Note 13 - Redeemable Non-controlling Interests (Details) - Reconciliation of the Beginning and Ending NCI Amounts (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Redeemable Noncontrolling Interest [Line Items]
Balance, January 1	$ 222,073	$ 147,751
RNCI share of earnings	28,200	18,027	13,741
RNCI redemption increment	19,420	41,430	21,131
Distributions paid to RNCI	25,956	22,001	16,321
Other	36,616	57,570	34,478
Balance, December 31	230,992	222,073
Noncontrolling Interest Share Of Earnings [Member]
Redeemable Noncontrolling Interest [Line Items]
RNCI share of earnings	22,539	13,976
Noncontrolling Interest Redemption Increment [Member]
Redeemable Noncontrolling Interest [Line Items]
RNCI redemption increment	19,420	41,430
Noncontrolling Interest Distributions Paid To NCI [Member]
Redeemable Noncontrolling Interest [Line Items]
Distributions paid to RNCI	(21,421)	(17,878)
Noncontrolling Interest Purchase Of Interests From NCI Net [Member]
Redeemable Noncontrolling Interest [Line Items]
Purchases of interests from RNCI, net	(31,677)	(5,242)
Noncontrolling Interest Recognized On Business Acquisitions [Member]
Redeemable Noncontrolling Interest [Line Items]
RNCI recognized on business acquisitions	19,376	43,531
Noncontrolling Interest Share Of Other Comprehensive Earnings [Member]
Redeemable Noncontrolling Interest [Line Items]
Other	$ 682	$ (1,495)

This element represents the fair value of the noncontrolling interest in the acquiree at the acquisition date.

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income (loss) and other comprehensive income (loss), attributable to noncontrolling interests. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount of Net Income (Loss) attributable to noncontrolling interest.

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Portion of equity (net assets) in a subsidiary not attributable, directly or indirectly, to the parent entity which is not redeemable by the parent entity.

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The cash outflow during the period for redemption of redeemable noncontrolling interests.

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Amount of cash outflow in the form of ordinary dividends provided by the non-wholly owned subsidiary to noncontrolling interests.

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As of the reporting date, the aggregate carrying amount of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity.

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- Definition

Amount of decrease to net income for accretion of temporary equity to its redemption value to derive net income apportioned to common stockholders.

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