Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2012

Deferred Compensation Arrangements [Abstract]

Schedule of Nonvested Share Activity

The following table summarizes our outstanding non-vested stock options:

	Number of Shares		Weighted Average Grant Date Fair Value
Non-vested December 31, 2011	173,592		$8.37
Options granted under 2005 Plan	340,000		$6.36
Options vested under 2005 Plan	(336,917	)	$7.37
Non-vested December 31, 2012	176,675		$8.09

Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions

The fair value of each grant is estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted average assumptions:

	2012	2011	2010
Dividend yield	6.02%	5.9%	6.52%
Expected volatility	32%	45.71%	37.56%
Expected lives	3.9 years	3.9 years	4.9 years
Risk-free interest rate	0.32%	1.11%	2.22%

Schedule of Share-based Compensation, Stock Options, Activity

The following tables summarize our outstanding stock options:

				Weighted Average
	Number		Weighted Average	Remaining	Aggregate
	of Shares		Exercise Price	Contractual Life (Years)	Intrinsic Value
Outstanding December 31, 2009	253,836		$27.72
Options granted under 2005 Plan	395,000		$36.18
Options exercised under 1997 Plan	(48,717	)	$31.56
Options exercised under 2005 Plan	(215,612	)	$31.78
Outstanding December 31, 2010	384,507		$33.24
Options granted under 2005 Plan	340,000		$46.11
Options exercised under 1997 Plan	(15,000	)	$23.79
Options exercised under 2005 Plan	(183,417	)	$32.69
Options forfeited under 2005 Plan	(16,668	)	$41.52
Outstanding December 31, 2011	509,422		$42.03
Options granted under 2005 Plan	340,000		$47.52
Options exercised under 1997 Plan	(19,266	)	$33.26
Options exercised under 2005 Plan	(618,481	)	$43.63
Outstanding December 31, 2012	211,675		$46.60	3.71	$	2,102,000
Exercisable December 31, 2012	35,000		$44.08	3.14	$	436,000

			Remaining
Grant	Number	Exercise	Contractual
Date	of Shares	Price	Life in Years
2/4/2008	5,000	29.24	0.1
2/22/2011	15,000	45.58	3.15
2/25/2011	56,672	46.22	3.15
2/21/12	135,003	47.52	4.15
Outstanding December 31, 2012	211,675

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity

The following table summarizes our restricted stock activity:

	Number of Shares		Weighted Average Remaining Vesting Period (Years)	Aggregate Intrinsic Value
Non-vested at December 31, 2009	5,100		1.026	$	189,000
Vested during the period	(1,925	)	—	—
Non-vested at December 31, 2010	3,175		0.54	$	143,000
Vested during the period	(1,925	)	—	—
Non-vested at December 31, 2011	1,250		0.095	$	55,000
Vested during the period	(1,250	)	—	—
Non-vested at December 31, 2012	—