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Long-Term Debt Long-Term Debt (Narrative) (Details) $ in Thousands |  | 12 Months Ended
--- | --- | ---
May. 20, 2015 USD ($) | Dec. 31, 2015 USD ($)
Debt Instrument [Line Items] |  |
Line of credit facility, current borrowing capacity |  | $ 325,000
Principal amount |  | $ 208,466
Ratio of indebtedness to net capital (in ratio) |  | 2.97
Debt compliance, required minimum fixed charge ratio |  | 1.20
Ratio of earnings to fixed cost obligations (in ratio) |  | 2.79
Before June 29, 2014 |  |
Debt Instrument [Line Items] |  |
Debt compliance, required maximum leverage ratio |  | 3.25
After June 29, 2013 |  |
Debt Instrument [Line Items] |  |
Debt compliance, required maximum leverage ratio |  | 3.50
Line of Credit | Prime Rate Option |  |
Debt Instrument [Line Items] |  |
Debt instrument interest rate (in percent) |  | 1.50%
Line of Credit | LIBOR Margin Option |  |
Debt Instrument [Line Items] |  |
Debt instrument interest rate (in percent) |  | 2.50%
Deferred Purchase Price Notes |  |
Debt Instrument [Line Items] |  |
Debt instrument interest rate (in percent) |  | 0.00%
Deferred Purchase Price Notes | Minimum |  |
Debt Instrument [Line Items] |  |
Debt instrument interest rate (in percent) |  | 7.00%
Deferred purchase price notes payable to sellers of acquired entities, discounted imputed interest rate (in Percent) |  | 8.50%
Debt instrument, term |  | 5 years
Deferred Purchase Price Notes | Maximum |  |
Debt Instrument [Line Items] |  |
Debt instrument interest rate (in percent) |  | 11.00%
Deferred purchase price notes payable to sellers of acquired entities, discounted imputed interest rate (in Percent) |  | 10.00%
Debt instrument, term |  | 20 years
Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Line of credit facility, current borrowing capacity |  | $ 200,000
Line of credit facility, potential increase to borrowing capacity |  | 50,000
Revolving Credit Facility | Line of Credit |  |
Debt Instrument [Line Items] |  |
Minimum unrestricted cash and undrawn borrowing capacity | $ 15,000 |
Maximum senior secured leverage ratio | 3.25 |
Credit Facility, Term Note |  |
Debt Instrument [Line Items] |  |
Line of credit facility, current borrowing capacity |  | $ 125,000
Line of credit facility, weighted average interest rate |  | 2.60%

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- Definition Line of Credit Facility, Potential Increase to Borrowing Capacity + References No definition available. + Details
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- Definition Line of Credit Facility, Maximum Leverage Ratio Allowed to Repurchase Common Stock + References No definition available. + Details
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- Definition Line of Credit Facility, Minimum Unrestricted Cash and Undrawn Borrowing Capacity Required to Repurchase Common Stock + 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 Contractual interest rate for funds borrowed, under the debt agreement. + 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(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + 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 + Details
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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: 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 2: 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 3: 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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 + Details
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