million and $4.3 million, respectively, which is reflected in general and administrative expenses and cost of services.

Restricted Stock Units

The Company has issued restricted stock units (RSUs) to its non-employee directors under its stock incentive plans. Annually, each non-employee director is issued a number of RSUs having an aggregate dollar value determined by the Company’s Board of Directors. An RSU represents the right to receive from the Company, within 30 days of the date the director ceases to serve on the Board, one share of the Company’s common stock. The Company’s expense related to RSUs for the nine months ended September 30, 2012 and 2011 was approximately $1.9 million and $0.9 million, respectively, which is reflected in general and administrative expenses.

Performance Share Units

The Company has issued performance share units (PSUs) to its employees as part of the Company’s long-term incentive program. There is a three-year performance period associated with each PSU grant. The two performance measures applicable to all participants are the Company’s return on invested capital and total stockholder return relative to those of the Company’s pre-defined “peer group.” If the participant has met specified continued service requirements, the PSUs will settle in cash or a combination of cash and up to 50% of equivalent value in the Company’s common stock, at the discretion of the compensation committee. The Company’s compensation expense related to all outstanding PSUs for the nine months ended September 30, 2012 and 2011 was approximately $8.6 million and $2.3 million, respectively, which is reflected in general and administrative expenses. The Company has recorded both current and long-term liabilities for this liability-based compensation award. During the nine month period ended September 30, 2012, the Company issued approximately 43,300 shares of its common stock and paid approximately $2.7 million in cash to its employees to settle PSUs for the three year performance period ended December 31, 2011. During the nine month period ended September 30, 2011, the Company issued approximately 67,300 shares of its common stock and paid approximately $2.8 million in cash to its employees to settle PSUs for the three year performance period ended December 31, 2010.

Employee Stock Purchase Plan

The Company has an employee stock purchase plan under which an aggregate of 1,000,000 shares of common stock were reserved for issuance. Under this stock purchase plan, eligible employees can purchase shares of the Company’s common stock at a discount. The Company received approximately $2.2 million and $1.7 million related to shares issued under this plan for the nine months ended September 30, 2012 and 2011, respectively. For the nine month periods ended September 30, 2012 and 2011, the Company recorded compensation expense of approximately $0.4 million and $0.3 million, respectively, which is reflected in general and administrative expenses. Additionally, the Company issued approximately 109,000 shares and 57,000 shares in the nine months ended September 30, 2012 and 2011, respectively, related to this stock purchase plan.

Deferred Compensation Plans

The Company has a non-qualified deferred compensation plan which allows certain highly compensated employees to defer up to 75% of their base salary, up to 100% of their bonus, and up to 100% of the cash portion of their PSU compensation to the plan. The Company also has a non-qualified deferred compensation plan for its non-employee directors which allows each director to defer up to 100% of their cash compensation paid by the Company to the plan. Additionally, participating directors may defer up to 100% of the shares of common stock they are entitled to receive in connection with the payout of RSUs. Under each plan, payments are made to participants based on their annual enrollment elections and plan balance. Participants earn a return on their deferred compensation that is based on hypothetical investments in certain mutual funds. Changes in market value of these hypothetical participant investments are reflected as an adjustment to the deferred compensation liability of the Company with an offset to compensation expense (see note 15).

Supplemental Executive Retirement Plan

The Company has a supplemental executive retirement plan (SERP). The SERP provides retirement benefits to the Company’s executive officers and certain other designated key employees. The SERP is an unfunded, non-qualified defined contribution retirement plan, and all contributions under the plan are unfunded credits to a notional account maintained for each participant. Under the SERP, the Company will generally make annual contributions to a retirement account based on age and years of service. The Company may also make discretionary contributions to a participant’s account. The Company recorded compensation expense of approximately $2.1 million and $1.4 million in general and administrative expenses for the nine months ended September 30, 2012 and 2011, respectively.