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Note 2 - Acquisitions and Subsidiaries and Joint Ventures with Noncontrolling Owners' Interests (Tables)
 12 Months Ended
Dec. 31, 2014
Noncontrolling Interest [Abstract]  
Schedule of Components of Agreement Obligation [Table Text Block]
   
Years Ended December 31,
 
   
2014
   
2013
 
Member’s interest subject to mandatory redemption
  $ 20,000     $ 20,000  
Undistributed earnings attributable to this interest
    6,079       3,989  
Earnings distributed
    (3,200 )     -  
Total liability
  $ 22,879     $ 23,989  
Schedule of Changes in Noncontrolling Interests and Joint Ventures [Table Text Block]
   
Years Ended December 31,
 
   
2014
   
2013
   
2012
 
Balance, beginning of period
  $ 4,097     $ 20,046     $ 18,375  
Net income attributable to noncontrolling interest included in liabilities
    -       2,024       16,941  
Net income attributable to noncontrolling interest included in equity
    4,556       1,879       1,068  
Accretion of interest on puts
    -       -       993  
Change in fair value of RLW put/call
    -       (59 )     3,797  
Change in fair value of RHB put/call
    -       1,875       2,473  
Change due to the RHB amendment
    -       (18,103 )     -  
Issuance of noncontrolling interest in RHB in exchange for net assets of acquired companies
    -       -       9,767  
Distributions to noncontrolling interests owners
    (1,191 )     (3,056 )     (10,185 )
Acquisition of RLW noncontrolling interest
    -       (509 )     (23,144 )
Other
    -       -       (39 )
Balance, end of period
  $ 7,462     $ 4,097     $ 20,046