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Note 3 - Acquisitions (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Note 3 - Acquisitions (Details) [Line Items]      
Number of Businesses Acquired 11 5 6
$ 820    
Business Combination, Acquisition Related Costs 3,336 5,032 861
Business Acquisition, Goodwill, Expected Tax Deductible Amount 2,823 2,214 11,441
Business Combination, Contingent Consideration, Liability 8,740 13,000  
Previously Resolved Contingencies [Member] | Acquisitions After December 31, 2008 [Member]
      
Note 3 - Acquisitions (Details) [Line Items]      
Contingent Consideration Paid 658 2,451  
CRE Segment [Member]
      
Note 3 - Acquisitions (Details) [Line Items]      
Number of Businesses Acquired 8 2 1
RRE Segment [Member]
      
Note 3 - Acquisitions (Details) [Line Items]      
Number of Businesses Acquired 3 2 5
Property Services [Member]
      
Note 3 - Acquisitions (Details) [Line Items]      
Number of Businesses Acquired   1  
Acquisitions After December 31, 2008 [Member]
      
Note 3 - Acquisitions (Details) [Line Items]      
Business Combination, Contingent Consideration, Liability 8,740    
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low 10,500    
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High 12,600    
Contingent Consideration Paid 1,994 5,492 1,806
Contingent Consideration Payable, Resolved   658  
Previously Resolved Contigencies [Member]
      
Note 3 - Acquisitions (Details) [Line Items]      
Contingent Consideration Payable, Resolved 13,727    
Previously Resolved Contingencies [Member]
      
Note 3 - Acquisitions (Details) [Line Items]      
Compensation Element $ 12,009 $ 7,475