Derivative Instruments (Details) (USD $)	12 Months Ended									1 Months Ended	12 Months Ended						0 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Foreign Currency Hedge Contract [Member] Designated as Hedging Instrument [Member]	Dec. 31, 2011 Foreign Currency Hedge Contract [Member] Designated as Hedging Instrument [Member]	Dec. 31, 2010 Foreign Currency Hedge Contract [Member] Designated as Hedging Instrument [Member]	Dec. 31, 2012 Foreign Currency Hedge Contract [Member] Not Designated as Hedging Instrument [Member]	Dec. 31, 2011 Foreign Currency Hedge Contract [Member] Not Designated as Hedging Instrument [Member]	Dec. 31, 2010 Foreign Currency Hedge Contract [Member] Not Designated as Hedging Instrument [Member]	Jun. 30, 2012 Planetsoft [Member]	Dec. 31, 2012 Planetsoft [Member]	Jun. 02, 2012 Planetsoft [Member] Stockholders	May 31, 2012 Planetsoft [Member] Stockholders	Dec. 31, 2012 Planetsoft [Member] Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 2 [Member]	Jun. 02, 2012 Planetsoft [Member] Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 2 [Member]	May 31, 2012 Planetsoft [Member] Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 2 [Member]	Oct. 02, 2009 E-Z Data [Member]	Dec. 31, 2011 E-Z Data [Member]	Dec. 31, 2010 E-Z Data [Member]	Oct. 02, 2009 E-Z Data [Member] Fair Value, Measurements, Recurring [Member] Fair Value, Inputs, Level 2 [Member]
Derivative [Line Items]
Change in unrealized gain (loss) on foreign currency fair value hedging instruments				$ 1,200,000	$ (2,600,000)	$ 1,300,000
Foreign currency transaction, realized gain (loss)							776,000	6,900,000	(93,000)
Number of shareholders												3	3
Put option, exercise period										30 days							30 days
Put option, vesting period required prior to exercise										2 years							2 years
Shares that may be repurchased under put option										296,560
Put option, price to repurchase shares										$ 16.86							$ 15.11
Put option, price to repurchase shares, discount										10.00%							10.00%
Put option liability	1,186,000	0												1,200,000	1,400,000	1,400,000				6,600,000
Change in fair value of put option	$ 191,000	$ 537,000	$ 6,059,000								$ 191,000							$ (537,000)	$ (6,100,000)