Lines of Business (Tables)

6 Months Ended

Jun. 30, 2012

Segment Reporting [Abstract]

Lines of Business

	Animal Hospital			Laboratory			All Other		Corporate			Intercompany Eliminations			Total
Three Months Ended June 30, 2012
External revenue	$	342,282		$	72,452		$	23,638	$	—		$	—		$	438,372
Intercompany revenue	—			14,168			3,780		—			(17,948		)	—
Total revenue	342,282			86,620			27,418		—			(17,948		)	438,372
Direct costs	292,902			44,324			17,624		—			(17,085		)	337,765
Gross profit	49,380			42,296			9,794		—			(863		)	100,607
Selling, general and administrative expense	7,995			7,510			9,029		14,463			—			38,997
Net (gain) loss on sale and disposal of assets	(112		)	(7		)	232		(1		)	—			112
Operating income (loss)	$	41,497		$	34,793		$	533	$	(14,462	)	$	(863	)	$	61,498
Depreciation and amortization	$	15,239		$	2,521		$	2,582	$	804		$	(345	)	$	20,801
Property and equipment additions	$	15,297		$	2,282		$	1,048	$	3,008		$	(542	)	$	21,093
Three Months Ended June 30, 2011
External revenue	$	291,332		$	72,955		$	11,818	$	—		$	—		$	376,105
Intercompany revenue	—			11,430			4,391		—			(15,821		)	—
Total revenue	291,332			84,385			16,209		—			(15,821		)	376,105
Direct costs	238,392			43,716			11,419		—			(14,254		)	279,273
Gross profit	52,940			40,669			4,790		—			(1,567		)	96,832
Selling, general and administrative expense	6,044			6,853			3,584		10,182			—			26,663
Net loss on sale and disposal of assets	51			7			2		—			—			60
Operating income (loss)	$	46,845		$	33,809		$	1,204	$	(10,182	)	$	(1,567	)	$	70,109
Depreciation and amortization	$	9,533		$	2,508		$	668	$	685		$	(318	)	$	13,076
Property and equipment additions	$	13,236		$	1,728		$	258	$	1,627		$	(449	)	$	16,400