Note 2 - Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2013

Significant Accounting Policies [Text Block]

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	Six months ended June 30, 2013
Volatility		48.66	to	48.83	%
Expected life (years)			6.00
Risk-free interest rate		0.97	to	1.02	%
Dividend yield			—
Fair value	$	6.63	to	8.39

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

		Number of		Weighted average exercise		Weighted average remaining contractual		Aggregate intrinsic value
	options			price		life (years)		(in thousands)
Outstanding at December 31, 2012		9,463,657		$	11.76
Options granted		425,800			14.91
Options forfeited		(268,883	)		15.61
Options exercised		(727,181	)		8.32
Outstanding at June 30, 2013		8,893,393		$	12.09		7.7	$	84,991
Exercisable at June 30, 2013		5,246,938		$	11.30		7.2	$	54,529

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

	Number of awards			Weighted average grant date fair value
Non-vested awards at December 31, 2012		189,412		$	13.68
Awards granted		589,010			14.59
Awards vested		(36,850	)		14.24
Awards forfeited		(19,090	)		14.06
Non-vested awards at June 30, 2013		722,482		$	14.38

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	Level 1		Level 2		Level 3		Total
As of December 31, 2012
Financial instruments:
Interest rate swap	$	—	$	101	$	—	$	101
Contingent consideration		—		—		846		846
As of June 30, 2013
Financial instruments:
Interest rate swap	$	—	$	7	$	—	$	7
Contingent consideration		—		—		863		863

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

	Foreign Currency Translation			Net investment hedge - foreign exchange contract		Net investment hedge - Australian denominated debt			Total
Balance at January 1, 2013	$	3,356		$	—	$	(173	)	$	3,183
Other comprehensive income (loss), net of tax		(12,664	)		2,303		379			(9,982	)
Balance at June 30, 2013	$	(9,308	)	$	2,303	$	206		$	(6,799	)