SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS

12 Months Ended

Dec. 31, 2011

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS

SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS

	For the years ended December 31, 2011, 2010 and 2009
(in thousands)		Balance at Beginning of Period		Charged to Costs and Expenses		Net (Deductions) Recoveries				Balance at End of Period
Year ended December 31, 2011
Allowance for doubtful accounts		$	8,694	$	2,868	$	(3,469	)	(1)	$	8,093
Deferred tax asset valuation allowance		$	1,295	$	—	$	—			$	1,295
Year ended December 31, 2010
Allowance for doubtful accounts		$	3,210	$	4,812	$	672		(1)	$	8,694
Deferred tax asset valuation allowance		$	1,550	$	—	$	(255	)	(2)	$	1,295
Year ended December 31, 2009
Allowance for doubtful accounts		$	6,199	$	660	$	(3,649	)	(1)	$	3,210
Deferred tax asset valuation allowance		$	1,454	$	96	$	—		(2)	$	1,550

(1)	Net (deductions) recoveries in the allowance for doubtful accounts principally reflect the write-off of previously reserved accounts net of recoveries.
(2)	The valuation allowance for deferred tax assets is increased or decreased each year to reflect the state net operating losses that management believes will not be utilized before they expire.

SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED)

Quarters ended	March 31		June 30		September 30		December 31
(in thousands except per share data)
2011
Revenues	$	381,761	$	443,029	$	502,235	$	482,782
Net income	$	65,524	$	73,165	$	83,111	$	74,581
Net income per share — basic (a)	$	0.45	$	0.50	$	0.57	$	0.51
Net income per share — diluted (a)	$	0.45	$	0.50	$	0.57	$	0.51
2010
Revenues	$	213,144	$	252,896	$	302,200	$	328,144
Net income	$	13,400	$	31,602	$	46,269	$	55,471
Net income per share — basic (a)	$	0.09	$	0.22	$	0.32	$	0.38
Net income per share — diluted (a)	$	0.09	$	0.21	$	0.31	$	0.38

(a) The sum of the income (loss) per share for the four quarters may differ from annual amounts due to the required method of computing the weighted average shares for the respective periods.