The following tables set forth a summary of the Company’s selected quarterly financial information for each of the four quarters ended December 31, 2013 and 2012 (in thousands, except for per share data):


	2013 Quarters
	First			Second			Third			Fourth
Net patient service revenue	$	502,715		$	529,180		$	554,730		$	567,387

Operating expenses:
Practice salaries and benefits		329,201			331,922			346,879			353,316
Practice supplies and other operating expenses		19,500			19,416			19,445			24,027
General and administrative expenses		53,318			54,601			54,654			55,636
Depreciation and amortization		9,144			9,870			10,461			10,491

Total operating expenses		411,163			415,809			431,439			443,470

Income from operations		91,552			113,371			123,291			123,917

Investment income		402			396			372			526
Interest expense		(1,189	)		(1,673	)		(1,507	)		(1,046	)

Income before income taxes		90,765			112,094			122,156			123,397

Income tax provision		35,398			42,876			45,198			44,423

Net income	$	55,367		$	69,218		$	76,958		$	78,974

Per common and common equivalent share data (1):
Net income:
Basic	$	0.56		$	0.70		$	0.77		$	0.79

Diluted	$	0.55		$	0.68		$	0.76		$	0.78

Weighted average shares:
Basic		98,618			99,116			99,506			99,469

Diluted		100,784			101,098			101,178			101,080

(1)	Basic and diluted per share amounts are computed for each of the periods presented. Accordingly, the sum of the quarterly per share amounts may not agree with the full year amount.


	2012 Quarters
	First			Second			Third			Fourth
Net patient service revenue	$	422,616		$	449,530		$	473,134		$	471,332

Operating expenses:
Practice salaries and benefits		272,261			275,951			292,030			290,671
Practice supplies and other operating expenses		16,985			17,956			17,606			19,276
General and administrative expenses		46,869			48,200			48,200			50,271
Depreciation and amortization		7,113			7,687			7,925			8,091

Total operating expenses		343,228			349,794			365,761			368,309

Income from operations		79,388			99,736			107,373			103,023

Investment income		428			365			422			681
Interest expense		(554	)		(848	)		(624	)		(1,219	)

Income before income taxes		79,262			99,253			107,171			102,485

Income tax provision		30,912			38,709			41,261			36,382

Net income	$	48,350		$	60,544		$	65,910		$	66,103

Per common and common equivalent share data (1):
Net income:
Basic	$	0.50		$	0.62		$	0.67		$	0.67

Diluted	$	0.49		$	0.61		$	0.66		$	0.66

Weighted average shares:
Basic		96,538			97,086			97,876			98,226

Diluted		98,798			99,090			99,618			100,212

(1)	Basic and diluted per share amounts are computed for each of the periods presented. Accordingly, the sum of the quarterly per share amounts may not agree with the full year amount.