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Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2015

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

Schedule Of Share Based Compensation Shares Authorized Under Stock Plans Issued And Avaliability

The following table summarizes the number of shares of common stock authorized for use under the Plan, the number of stock-based awards granted (net of expired or cancelled awards) under the Plan and the number of shares of common stock available for the grant of stock-based awards under the Plan:



Common stock authorized	23,466,000
Stock-based awards, including restricted stock and stock options granted, net of expired or cancelled	(19,287,000	)
Common stock available for grant of stock-based awards as of March 31, 2015	4,179,000

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

Total equity-based compensation for the three months ended March 31, 2015 and 2014 is as follows:



	Three Months Ended March 31,
	2015		2014
Restricted stock	$	3,760	$	3,785
Stock options	998		1,139
Total	$	4,758	$	4,924

Schedule Of Cash Proceeds And Intrinsic Values For Stock Options Exercised

Cash proceeds and intrinsic values related to total stock options exercised during the three months ended March 31, 2015 and 2014 are as follows:



	Three Months Ended March 31,
	2015		2014
Proceeds from stock options exercised	$	16,807	$	521
Intrinsic value of stock options exercised	$	27,446	$	586

Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Method Used

The following weighted average assumptions were used for stock options granted during the three months ended March 31, 2015 and 2014:



	2015	2014
Volatility	23.7% to 28.3%	29.7% to 31.8%
Risk free interest rate	0.99% to 1.60%	1.06% to 1.72%
Expected life in years	4.1 to 5.1	4.1 to 5.1
Dividend yield	0.00%	0.00%
Weighted average fair value	$8.48	$10.04

Schedule of Share-based Compensation, Stock Options, Activity

Activity relating to stock options granted under the Company’s plans and outside the plans during the three months ended March 31, 2015 is as follows:



	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding at January 1, 2015	3,428,000		$	19.48
Granted	41,000		34.74
Exercised	(1,190,000	)	14.12
Cancelled/Forfeited	(6,000	)	16.93
Outstanding at March 31, 2015	2,273,000		$	22.56	3.6 years	$	35,097
Exercisable at March 31, 2015	1,457,000		$	17.34	2.6 years	$	30,106

Schedule of Nonvested Share Activity

The following table summarizes restricted stock activity during the three months ended March 31, 2015 and 2014:



	2015				2014
	Number of Shares		Weighted Average Fair Value at Grant Date		Number of Shares		Weighted Average Fair Value at Grant Date
Non-vested at January 1,	4,067,000		$	24.69	4,257,000		$	24.24
Granted	191,000		35.80		112,000		35.78
Vested	(135,000	)	21.23		(116,000	)	24.54
Forfeited	—		—		(2,000	)	27.03
Non-vested at March 31,	4,123,000		$	22.84	4,251,000		$	24.54