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Note 9 - Acquisitions and Subsidiaries and Joint Ventures with Noncontrolling Owners' Interests (Detail) (USD $) | 1 Months Ended | 3 Months Ended | 7 Months Ended | 12 Months Ended | 60 Months Ended |  |  | 12 Months Ended | 4 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended |  | 3 Months Ended | 4 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Aug. 31, 2011 | Mar. 31, 2013 | Mar. 31, 2012 | Jul. 31, 2016 | Dec. 31, 2012 | Dec. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2009 | Dec. 31, 2012 Minimum [Member] | Dec. 31, 2012 Maximum [Member] | Apr. 30, 2013 Final Payment [Member] RLW [Member] | Dec. 31, 2012 Aggregate Industries-SWR [Member] | Dec. 31, 2012 RHB [Member] | Dec. 31, 2012 RHB [Member] | Apr. 27, 2012 RHB [Member] | Mar. 30, 2012 RLW [Member] | Mar. 31, 2012 RLW [Member] | Apr. 30, 2013 RLW [Member] | Sep. 30, 2012 RLW [Member] | Dec. 31, 2012 RLW [Member]
Noncontrolling Interest, Description |  |  |  |  |  |  |  |  |  |  |  | six |  |  |  |  |  |  |  |
Deferred Revenue |  |  |  |  | $ 25,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-Compete Agreement Term |  |  |  |  | 2 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent |  |  |  |  |  |  |  |  |  |  |  |  | 50.00% | 50.00% | 50.00% |  |  |  |  | 20.00%
Long-term Line of Credit |  |  |  |  |  |  |  |  |  |  |  |  | 5,000,000 | 5,000,000 |  |  |  |  |  |
Noncontrolling Interests Offer To Buy Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  | 50.00% |  |  |  |  |  |
Noncontrolling Interests Offer To Sell Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  | 50.00% |  |  |  |  |  |
Adjustments to Additional Paid in Capital, Other |  |  |  |  |  |  |  |  |  |  |  |  | 233,000 | 3,000,000 |  |  |  |  |  |
Business Acquisition, Cost of Acquired Entity, Cash Paid |  |  |  |  |  |  |  |  |  |  |  |  | 9,800,000 | 9,800,000 |  |  |  |  |  |
Business Acquisition, Purchase Price Allocation, Deferred Tax Liabilities, Noncurrent |  |  |  |  |  |  |  |  |  |  |  |  | 360,000 | 360,000 |  |  |  |  |  |
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage | 80.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition Additional Price Payments | 5,000,000 |  |  |  |  |  |  |  |  |  | 509,000 |  |  |  |  |  |  | 23.1 |  |
Business Acquisition Additional Price Payments Term | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition Earn-Out Percentage | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition Earn-Out Calculated Floor |  |  |  | 1,200,000 |  | 2,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Forcasted EBITDA Percentage |  | 0.00% |  |  |  |  | 38.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability |  | 2,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition Undiscounted Earn-Out Liability |  | 2,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition Undiscounted Earn-Out Liability Increase |  | 2,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
EBITDA Earn-Out Increase Floor |  | 5,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  |  |  |  |  |  | 20.00% |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition Purchase Price Multiplier |  |  |  |  |  |  |  |  | 4 | 4.5 |  |  |  |  |  |  |  |  |  |
Interest Expense, Other |  |  | 248,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Put/Call Liability |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 463,000 |  |  |
Other Tax Expense (Benefit) |  |  |  |  | 162,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Owners' Interest In Earnings of Subsidiaries and Joint Ventures |  | 161,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | 25,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Attributable to Other Noncontrolling Interests |  | 186,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income (Loss) from Continuing Operations Attributable to Noncontrolling Interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6.7 |  |  |  |
Increase (Decrease) in Income Taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2.4 |

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- Definition Current portion of liability for noncontrolling owners' interests in subsidiaries and joint ventures, including rights to put remaining ownership interest to the company + References No definition available. + Details
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- Definition Noncontrolling Interests Offer To Buy Percentage. + References No definition available. + Details
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- Definition Amount of cash paid to acquire the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 68 -Subparagraph f(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition This element represents the amount of any change, including any differences arising upon settlement, recognized during the reporting period in the value of a liability, arising from an item of contingent consideration, assumed in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e7008-128479 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 72 -Subparagraph b -Clause 1 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 13.A.4(a).Q1 Response) -URI http://asc.fasb.org/extlink&oid=6600647&loc=d3e214044-122780 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 13 -Section A + Details
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- Definition Amount of income (loss) from continuing operations attributable to the noncontrolling interest. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4568447-111683 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 25 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 29 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The increase (decrease) during the reporting period in the amounts payable to taxing authorities for taxes that are based on the reporting entity's earnings, net of amounts receivable from taxing authorities for refunds of overpayments or recoveries of income taxes, and in deferred and other tax liabilities and assets. + References No definition available. + Details
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- Definition Interest expense on all other items not previously classified. For example, includes dividends associated with redeemable preferred stock of a subsidiary that is treated as a liability in the parent's consolidated balance sheet. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 01-6 -Paragraph 14 -Subparagraph l -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-BRD -Paragraph 55 -IssueDate 2006-05-01 -Chapter 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Section 563c.102 -Paragraph 6 -Chapter V -Subsection II -LegacyDoc This is a non-GAAP reference that was included in the 2009 taxonomy. It will be removed from future versions of this taxonomy. + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 + Details
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- Definition Description of noncontrolling interest which might include background information, terms of the ownership arrangement, and type and terms of equity interest owned by the noncontrolling interest holders. + References No definition available. + Details
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- Definition The component of income tax expense representing amounts paid or payable (or refundable) which are classified as "income taxes" as determined by applying the provisions of enacted tax law to other than the taxable Income or Loss from continuing operations for the period. Items affecting income taxes and required to be disclosed, but not included elsewhere, would also be designated as "Other". + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph c, d, e, f -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32672-109319 + Details
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