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Commitments, Contingencies And Guarantees (Narrative) (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Payment Required Upon Termination Of Employment [Line Items] |  |  |
Rent expense charged to operations | $ 22,700,000 | $ 20,500,000 | $ 17,200,000
Minimum royalty payments due through 2027 | 1,600,000 |  |
Contingent commitments, not accrued | 5,500,000 |  |
Business Combination, Contingent Consideration, Liability | 900,000 | 5,900,000 |
Total contingent liabilities | 6,400,000 |  |
Purchase Obligation | 14,300,000 |  |
Loss contingency, range of possible loss, maximum | 2,600,000 | 3,500,000 | 2,300,000
Liabilities for indemnification obligations | 0 | 0 |
Other Liabilities | 1,800,000 | 1,400,000 |
Outstanding letters of credit to insurance company as security for workers' compensation claims | $ 1,300,000 |  |
Period for continued vesting of outstanding equity awards upon termination of CEO without cause other than following a change in control, years | two years |  |
Payment Required To CEO Upon Termination Of Employment Without Cause Other Than Following Change In Control [Member] |  |  |
Payment Required Upon Termination Of Employment [Line Items] |  |  |
Employee agreement contingencies | $ 1,600,000 |  |
Payment Required To Officers Upon Termination Of Employment Following Change Of Control [Member] |  |  |
Payment Required Upon Termination Of Employment [Line Items] |  |  |
Employee agreement contingencies | 27,100,000 |  |
Workers Compensation Insurance Policies [Member] |  |  |
Payment Required Upon Termination Of Employment [Line Items] |  |  |
Retained claim liability per incident | 300,000 | 300,000 | 300,000
Employee Health Care Insurance Policy [Member] |  |  |
Payment Required Upon Termination Of Employment [Line Items] |  |  |
Retained claim liability per incident | 450,000 | 425,000 | 375,000
General insurance expense | 40,400,000 | 34,600,000 | $ 32,000,000
Self Insurance Reserve | $ 4,000,000 | $ 4,800,000 |

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- Definition For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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- Definition Amount of liability recognized arising from contingent consideration 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 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 35 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6911338&loc=d3e6819-128478 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476 + Details
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- Definition The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 + Details
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- Definition Reflects the estimated amount of loss from the specified contingency as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349 + Details
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- Definition The amount the entity has committed to make for future royalty guarantees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 928 -SubTopic 440 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6473578&loc=d3e63223-108013 + Details
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- Definition Liability for amount due employees, in addition to wages and any other money that employers owe employees, when their employment ends through a layoff or other termination. For example, a company may provide involuntarily terminated employees with a lump sum payment equal to one week's salary for every year of employment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Other Postemployment Benefits -URI http://asc.fasb.org/extlink&oid=6519534 + Details
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