STOCK AWARD PLANS (Tables)

6 Months Ended

Jun. 30, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

A summary of our total compensation expense recognized in our condensed consolidated statements of operations and comprehensive income for stock-based compensation is as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2015		2014		2015		2014
Stock options	$	4,109	$	2,308	$	7,873	$	2,761
Stock awards	11,057		8,840		21,736		12,353
Company expense on ESPP discount	517		482		1,410		1,309
Total stock-based compensation expense	$	15,683	$	11,630	$	31,019	$	16,423

Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity

The following is a summary of the employee stock purchase plan activity (dollar amounts in thousands):

Three Months Ended June 30, 2015
Shares purchased by employees	Aggregate cost to employees		Expense recognized by the company
55,206	$	2,928	$	517