Stock-Based Compensation	6 Months Ended
Jun. 30, 2014
Share-Based Compensation [Abstract]
STOCK-BASED COMPENSATION	10. STOCK-BASED COMPENSATION We account for stock-based compensation in accordance with Codification Topic 718, Compensation-Stock Compensation, which generally requires us to recognize non-cash compensation expense for stock-based payments using the fair-value-based method. The fair value of each stock option grant has been estimated on the date of grant using the Black-Scholes option pricing model. Accordingly, we recorded compensation expense pertaining to stock-based compensation of $9,933 and $7,940 during the three-month periods ended June 30, 2014 and 2013, respectively, and $17,291 and $16,321 during the six-month periods ended June 30, 2014 and 2013, respectively. Codification Topic 718 requires us to reflect gross tax savings resulting from tax deductions in excess of expense reflected in our financial statements as a financing cash flow.

Stock-Based Compensation

6 Months Ended

Jun. 30, 2014

10. STOCK-BASED COMPENSATION

We account for stock-based compensation in accordance with Codification Topic 718, Compensation-Stock Compensation, which generally requires us to recognize non-cash compensation expense for stock-based payments using the fair-value-based method. The fair value of each stock option grant has been estimated on the date of grant using the Black-Scholes option pricing model. Accordingly, we recorded compensation expense pertaining to stock-based compensation of $9,933 and $7,940 during the three-month periods ended June 30, 2014 and 2013, respectively, and $17,291 and $16,321 during the six-month periods ended June 30, 2014 and 2013, respectively. Codification Topic 718 requires us to reflect gross tax savings resulting from tax deductions in excess of expense reflected in our financial statements as a financing cash flow.