The following tables set forth a summary of the Company’s selected quarterly financial information for each of the four quarters ended December 31, 2018 and 2017 (in thousands, except for per share data):


	2018 Quarters
	First			Second			Third			Fourth
Net revenue	$	901,857		$	915,918		$	896,652		$	932,696

Operating expenses:
Practice salaries and benefits		631,830			620,980			625,717			657,061
Practice supplies and other operating expenses		30,655			31,833			30,159			29,381
General and administrative expenses		108,776			107,908			102,905			112,789
Depreciation and amortization		26,163			26,518			28,709			29,891

Total operating expenses		797,424			787,239			787,490			829,122

Income from operations		104,433			128,679			109,162			103,574
Investment and other income		1,464			1,202			1,302			967
Interest expense		(19,935	)		(21,604	)		(21,782	)		(25,448	)
Equity in earnings of unconsolidated affiliates		1,525			1,257			1,766			2,277

Total non-operating expenses		(16,946	)		(19,145	)		(18,714	)		(22,204	)
Income before income taxes		87,487			109,534			90,448			81,370
Income tax provision		(24,059	)		(30,122	)		(24,873	)		(21,156	)

Net income	$	63,428		$	79,412		$	65,575		$	60,214

Per common and common equivalent share data (1):
Net income:
Basic	$	0.68		$	0.85		$	0.72		$	0.69

Diluted	$	0.68		$	0.85		$	0.72		$	0.68

Weighted average common shares:
Basic		92,859			92,987			90,984			87,810

Diluted		93,505			93,529			91,359			88,258

(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.


	2017 Quarters
	First			Second			Third			Fourth
Net revenue	$	835,597		$	842,944		$	868,951		$	910,820

Operating expenses:
Practice salaries and benefits		572,385			561,418			586,476			617,455
Practice supplies and other operating expenses		27,796			30,872			29,497			32,353
General and administrative expenses		103,765			103,015			101,430			108,895
Depreciation and amortization		25,614			25,735			25,116			26,414

Total operating expenses		729,560			721,040			742,519			785,117

Income from operations		106,037			121,904			126,432			125,703
Investment and other income		576			365			235			2,777
Interest expense		(17,752	)		(18,535	)		(18,428	)		(19,844	)
Equity (loss) in earnings of unconsolidated affiliate		797			689			(240	)		(294	)

Total non-operating expenses		(16,379	)		(17,481	)		(18,433	)		(17,361	)
Income before income taxes		89,658			104,423			107,999			108,342
Income tax (provision) benefit		(34,967	)		(40,725	)		(42,119	)		27,761

Net income	$	54,691		$	63,698		$	65,880		$	136,103

Per common and common equivalent share data (2):
Net income:
Basic	$	0.59		$	0.69		$	0.71		$	1.47

Diluted	$	0.59		$	0.69		$	0.71		$	1.46

Weighted average common shares:
Basic		92,360			92,181			92,589			92,756

Diluted		93,143			92,812			92,881			93,159

(2)	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.