Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2015

Schedule of stock option activity and related information

	Years Ended December 31,
	2015							2014					2013
	Options			Weighted Average Exercise Price		Weighted Average Intrinsic Value		Options			Weighted Average Exercise Price		Options			Weighted Average Exercise Price
	(Options in thousands)
Outstanding at beginning of year		495		$	47.34				1,029		$	41.66		1,064		$	33.37
Granted		—			—				114			57.58		379			54.78
Cancelled/Forfeitures		(69	)		51.66				(306	)		44.19		(53	)		36.97
Exercised		(64	)		36.29				(342	)		36.48		(361	)		31.73
Outstanding at end of year		362		$	48.46	$	5.29		495		$	47.34		1,029		$	41.66
Exercisable at end of year		192		$	45.10	$	7.74		128		$	40.04		249		$	32.35

Schedule of information about options outstanding

        The following table summarizes information about options outstanding at December 31, 2015:

	Options Outstanding						Options Exercisable
Range of Exercise Prices	Number Outstanding		Weighted Average Remaining Contractual Life (years)		Weighted Average Exercise Price		Number Exercisable		Weighted Average Exercise Price
	(Options in thousands)
$26.34–$37.41		125		5.88	$	34.56		91	$	33.48
$40.17–$47.21		3		5.74		41.34		2		42.18
$54.76–$54.76		136		7.18		54.76		64		54.76
$57.47–$60.10		98		8.36		57.66		35		57.65
		362		7.04	$	48.46		192	$	45.10

Schedule of weighted average assumptions used to estimate the grant-date fair value of share issued under the 2004 Stock Incentive Plan

	Years Ended December 31,
	2014			2013
Expected life (years)		6.0			6.0
Expected stock price volatility		37.5	%		40.3	%
Expected dividend yield		1.0	%		1.0	%
Risk-free interest rate		1.9	%		1.7	%

Schedule of nonvested restricted stock and deferred shares activity and related information

	Years Ended December 31,
	2015					2014					2013
	Shares			Weighted Average Grant Date Fair Value		Shares			Weighted Average Grant Date Fair Value		Shares			Weighted Average Grant Date Fair Value
	(Shares in thousands)
Unvested at beginning of year		214		$	53.74		260		$	45.58		237		$	35.45
Granted		180			50.87		151			56.79		142			54.80
Cancelled/Forfeitures		(28	)		53.99		(95	)		46.83		(16	)		37.44
Vested		(122	)		51.72		(102	)		44.87		(103	)		35.25
Unvested at end of year		244		$	52.61		214		$	53.74		260		$	45.58

Schedule of the Company's RSU activity and related information

	Years Ended December 31,
	2015						2014					2013
	RSUs			Weighted Average Purchase Price		Weighted Average Intrinsic Value	RSUs			Weighted Average Purchase Price		RSUs			Weighted Average Purchase Price
	(RSU's in thousands)
Outstanding at beginning of period		80		$	32.08			132		$	27.46		196		$	22.88
Granted		60			37.13			31			40.27		45			31.63
Cancelled/Forfeitures		(9	)		36.92			(32	)		31.58		(14	)		28.35
Settled		(30	)		27.10			(51	)		25.41		(95	)		19.19
Outstanding at end of period		101		$	36.14		$	80		$	32.08		132		$	27.46
Vested at end of period		25		$	33.35		$	31		$	27.96		42		$	25.30

Schedule of information about RSUs outstanding

        The following table summarizes information about RSUs outstanding at December 31, 2015:

	RSUs Outstanding				RSUs Vested
Range of Purchase Prices	Number Outstanding		Weighted Average Purchase Price		Number Vested		Weighted Average Purchase Price
	(RSUs in thousands)
$19.87–$25.15		1	$	25.15		1	$	25.15
$26.51–$31.63		26		31.43		18		31.35
$37.13–$40.27		74		37.92		6		40.27
		101	$	36.14		25	$	33.35

Schedule of weighted average assumptions used to estimate the grant-date fair value of restricted stock units

	Years Ended December 31,
	2015			2014			2013
Expected life (years)		3.0			3.0			3.0
Expected stock price volatility		23.4	%		31.2	%		34.1	%
Expected dividend yield		1.2	%		0.9	%		0.9	%
Risk-free interest rate		1.1	%		0.7	%		0.4	%

Performance stock units

Schedule of unvested performance shares activity and related information

	Years Ended December 31,
	2015					2014
	Shares			Weighted Average Grant Date Fair Value		Shares			Weighted Average Grant Date Fair Value
	(Shares in thousands)
Unvested at beginning of year		107		$	56.97		—
Granted		106			58.94		117		$	57.02
Cancelled/Forfeitures		(12	)		57.51		(10	)		57.47
Vested		—					—
Unvested at end of year		201		$	57.98		107		$	56.97