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Note 2 - Acquisitions and Subsidiaries and Joint Ventures with Noncontrolling Owners' Interests (Detail) (USD $)
 1 Months Ended 3 Months Ended 12 Months Ended 4 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 12 Months Ended 1 Months Ended 5 Months Ended 12 Months Ended 12 Months Ended
Sep. 30, 2011
Dec. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2012
RHB [Member]
Dec. 31, 2012
JBC [Member]
Dec. 31, 2012
SWR, Inc. [Member[
Apr. 27, 2012
RHB [Member]
Buy [Member]
Apr. 27, 2012
RHB [Member]
Dec. 31, 2012
RHB [Member]
Dec. 31, 2011
Minimum [Member]
RHB [Member]
Dec. 31, 2012
Minimum [Member]
JBC [Member]
Dec. 31, 2012
Minimum [Member]
RLW [Member]
Dec. 31, 2011
Maximum [Member]
RHB [Member]
Aug. 31, 2011
Maximum [Member]
JBC [Member]
Dec. 31, 2012
Maximum [Member]
RLW [Member]
Oct. 31, 2007
RHB [Member]
Dec. 31, 2012
RHB [Member]
Dec. 31, 2011
RHB [Member]
Mar. 17, 2011
RHB [Member]
Dec. 31, 2012
Contracts Assumed [Member]
Aug. 31, 2012
JBC [Member]
Aug. 31, 2011
JBC [Member]
Dec. 31, 2011
JBC [Member]
Dec. 31, 2012
JBC [Member]
Dec. 31, 2012
RLW [Member]
Dec. 31, 2011
RLW [Member]
Dec. 31, 2010
RLW [Member]
Dec. 31, 2011
Myers [Member]
Dec. 31, 2012
Myers [Member]
Dec. 31, 2012
RLW [Member]
Dec. 31, 2011
RLW [Member]
Dec. 31, 2012
RHB [Member]
Dec. 31, 2012
Myers [Member]
Number of Assumed Construction Contracts               6                                                      
Deferred Revenue               $ 25,000,000                                                      
Non-Compete Agreement Term                     2 years                                                
Business Acquisition, Percentage of Voting Interests Acquired                   50.00%                                                  
Business Acquisition Cost Of Acquired Entity Repurchase Percentage                 50.00% 50.00%                           50.00%                      
Business Acquisition Pre-Tax Adjustment           2.5                                                          
Long-term Line of Credit           5,000,000                                                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net                                     9,800,000                                
Adjustments to Additional Paid in Capital, Other                                     233,000                                
Equity Method Investment, Ownership Percentage     3.00%                                     50.00%       80.00%                  
Business Acquisition, Purchase Price Allocation, Deferred Tax Assets, Noncurrent                                     360,000                                
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual                                           26,100,000                          
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual                                                   152,000                  
Business Acquisition Additional Price Payments Term                                             5 years                        
Business Acquisition, Cost of Acquired Entity, Period                                               5 years                      
EBITDA Earn-Out Increase Floor             5,200,000                                 2,000,000                      
Forcasted EBITDA Percentage                         0.00%     205.00%                                      
Business Acquisition, Cost of Acquired Entity, Discounted Present Value of Additional Purchase Price                                                 2,400,000   2,300,000                
Business Acquisition Undiscounted Earn-Out Liability                                                   2,400,000                  
Business Acquisition Undiscounted Earn-Out Liability Increase                                                   2,600,000                  
BusinessAcquisitionPurchasePriceAllocBusinessAcquisitionPurchasePriceAllocationGoodwillDBusiness Acquisition Purchase Price Allocation Goodwill Deductible TermeductibleTermationGoodwillDeductibleTerm             15 years                       15 years                     15 years          
Fair Value of Assets Acquired     3,800,000                                 2,100,000                              
Noncontrolling Interest, Ownership Percentage by Parent   98.00%   98.00%                                                   50.00% 50.00%        
Business Acquisition, Cost of Acquired Entity, Transaction Costs                                                           128,000          
Business Acquisition Remaining Percentage Of Voting Interests                                   91.67%   8.33%               20.00%              
Business Acquisition Purchase Price Percentage                                                       20.00%              
Business Acquisition Purchase Price Multiplier                           4     4.5                                    
Accretion Expense                                                     993,000 881,000 807,000            
Increase (Decrease) in Put/Call Liability                                                               3,800,000 1,300,000    
Other Tax Expense (Benefit)                                                               1,300,000 500,000    
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners                       8.33%                 8.33%           20.00%                
Business Acquisition, Cost of Acquired Entity, Cash Paid                                                     23,100,000                
Business Acquisition Additional Price Payments                                                     568,000                
Business Acquisition Purchase Price Increase                       7,100,000                                              
Business Acquisition Purchase Settled                             8,200,000         1,100,000                              
Noncontrolling Interest, Change in Redemption Value 8,200,000                                                                    
Extraordinary Item, Gain (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest (in Dollars)   41,800,000 18,000,000                                                                
Net Income (Loss) Attributable to Noncontrolling Interest     (18,009,000) (1,196,000) (7,137,000)                                                     15,000,000   1,900,000  
Income (Loss) from Continuing Operations Attributable to Noncontrolling Interest                                                               $ 6,700,000     $ 1,100,000