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Note 2 - Acquisitions and Subsidiaries and Joint Ventures with Noncontrolling Owners' Interests (Details Textual) - USD ($)
 1 Months Ended 3 Months Ended 11 Months Ended 12 Months Ended
Jun. 02, 2015
Jun. 20, 2014
Jan. 23, 2014
Dec. 31, 2015
Mar. 31, 2015
Mar. 31, 2014
Nov. 30, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Nov. 28, 2015
Nov. 27, 2015
Aug. 01, 2011
Myers [Member] | Upon Death [Member]                          
Obligation to Purchase Member Interest                     $ 20,000,000    
Myers [Member] | Other Operating Income (Expense) [Member]                          
Undistributed Earnings, Basic       $ 500,000     $ 6,100,000            
Myers [Member]                          
Noncontrolling Interests, Option to Buy Company's 50% Interest Under Certain Conditions, Price               $ 10,000          
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners       50.00%       50.00%          
Noncontrolling Interest, Ownership Percentage by Parent       50.00%       50.00%          
Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Share Value, Amount, Noncurrent       $ 26,616,000       $ 26,616,000          
RHB [Member] | Other Operating Income (Expense) [Member]                          
Undistributed Earnings, Basic               3,800,000 $ 2,100,000        
RHB [Member]                          
Noncontrolling Interests, Option to Buy Company's 50% Interest Under Certain Conditions, Price               $ 10,000          
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners       50.00%       50.00%          
Noncontrolling Interest, Ownership Percentage by Parent       50.00%       50.00%          
Mandatory Redemption Earnings Distributed       $ 6,014,000       $ 6,014,000 3,200,000        
Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Share Value, Amount, Noncurrent       23,822,000       23,822,000 22,879,000        
RHB Inc. [Member] | CEO of RHB [Member]                          
Sale of Ancillary Company Equity Percentage   50.00%                      
CEO of RHB [Member] | Upon Death [Member]                          
Obligation to Purchase Member Interest                   $ 20,000,000      
Cash Surrender Value of Life Insurance                   20,000,000      
CEO of RHB [Member] | Upon Permanent Disability [Member]                          
Obligation to Purchase Member Interest       20,000,000       20,000,000   18,000,000      
CEO of RHB [Member]                          
Disability Insurance Policy, Term 5 years                        
Insurance Policy Disability Benefit Principal Amount $ 20,000,000                        
Clinton W. Myers [Member] | Upon Death [Member]                          
Cash Surrender Value of Life Insurance                     20,000,000    
Clinton W. Myers [Member]                          
Insurance Policy Disability Benefit Principal Amount                     $ 20,000,000    
Original Earnout Liability [Member] | JBC [Member]                          
Business Acquisition, Undiscounted Earn-Out Liability     $ 5,000,000                    
If Certain EBITDA Thresholds Are Met [Member] | JBC [Member]                          
Business Acquisition, Undiscounted Earn-Out Liability     10,000,000                    
For 2014 and 2015 [Member] | JBC [Member]                          
Business Acquisition, Earn-Out Calculated, Floor     1,500,000                    
For 2016 and 2017 [Member] | JBC [Member]                          
Business Acquisition, Earn-Out Calculated, Floor     2,000,000                    
Myers [Member]                          
Business Acquisition, Percentage of Voting Interests Acquired                         50.00%
Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Share Value, Amount, Noncurrent       26,100,000       26,100,000          
Adjustments to Additional Paid in Capital, Revaluation of Non-controlling Interest Put/Call Liability               (18,800,000)          
Stockholders' Equity Attributable to Noncontrolling Interest                       $ 7,300,000  
JBC [Member]                          
Business Acquisition, Undiscounted Earn-Out Liability Decrease     $ 600,000                    
Business Acquisition, Undiscounted Earn-Out Liability       0       0 300,000 1,400,000      
Business Acquisition, Earn-Out Payment           $ 800,000              
Business Acquisition, Cost of Acquired Entity Discounted Present Value of Additional Purchase Price                 300,000        
Business Acquisition, Undiscounted Earn-Out Liability Increase       9,300,000       9,300,000          
EBITDA Earn-Out Increase Floor               18,500,000          
Interest Income, Other         $ 300,000     300,000          
Current Obligations for Non-controlling Owners [Member]                          
Net Income Attributable to Non-controlling Interest Included in Liabilities                   100,000      
Members Interest Subject to Mandatory Redemption [Member]                          
Net Income Attributable to Non-controlling Interest Included in Liabilities                   2,100,000      
Mandatory Redemption Earnings Distributed       2,800,000       2,800,000 3,200,000        
Adjustments to Additional Paid in Capital, Revaluation of Non-controlling Interest Put/Call Liability               (26,141,000)   (7,686,000)      
Stockholders' Equity Attributable to Noncontrolling Interest       $ (91,000)       (91,000) 7,462,000        
Interest Income, Other               460,000 754,000 879,000      
Net Income (Loss) Attributable to Noncontrolling Interest               3,216,000 4,556,000 3,903,000      
Payments to Noncontrolling Interests               3,402,000 1,191,000 3,565,000      
Net Income Attributable to Non-controlling Interest Included in Liabilities                   2,024,000      
NetIncome Attributable to Non-controlling Interest Included in Equity               $ 3,216,000 $ 4,556,000 $ 1,879,000