Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2014

Compensation Plans

Summary of the option activity

A summary of the stock option activity in 2014 is presented in the following table (dollars and shares in thousands, except per share amounts):

				Weighted
		Weighted		Average
		Average		Remaining	Aggregate
	Shares	Exercise		Contractual	Intrinsic
	Under Options	Price		Term (Years)	Value
Outstanding as of January 1, 2014	2,222	$	35.77	5.0	$	8,870
Granted	534		38.83
Exercised	(169)		26.57
Outstanding as of December 31, 2014	2,587		37.00	5.0		19,581
Exercisable as of December 31, 2014	1,681		35.58	3.4		15,062

Summary additional information concerning outstanding and exercisable stock options

The following table summarizes additional information concerning outstanding and exercisable stock options at December 31, 2014 (shares in thousands):

					Currently Exercisable
				Weighted
		Weighted		Average		Weighted
		Average		Remaining		Average
Range of	Shares Under	Exercise		Contractual	Shares Under	Exercise
Exercise Price	Options	Price		Term (Years)	Options	Price
$23.34 - $25.52	352	$	23.34	2.9	352	$	23.34
27.11 -  28.35	306		28.35	3.6	217		28.35
31.95 -  46.92	1,929		40.86	5.6	1,112		40.86
	2,587		37.00		1,681		35.58

Summary of additional information concerning unvested stock options

The following table summarizes additional information concerning unvested stock options at December 31, 2014 (shares in thousands):

		Weighted
	Shares	Average
	Under	Grant Date Fair
	Options	Value
Unvested at January 1, 2014	941	$	5.09
Granted	534		3.80
Vested	(569)		4.25
Unvested at December 31, 2014	906		4.85

Assumptions used for estimating fair value of stock options using Black-Scholes option valuation model

	2014		2013		2012
Risk-free rate	1.34	%	0.78	%	1.09	%
Expected life (in years)	4.5		4.5		5.9
Expected volatility	22.9	%	28.9	%	32.7	%
Expected dividend yield	5.4	%	5.8	%	5.9	%

Summary of additional information concerning restricted stock and restricted stock units

The following table summarizes additional information concerning restricted stock and restricted stock units at December 31, 2014 (units and shares in thousands):

		Weighted			Weighted
	Restricted	Average			Average
	Stock	Grant Date		Restricted	Grant Date
	Units	Fair Value		Shares	Fair Value
Unvested at January 1, 2014	1,208	$	38.82	226	$	35.70
Granted	528		39.58	—		—
Vested	(614)		39.18	(113)		32.78
Forfeited	(222)		31.13	(1)		26.48
Unvested at December 31, 2014	900		40.54	112		38.69