Note 9 - Stockholders' Equity (Details) - Statement of Stockholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013
Note 9 - Stockholders' Equity (Details) - Statement of Stockholders' Equity [Line Items]
Balance	$ 1,495,813	$ 743,325	$ 1,500,421	$ 736,981
Net income (loss)	(7,433)us-gaap_NetIncomeLoss	5,385us-gaap_NetIncomeLoss
Exercise of stock options (in Shares)	1,035	394
Stock-based compensation	3,009	584
Revaluation of redeemable noncontrolling interest	(586)
Other (in Shares)	(633)	(19)
Common Stock [Member] \| Voting Common Stock [Member]
Note 9 - Stockholders' Equity (Details) - Statement of Stockholders' Equity [Line Items]
Balance	1,325,695	558,713	1,322,284	557,754
Exercise of stock options (in Shares)	1,035	394
Stock-based compensation	3,009	584
Other (in Shares)	(633)	(19)
Common Stock [Member] \| Nonvoting Common Stock [Member]
Note 9 - Stockholders' Equity (Details) - Statement of Stockholders' Equity [Line Items]
Balance		12,483		12,483
AOCI Attributable to Parent [Member]
Note 9 - Stockholders' Equity (Details) - Statement of Stockholders' Equity [Line Items]
Balance	(36,445)	5,668	(36,445)	5,668
Retained Earnings [Member]
Note 9 - Stockholders' Equity (Details) - Statement of Stockholders' Equity [Line Items]
Balance	206,563	166,461	214,582	161,076
Net income (loss)	(7,433)	5,385
Revaluation of redeemable noncontrolling interest	$ (586)

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Changes in additional paid in capital related to exercise of share-based payments awards (such as stock options) and the amount of recognized equity-based compensation during the period (such as nonvested shares).

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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