Summary of Significant Accounting Policies (Details) (USD $)	12 Months Ended
	Dec. 31, 2013 State province Hospital	Dec. 31, 2012	Dec. 31, 2011
Accounting Policies [Abstract]
Marketing and Advertising Expenses Direct Cost	$ 25,400,000	$ 25,300,000	$ 25,200,000
Number Of Animal Hospitals Where Management Services Are Provided	176
Number Of States In Which Management Services Are Provided To Animal Hospitals	15
Deferred revenue and costs
Deferred equipment revenue	811,000	735,000
Deferred fixed priced support or maintenance contract revenue	3,854,000	3,383,000
Other deferred revenue	6,578,000	6,828,000
Total deferred revenue	11,243,000	10,946,000
Deferred Revenue, Current	11,190,000	10,811,000
Long-term portion of deferred revenue included in other liabilities	53,000	135,000
Current portion of deferred costs included in prepaid expenses and other	502,000	709,000
Long-term portion of deferred costs included in other assets	698,000	1,099,000
Total deferred costs	1,200,000	1,808,000
Marketing And Advertising Expense Included In Selling General And Administrative	$ 5,900,000	$ 7,600,000	$ 3,200,000