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Note 9 - Acquisitions and Subsidiaries and Joint Ventures with Noncontrolling Owners' Interests (Details) (USD $)
 1 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended 3 Months Ended 9 Months Ended 1 Months Ended
Aug. 31, 2011
Sep. 30, 2014
Mar. 31, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Jan. 23, 2014
Dec. 31, 2013
Sep. 30, 2014
Other Operating Income Net [Member]
Sep. 30, 2014
Other Operating Income Net [Member]
Sep. 30, 2014
Interest Income [Member]
Dec. 30, 2013
Upon Death [Member]
CEO Of RHB [Member]
Dec. 30, 2013
Upon Permanent Disability [Member]
CEO Of RHB [Member]
Jan. 23, 2014
Before Amendment [Member]
Aug. 31, 2011
Years 2011 To 2015 [Member]
Aug. 31, 2011
Sep. 30, 2014
Minimum [Member]
Sep. 30, 2014
Maximum [Member]
Jan. 31, 2012
RHB [Member]
Sep. 30, 2013
RHB [Member]
Sep. 30, 2013
RHB [Member]
Apr. 27, 2012
RHB [Member]
Jun. 20, 2014
RHB Inc [Member]
Jan. 31, 2012
SWR Inc [Member]
Note 9 - Acquisitions and Subsidiaries and Joint Ventures with Noncontrolling Owners' Interests (Details) [Line Items]                                                
Number Of Assumed Construction Contracts                                               6
Deferred Revenue                                               $ 25,000,000
Non-Compete Agreement Term                                               2 years
Noncontrolling Interest, Ownership Percentage by Parent                                           50.00%    
Long-term Line of Credit                                     5,000,000          
Noncontrolling Interests Offer To Buy Percentage                                     50.00%          
Noncontrolling Interests Offer To Sell Percentage                                     50.00%          
Liquidation Value Multiplier                                     4.5          
Revaluation Pre-Tax Charge                                       1,200,000 1,900,000      
Revaluation Charge, Net of Tax                                       800,000 1,200,000      
Obligation To Purchase Member Interest                       20,000,000 18,000,000                      
Obligation To Purchase Percentage Member Interest                       50.00%                        
Cash Surrender Value of Life Insurance                       20,000,000                        
Increase (Decrease) In Undistributed Earnings                 500,000 2,000,000                            
  2,000,000     3,200,000                                      
Member Interest Sold, Percentage                                             50.00%  
Business Acquisition Additional Price Payments 5,000,000                                              
Business Acquisition Earn-Out Percentage 50.00%                                              
Business Acquisition Earn-Out Calculated Floor                             2,000,000 1,200,000                
Business Acquisition Undiscounted Earn Out Liability Decrease             600,000                                  
Business Acquisition Undiscounted Earn-Out Liability   300,000     300,000     1,400,000                                
Business Acquisition Earn Out Payment     800,000                                          
Business Acquisition Total Available Earn-Out Liability             10,000,000             5,000,000                    
EBITDA Earn Out Decrease Floor             1,500,000                                  
EBITDA Earn-Out Increase Floor   17,900,000     17,900,000   2,000,000                                  
Forcasted EBITDA Percentage                                 0.00% 22.00%            
Business Acquisition Cost Of Acquired Entity Discounted Present Value Of Additional Purchase Price         300,000                                      
Revaluation Benefit                     300,000                          
Business Acquisition Undiscounted Earn-Out Liability Increase   9,000,000     9,000,000                                      
Net Income (Loss) Attributable to Noncontrolling Interest   1,718,000   2,284,000 3,238,000 3,250,000                                    
Payments to Noncontrolling Interests   $ 0     $ 1,190,000 $ 3,244,000