Note 12 - Income Taxes (Details) - Deferred Taxes (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred Tax Assets, Allowance for Doubtful Accounts [Member] | Current [Member]
Deferred tax assets:
Allowance for doubtful accounts	$ 2,784	$ 2,415
Deferred Tax Assets, Loss on Interest Rate Swap [Member] | Current [Member]
Deferred tax assets:
Loss on interest rate swap		40
Deferred Tax Assets,Basis Difference of Intangible Assets [Member] | Noncurrent [Member]
Deferred tax assets:
Basis difference of intangible assets	6,220
Deferred Tax Assets, Net Operating Loss Carryforwards [Member] | Noncurrent [Member]
Deferred tax assets:
Net operating loss carryforwards	489	144
Deferred Tax Assets, Share-based Compensation [Member] | Noncurrent [Member]
Deferred tax assets:
Shared-based compensation	10,930	8,112
Deferred Tax Assets, Foreign Currency Translation [Member] | Noncurrent [Member]
Deferred tax assets:
Foreign currency translation	4,221	60
Deferred Tax Assets, Other [Member] | Current [Member]
Deferred tax assets:
Other deferred tax assets	476	440
Deferred Tax Assets, Other [Member] | Noncurrent [Member]
Deferred tax assets:
Other deferred tax assets	991	1,303
Deferred Tax Liabilities, Basis Difference of Intangible Assets [Member] | Noncurrent [Member]
Deferred tax liabilities:
Basis difference of intangible assets		(1,606)
Deferred Tax Liabilities, Basis Difference of Property and Equipment [Member] | Noncurrent [Member]
Deferred tax liabilities:
Basis difference of property and equipment	(1,194)	(1,364)
Deferred Tax Liabilities, Cash to Accrual Adjustments [Member] | Current [Member]
Deferred tax liabilities:
Cash to accrual adjustments	(2,426)	(2,363)
Deferred Tax Liabilities, Cash to Accrual Adjustments [Member] | Noncurrent [Member]
Deferred tax liabilities:
Cash to accrual adjustments	(166)	(2,467)
Deferred Tax Liabilities, Other [Member] | Current [Member]
Deferred tax liabilities:
Other deferred tax liabilities	(401)	(516)
Other deferred tax liabilities	(401)	(516)
Deferred Tax Liabilities, Other [Member] | Noncurrent [Member]
Deferred tax liabilities:
Other deferred tax liabilities		(9)
Other deferred tax liabilities		(9)
Current [Member]
Deferred tax assets:
Total deferred tax assets	3,260	2,895
Deferred tax liabilities:
Total deferred tax liabilities	(2,827)	(2,879)
Net deferred tax assets	433	16
Noncurrent [Member]
Deferred tax assets:
Total deferred tax assets	22,851	9,619
Deferred tax liabilities:
Total deferred tax liabilities	(1,360)	(5,446)
Net deferred tax assets	$ 21,491	$ 4,173