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Long-Term Debt (Narrative) (Details) (USD $) | 0 Months Ended | 3 Months Ended | 9 Months Ended |  | 0 Months Ended |  | 0 Months Ended | 9 Months Ended |  |  |  |  |  |  |  |
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Apr. 14, 2014 | Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 YTD [Member] | Apr. 14, 2014 Term Number One [Member] | Apr. 14, 2014 Term Number Two [Member] | Sep. 30, 2014 Term Number Two [Member] | Apr. 14, 2014 Term Number Three [Member] | Sep. 30, 2014 Minimum [Member] | Sep. 30, 2014 Maximum [Member] | Sep. 30, 2014 Prime Rate [Member] | Sep. 30, 2014 Libor [Member] | Sep. 30, 2014 Ratio Maximum Per Covenant [Member] | Apr. 14, 2014 Ratio Maximum Per Covenant [Member] | Sep. 30, 2014 Ratio Minimum Per Covenant [Member] | Sep. 30, 2014 Ratio Actual [Member] | Sep. 30, 2014 Revolving Credit Facility [Member] | Apr. 14, 2014 Revolving Credit Facility [Member] | Apr. 13, 2014 Revolving Credit Facility [Member] | Sep. 30, 2014 Revolving Credit Facility [Member] QTD [Member] | Feb. 27, 2014 Revolving Credit Facility [Member] Senior Unsecured Debt [Member] | Sep. 30, 2014 Term Loan
Debt Covenant To Actual Ratios [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving credit facility, maximum borrowing capacity |  | $ 325,000,000 |  | $ 325,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 200,000,000 | $ 200,000,000 | $ 125,000,000 |  | $ 150,000,000 | $ 125,000,000
Term loan facility | 125,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving credit facility present accordion provisions |  | 50,000,000 |  | 50,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility maturity date (Date) |  |  |  | Mar. 31, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount drawn under term loan facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 42,300,000 |  |  |  |  | 122,700,000
Description of variable interest rate |  |  |  |  |  |  |  |  |  |  |  |  | prime rate | LIBOR |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  |  |  |  |  |  |  |  |  |  | 1.50% | 2.50% |  |  |  |  |  |  |  |  |  |
Weighted average interest rate |  |  |  |  |  | 2.80% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.90% |  |
(Decrease) in variable interest rate of debt instrument |  | 0.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets and operations independent of subsidiaries |  | 0 |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ratio of indebtedness to net capital (in Ratio) |  |  |  |  |  |  |  | 3.50 | 3.5 |  |  |  |  |  | 3.75 | 3.75 |  | 2.83 |  |  |  |  |  |
Gains Losses On Extinguishment Of Debt And Other Costs |  | $ 0 | $ 0 | $ 1,042,000 | $ 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ratio of earnings to fixed cost obligations (in Ratio) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.2 | 2.60 |  |  |  |  |  |
Deferred purchase price notes payable to sellers of acquired entities, discounted imputed interest rate (in Percent) |  |  |  |  |  |  |  |  |  |  | 7.00% | 11.00% |  |  |  |  |  |  |  |  |  |  |  |
Deferred purchase price note interest rate |  | 0.00% |  | 0.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Imputed interest rate |  |  |  |  |  |  |  |  |  |  | 9.50% | 11.00% |  |  |  |  |  |  |  |  |  |  |  |
Deferred purchase price notes payable to sellers of acquired entities, range of original maturities (in years) |  |  |  |  |  |  |  |  |  |  | 5 years | 20 years |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Periodic Principal Repayment, Percentage |  |  |  |  |  |  | 7.50% | 10.00% |  | 12.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Periodic Principal Payments, Term | 2 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

X
- Definition The amount drawn under term loan facility. + References No definition available. + Details
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- Definition Assets and Operations Independent of Subsidiaries + References No definition available. + Details
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- Details
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- Definition Debt Instrument, Imputed Interest Rate + References No definition available. + Details
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- Definition The deferred purchase price note interest rate. + References No definition available. + Details
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- Definition The discounted imputed interest rate of deferred purchase price notes to sellers of acquired entities. + References No definition available. + Details
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- Definition The range of original maturities of deferred purchase price notes payable to sellers of acquired entities. + References No definition available. + Details
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- Definition Gains Losses On Extinguishment Of Debt And Other Costs + References No definition available. + Details
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- Definition Additional borrowing capacity under the credit facility's accordion feature providing the right to increase the line of credit borrowing capacity. + References No definition available. + Details
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- Definition Earnings divided by total fixed cost obligations. + References No definition available. + Details
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- Definition The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR. + References No definition available. + Details
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- Definition Date the credit facility terminates, in CCYY-MM-DD format. + 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 Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the 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 Carrying amount of collateralized debt obligations with maturities initially due after one year or beyond the operating cycle, if longer, excluding the current portion. Obligations include, but not limited to, mortgage loans, chattel loans, and other borrowings secured by assets. + 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 210.5-02.22) -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 22 -Article 5 + Details
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