Note 9 - Derivative Instruments (Details) - Foreign Currency Forward Contract Derivative Instrument Amounts In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2014 USD ($)	Mar. 31, 2014 GBP (£)	Dec. 31, 2013 USD ($)
Derivative Assets
Great Britain Pound	$ 5,000	£ 3,107	$ 9,500
Great Britain Pound	100.00%	100.00%
Great Britain Pound	Jun. 30, 2014	Jun. 30, 2014

Fair value as of the balance sheet date of all foreign currency derivative assets designated as cash flow hedging instruments.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4B

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant