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Significant Accounting Policies (Narrative) (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Significant Accounting Policies [Line Items] |  |  |
DeferredTaxAssetsReclassification | $ 29,400,000 |  |
Noncash or Part Noncash Acquisition, Fixed Assets Acquired | 3,552,000 | $ 0 | $ 0
Stock Repurchase Program, Authorized Amount | 200,000,000 |  |
Debt and Capital Lease Obligations | 133,805,000 | 155,714,000 |
Depreciation expenses including capital leases | 164,800,000 | 145,800,000 | 126,400,000
Self-insurance reserve | 119,200,000 | 107,700,000 |
Long-term portions of self insurance reserve | 74,300,000 | 65,400,000 |
Advertising expense | 22,900,000 | 19,300,000 | $ 16,700,000
Long-term Debt, Fair Value | $ 139,100,000 | $ 165,500,000 |
Total Stock Repurchased And Retired Shares | 1,753,039 |  |
Total Stock Repurchased And Retired Value | $ 119,600,000 |  |
Stock Repurchase Program, Remaining Authorized Repurchase Amount | 80,400,000 |  |
Group Health Claims [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Insurance maximum, per occurrence | 500,000 |  |
Self insurance additional coverage | 400,000 |  |
Workers Compensation Claims [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Insurance maximum, per occurrence | 1,000,000 |  |
Cargo Loss And Damage Claims [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Insurance maximum, per occurrence | 100,000 |  |
Bodily Injury And Property Damage [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Insurance maximum, per occurrence | $ 2,750,000 |  |

X
- Definition Amount of deferred tax assets reclassified to non-current on the balance sheet for the adoption of ASU 2015-17. + References No definition available. + Details
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- Definition Insurance Maximum, Per Occurrence + References No definition available. + Details
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- Definition Additional self insurance coverage in excess of the retention level. + References No definition available. + Details
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- Definition Significant Accounting Policies [Line Items] + References No definition available. + Details
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- Definition The total number of shares that have been repurchased and retired under the program as of the financial statement date. + References No definition available. + Details
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- Definition The total value of stock that has been repurchased and retired under the program. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital). + References No definition available. + Details
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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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- Definition Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and 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 210.9-03.13,16) -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 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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- Definition The amount of fixed assets that an Entity acquires in a noncash (or part noncash) acquisition. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 + Details
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- Definition Carrying amount (including both current and noncurrent portions) of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property. + 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 210.5-02.24) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Carrying amount of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property that are expected to be paid after one year (or the normal operating cycle, if longer). + References No definition available. + Details
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