For an unclassified balance sheet, the accumulated amortization, as of the reporting date, representing the periodic charge to earnings of deferred costs which are associated with debt obligations existing as of the end of the period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.17)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 17

-Article 5

Summary of Significant Accounting Policies (Details Textual) (USD $)	3 Months Ended	12 Months Ended
	Jun. 30, 2012	Dec. 31, 2012 State province Hospital	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Property, Plant and Equipment [Line Items]
Depreciation expense adjustment	$ 3,100,000	$ 3,100,000
Valuation Allowances and Reserves, Balance		16,546	14,978	13,801	13,015
Unrecognized Tax Benefit		We did not have any unrecognized tax benefits
Summary of Significant Accounting Policies (Textual) [Abstract]
Number of animal hospitals where management services are provided		177
Number of states in which management services are provided to animal hospitals		15
Maturity period of cash equivalents		less than 90 days
Depreciation and amortization of property under capital leases		53,500,000	43,600,000	36,700,000
Goodwill impairment		99,501,000	21,310,000	0
Likelihood of benefit amount being realized upon settlement in order to be recognized as a tax benefit		greater than 50%
Accumulated amortization of deferred financing cost		1,300,000	482,000
Total marketing and advertising expense included in direct costs		25,300,000	25,200,000	21,700,000
Total marketing and advertising expenses included in selling, general and administrative expense		7,600,000	3,200,000	2,800,000
Accrued warranty costs		70,000	50,000
Common shares excluded from the computation of diluted earnings per share		1,000,000	1,200,000	11,763
Recognition of previously deferred revenue resulting from error correction			4,000,000
Recognition of previously deferred costs in Medical Technology segment resulting from error correction			3,800,000
Minimum [Member]
Property, Plant and Equipment [Line Items]
note receivable interest rate		3.90%
Maximum [Member]
Property, Plant and Equipment [Line Items]
note receivable interest rate		8.00%
Notes Receivable [Member]
Property, Plant and Equipment [Line Items]
Valuation Allowances and Reserves, Balance		$ 0