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Debt - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended |  | 1 Months Ended | 6 Months Ended |  |  | 1 Months Ended | 6 Months Ended |  |  | 6 Months Ended |
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Dec. 31, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Nov. 30, 2011 | Nov. 30, 2011 Revolving credit facility [Member] | Dec. 31, 2012 Revolving credit facility [Member] | Jun. 30, 2012 Revolving credit facility [Member] | Dec. 31, 2012 Revolving credit facility [Member] Maximum [Member] | Dec. 31, 2012 Revolving credit facility [Member] Minimum [Member] | Nov. 30, 2011 Term loan [Member] | Dec. 31, 2012 Term loan [Member] | Jun. 30, 2012 Term loan [Member] | Dec. 31, 2012 Term loan [Member] Maximum [Member] | Dec. 31, 2012 Term loan [Member] Minimum [Member] | Dec. 31, 2012 First Amendment [Member] | Dec. 31, 2012 Interest rate swap [Member] | Dec. 31, 2012 Subsequent Event [Member] | Dec. 31, 2012 Subsequent Event [Member] Maximum [Member] | Dec. 31, 2012 Subsequent Event [Member] Revolving credit facility [Member]
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition of businesses |  |  | $ 3.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net of imputed interest amounts |  |  | 0.1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accretion of promissory notes recorded in interest expense | 0.1 |  | 0.2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving credit facility, total |  |  |  | 300.0 | 100.0 | 200.0 |  |  |  |  |  |  |  |  |  |  |  |  | 200.0
Percentage of amortization with principal of credit facility year one |  |  |  |  |  |  |  |  |  | 5.00% |  |  |  |  |  |  |  |  |
Percentage of amortization with principal of credit facility year two |  |  |  |  |  |  |  |  |  | 10.00% |  |  |  |  |  |  |  |  |
Percentage of amortization with principal of credit facility year three |  |  |  |  |  |  |  |  |  | 15.00% |  |  |  |  |  |  |  |  |
Percentage of amortization with principal of credit facility year four |  |  |  |  |  |  |  |  |  | 20.00% |  |  |  |  |  |  |  |  |
Percentage of amortization with principal of credit facility year five |  |  |  |  |  |  |  |  |  | 50.00% |  |  |  |  |  |  |  |  |
Period for credit facility |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Third Loan Amendment date |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Feb. 15, 2013 |  |
Goodwill impairments and non-recurring cash expenses included in adjusted EBITDA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.0 |
Revolving line of credit facility, current |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.0
Interest rate dependent upon the ratio of funded debt to adjusted EBITDA and ranges from Eurodollar Margin |  |  |  |  |  |  |  | 2.375% | 1.625% |  |  |  | 2.75% | 2.00% |  |  |  |  |
Prime rate for the revolving credit line |  |  |  |  |  | 1.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Prime rate for the term loan |  |  |  |  |  |  |  |  |  |  | 1.00% |  |  |  |  |  |  |  |
Percentage decrease in interest rate margins for new credit facility |  | 0.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving credit line requires an annual facility fee |  |  |  |  |  | 0.375% |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative notional amount outstanding in the swap agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 85.0 |  |  |
Amortization of principle amount of term loan |  | 35.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swap effectively fixes the Eurodollar Margin |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.97% |  |  |
Minimum fixed charge coverage ratio |  | 1.15 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum funded debt to adjusted EBITDA ratio |  | 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Upfront arrangement fees incurred in connection with the credit facility |  | 1.5 |  |  |  |  |  |  |  |  |  |  |  |  | 0.2 |  |  |  |
Outstanding amount |  |  |  |  |  | 0 | 0 |  |  |  | 95.0 | 97.5 |  |  |  |  |  |  |
Effective date of swap |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Apr. 09, 2012 |  |  |
Derivative maturity date |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Nov. 04, 2016 |  |  |
Notional amount outstanding in the swap agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 85.0 |  |  |
Fair value of the interest rate swap |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.4 |  |  |
Effective portion of the interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.4 |  |  |
Credit agreement with a financial institution that is used as collateral for fidelity bonds placed with an insurance company |  | 0.4 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit agreement with a financial institution that is used as collateral for the Company's corporate headquarters' operating lease |  | $ 0.5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Letters of credit automatically renew annually without amendment on the annual expiration date |  | 30 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

X
- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Accretion recorded as interest expense. + References No definition available. + Details
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- Definition Letters of credit for fidelity bonds. + References No definition available. + Details
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- Definition Maximum funded debt to adjusted EBITDA ratio. + References No definition available. + Details
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- Definition Minimum fixed charge coverage ratio. + References No definition available. + Details
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- Definition Outstanding balance of term loan after amortization. + References No definition available. + Details
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- Definition Percentage decrease in interest rate margins for new facility in comparison with previous credit facility. + References No definition available. + Details
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- Definition Upfront arrangement fees incurred in connection with the credit facility. + References No definition available. + Details
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- Definition The net gain (loss) during the reporting period due to ineffectiveness in interest rate cash flow hedges. Recognized in earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph b(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 current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Aggregate notional amount of all interest rate derivatives designated as hedging instruments in cash flow hedges. Notional amount refers to the monetary amount specified in the interest rate derivative contract. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579245-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Notional Amount -URI http://asc.fasb.org/extlink&oid=6519104 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5580258-113959 + Details
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- Definition The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 19 -Subparagraph b -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 Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 -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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3255-108585 + Details
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