Stock Compensation Plans (Tables)

Total stock-based compensation expense included in our Consolidated Statement of Income and Comprehensive Income was as follows:



	December 31,
(DOLLARS IN THOUSANDS)	2014			2013			2012
Equity-based awards	$	22,648		$	23,736		$	19,716
Liability-based awards	4,354			4,042			3,294
Total stock-based compensation	27,002			27,778			23,010
Less tax benefit	(8,018		)	(8,456		)	(7,228		)
Total stock-based compensation, net of tax	$	18,984		$	19,322		$	15,782

Principal assumptions used in applying the Binomial model in 2012 were:



	2012
Weighted average fair value of SSARs granted during the period	$	10.39
Assumptions:
Risk-free interest rate	0.9		%
Expected volatility	22.5		%
Expected dividend yield	2.1		%
Expected life, in years	5
Termination rate	1.05		%
Exercise multiple	1.44

SSARs and options activity were as follows:



(SHARE AMOUNTS IN THOUSANDS)	Shares Subject to SSARs/Options		Weighted Average Exercise Price		SSARs/ Options Exercisable
Balance at Balance at December 31, 2013	315		$	49.96	183
Exercised	(144	)	$	50.45
Cancelled	(20	)	$	60.39
Balance at Balance at December 31, 2014	151		$	51.13	116

SSARs and options outstanding at December 31, 2014 were as follows:



Price Range	Number Outstanding (in thousands)	Weighted Average Remaining Contractual Life (in years)	Weighted Average Exercise Price		Aggregate Intrinsic Value (in thousands)
$26 – $30	1	4.4	$	30.48
$31 – $35	18	0.9	$	35.03
$36 – $40	6	1.3	$	36.00
$41 – $50	39	1.9	$	44.56
$51 – $60	59	3.4	$	56.68
$61 – $65	28	1.6	$	62.13
	151		$	51.13	$	7,490

SSARs and options exercisable as of December 31, 2014 were as follows:



Price Range	Number Exercisable (in thousands)	Weighted Average Remaining Contractual Life (in years)	Weighted Average Exercise Price		Aggregate Intrinsic Value (in thousands)
$26 – $30	1	4.4	$	30.48
$31 – $35	18	0.9	$	35.03
$36 – $40	6	1.3	$	36.00
$41 – $50	39	1.9	$	44.56
$51 – $55	25	2.0	$	49.58
$61 - $65	27	1.61	$	62.13
	116		$	47.92	$	6,050

RSU activity was as follows:



(SHARE AMOUNTS IN THOUSANDS)	Number of Shares		Weighted Average Grant Date Fair Value Per Share
Balance at December 31, 2013	558		$	64.86
Granted	206		$	94.19
Vested	(200	)	$	59.43
Forfeited	(42	)	$	82.34
Balance at December 31, 2014	522		$	74.83

PRS activity was as follows:



(SHARE AMOUNTS IN THOUSANDS)	Number of Shares		Weighted Average Grant Date Fair Value Per Share
Balance at Balance at December 31, 2013	476		$	60.58
Granted	99		$	97.94
Vested	(155	)	$	62.13
Forfeited	(40	)	$	57.59
Balance at Balance at December 31, 2014	380		$	57.36

Cash RSU activity was as follows:



(SHARE AMOUNTS IN THOUSANDS)	Cash RSUs		Weighted Average Fair Value Per Share
Balance at Balance at December 31, 2013	112		$	85.94
Granted	35		$	100.85
Vested	(37	)	$	97.68
Cancelled	(4	)	$	99.73
Balance at Balance at December 31, 2014	106		$	100.85