Long-term Equity-based Compensation Plans (Tables)

The assumptions used in the Black-Scholes pricing model for Tandem Awards granted during the six months ended June 30, 2015 and 2014 were as follows:



	Six Months Ended
	Jun 30, 2015					Jun 30, 2014
Range of Valuation Assumptions
Expected Volatility	22.49	%	-	41.65	%	25.76	%	-	44.43	%
Risk-free Interest Rate	1.08		-	1.68		1.07		-	2.14
Expected Dividend Yield	2.47		-	2.62		2.53		-	2.60
Weighted-Average Expected Life in Years
Employee Grants	4		-	7		4		-	7
Director Grants	5.5					6

Tandem Award activity for the six months ended June 30, 2015 is presented below.



	Shares Subject to Awards		Weighted- average Exercise Price Per Share ($)		Weighted- average Remaining Contractual Life (in Years)	Aggregate Intrinsic Value ($ in Millions)
Outstanding at Beginning of the Year	2,265,711		$	39.74
Granted	293,750		36.38
Exercised	(308,625	)	28.54
Forfeited or Expired	(450,461	)	46.35
Outstanding at June 30, 2015	1,800,375		$	39.46	4.83	$	4.4
Vested and Expected to Vest at June 30, 2015	1,756,472		$	39.57	4.73	$	4.2
Exercisable at June 30, 2015	1,230,371		$	41.38	3.02	$	2.5

Information pertaining to Tandem Awards outstanding at June 30, 2015 is presented below.



					Outstanding				Exercisable
Range of Exercise Prices Per Share ($)					Shares Subject to Tandem Awards	Weighted- average Exercise Price Per Share ($)		Weighted- average Remaining Contractual Life (in Years)	Shares Subject to Tandem Awards	Weighted- average Exercise Price Per Share ($)
$	15.01	-	$	20.00	4,000	$	16.48	3.85	4,000	$	16.48
20.01		-	25.00		17,500	23.27		4.55	17,500	23.27
25.01		-	30.00		151,125	29.20		6.26	105,123	29.03
30.01		-	35.00		196,750	33.23		7.62	104,750	33.04
35.01		-	40.00		837,000	36.72		6.73	404,998	37.17
40.01		-	45.00		—	—		—	—	—
45.01		-	50.00		594,000	48.62		0.88	594,000	48.62
15.01		-	50.00		1,800,375	39.46		4.83	1,230,371	41.38

Activity related to DSU awards for the six months ended June 30, 2015 was as follows:



	Number of DSUs		Weighted- Average Grant-Date Fair Value Per DSU
Vested Balance at Beginning of the Year	8,000		$	34.52
Granted and Vested	3,500		38.38
Reduction for Shares Issued on Conversion	(4,500	)	34.94
Forfeited	—		—
Vested Balance at End of Period	7,000		36.17

Activity related to nonvested time-based restricted stock and nonvested time-based RSUs for the six months ended June 30, 2015 was as follows:



	Time-based Restricted Stock Awards				Time-based RSU Awards
	Number of Shares		Weighted- average Grant-date Fair Value Per Share		Number of RSUs		Weighted- average Grant-date Fair Value Per RSU
Nonvested Balance at Beginning of the Year	53,095		$	32.42	30,024		$	36.60
Granted	—		—		67,375		36.65
Vested	(500	)	29.02		—		—
Forfeited	(4,814	)	29.39		(1,775	)	36.13
Nonvested Balance at End of Period	47,781		32.73		95,624		36.64

Activity related to nonvested performance-based restricted stock and nonvested performance-based RSUs for the six months ended June 30, 2015 was as follows:



	Performance-based Restricted Stock Awards				Performance-based RSU Awards
	Number of Shares		Weighted- average Grant-date Fair Value Per Share		Number of RSUs		Weighted- average Grant-date Fair Value Per RSU
Nonvested Balance at Beginning of the Year	110,625		$	39.28	61,875		$	40.50
Granted	—		—		68,825		43.05
Vested	—		—		—		—
Forfeited	(59,225	)	36.81		(1,800	)	41.49
Nonvested Balance at End of Period	51,400		42.12		128,900		41.85