Incentive Plan (Tables)

6 Months Ended

Jun. 30, 2011

Incentive Plan

Summary of Incentive Award Plan's Stock Options

	Period ended June 30, 2011
	Shares			Weighted average exercise price
Options outstanding, beginning of period		470,264		$	28.35
Exercised		(80,303	)		38.02
Cancelled / Forfeited		(8,727	)		41.73
Options outstanding, end of period		381,234		$	26.01
Exercisable, end of period		317,007		$	22.90

Summary of Stock Option Outstanding and Exercisable

Options outstanding									Options exercisable
Exercise price	Number outstanding		Weighted average remaining contractual life (years)		Weighted average exercise price		Aggregate intrinsic value		Number exercisable		Weighted average remaining contractual life (years)		Weighted average exercise price		Aggregate intrinsic value
$12.00-13.02		182,369		3.33	$	12.01	$	9,077,054		182,369		3.33	$	12.01	$	9,077,054
$20.37-28.09		22,722		4.47		22.98		881,525		22,638		4.46		22.97		878,584
$33.18-41.73		176,143		5.79		40.90		3,677,064		112,000		5.77		40.61		2,370,865
		381,234		4.53	$	26.01	$	13,635,643		317,007		4.27	$	22.90	$	12,326,503