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Note 3 - Acquisitions (Tables)
 12 Months Ended
Dec. 31, 2014
Business Combinations [Abstract]  
Schedule of Business Acquisitions, by Acquisition [Table Text Block]
 
 
Aggregate
Acquisitions
 
 
 
 
 
 
Current assets
 
$
 35,641
 
Non-current assets
 
 
 8,157
 
Current liabilities
 
 
 (45,980
)
Long-term liabilities
 
 
 (9,950
)
Redeemable non-controlling interest
 
 
 (19,376
)
Non-controlling interests
 
 
 (255
)
 
 
$
 (31,763
)
 
 
 
 
 
Note consideration
 
$
 (3,611
)
Cash consideration, net of cash acquired of $12,428
 
 
 (108,245
)
Acquisition date fair value of contingent consideration
 
 
 (17,838
)
Total purchase consideration
 
$
 (129,694
)
 
 
 
 
 
Acquired intangible assets
 
$
 53,746
 
Goodwill
 
$
 107,711
 
 
 
Aggregate
Acquisitions
 
 
 
 
 
 
Current assets
 
$
 25,723 
 
Non-current assets
 
 
 2,733 
 
Current liabilities
 
 
 (35,308
)
Long-term liabilities
 
 
 (18,155
)
Redeemable non-controlling interest
 
 
 (43,531
)
Non-controlling interests
 
 
 (3,629
)
 
 
$
 (72,167
)
 
 
 
 
 
Note consideration
 
$
 (776
)
Cash consideration, net of cash acquired of $22,984
 
 
 (37,735
)
Acquisition date fair value of contingent consideration
 
 
 (9,556
)
Total purchase consideration
 
$
 (48,067
)
 
 
 
 
 
Gain on revaluation of previously held equity investment
 
$
 (820
)
 
 
 
 
 
Acquired intangible assets
 
$
 52,244 
 
Goodwill
 
$
 68,810 
 
 
 
Aggregate
Acquisitions
 
 
 
 
 
 
Current assets
 
$
 30,427 
 
Non-current assets
 
 
 3,164 
 
Current liabilities
 
 
 (21,169
)
Long-term liabilities
 
 
 (1,080
)
Redeemable non-controlling interests
 
 
 (753
)
Non-controlling interests
 
 
 (1,153
)
 
 
$
 9,436 
 
 
 
 
 
 
Note consideration
 
$
 (655
)
Cash consideration, net of cash acquired of $419
 
 
 (19,153
)
Acquisition date fair value of contingent consideration
 
 
 (1,944
)
Total purchase consideration
 
$
 (21,752
)
 
 
 
 
 
Acquired intangible assets
 
$
 7,420 
 
Goodwill
 
$
 4,896 
 
Business Acquisition, Pro Forma Information [Table Text Block]
 
Revenues
 
Net earnings
from continuing
operations
 
 
 
 
   
 
 
Actual from acquired entities for 2014
  $
97,507
    $
3,578
 
Supplemental pro forma for 2014 (unaudited)
    2,815,188      
94,111
 
Supplemental pro forma for 2013 (unaudited)
    2,554,036      
58,335
 
Supplemental pro forma for 2012 (unaudited)
    2,385,375      
56,371