Business Combinations (Narrative) (Details) (USD $)	3 Months Ended				3 Months Ended		0 Months Ended	1 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2014 Curepet, Inc. [Member] Companies	Jan. 27, 2014 Curepet, Inc. [Member]	Jun. 02, 2012 Planetsoft [Member]	Jun. 30, 2012 Planetsoft [Member]	Mar. 31, 2014 Fair Value, Inputs, Level 2 [Member] Fair Value, Measurements, Recurring [Member] Planetsoft [Member]	Jun. 02, 2012 Fair Value, Inputs, Level 2 [Member] Fair Value, Measurements, Recurring [Member] Planetsoft [Member]	Mar. 31, 2014 Contingent Accrued Earn-out Acquisition Consideration [Member]	Dec. 31, 2013 Contingent Accrued Earn-out Acquisition Consideration [Member]
Business Acquisition [Line Items]
Number of businesses acquired					1
Reduction of acquisition earnout accruals	$ (1,762,000)	$ (299,000)
Derivative Liability	14,376,000		14,420,000	17,495,000	1,600,000	5,000,000					14,376,000	17,495,000
Business acquisition, contingent consideration, at fair value, noncurrent	11,992,000		10,283,000								12,000,000	10,300,000
Business acquisition, contingent consideration, at fair value, current	2,384,000		4,137,000								2,400,000	4,100,000
Business acquisition, number of common shares issued							296,560
Business acquisition, price per share							$ 16.86
Share subscribed for business acquisition, Value							5,000,000
Put option, exercise period							30 days
Put option, vesting period required prior to exercise							2 years	2 years
Put option liability									400,000	1,400,000
Goodwill	$ 341,744,000		$ 337,068,000	$ 326,748,000