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Consolidate Statements of Cash Flows - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Revenue Equipment [Member] |  |  |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Gain on disposition of revenue equipment | $ (5,584,000) | $ (4,387,000) | $ (5,972,000)
CASH FLOWS USED FOR INVESTING ACTIVITIES: |  |  |
Revenue equipment additions | (174,165,000) | (131,645,000) | (102,808,000)
Proceeds from revenue equipment dispositions | 56,011,000 | $ 43,933,000 | $ 48,048,000
Facility [Member] |  |  |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Gain on disposition of revenue equipment | (4,104,000) |  |
Buildings And Land Office Equipment And Other [Member] |  |  |
CASH FLOWS USED FOR INVESTING ACTIVITIES: |  |  |
Revenue equipment additions | (13,482,000) | $ (30,885,000) | $ (18,031,000)
Proceeds from revenue equipment dispositions | 6,594,000 | 28,000 | 28,000
Net income | 35,745,000 | 29,834,000 | 30,147,000
Depreciation | 75,323,000 | 68,243,000 | 64,476,000
Deferred income taxes | 14,720,000 | 9,422,000 | 4,303,000
Tax benefits from share-based payment arrangement exercises | 373,000 | 159,000 | 189,000
Excess tax benefits from share-based payment arrangement exercises | (432,000) | (115,000) | (165,000)
Allocated Share-based Compensation Expense | 1,404,000 | 921,000 | 1,084,000
Equity in loss (earnings) from affiliate | $ 296,000 | $ (246,000) | (111,000)
Income before income taxes attributable to noncontrolling interest |  |  | 84,000
Receivables | $ 7,968,000 | $ (14,913,000) | (6,478,000)
Prepaid expenses and other | (1,274,000) | (1,586,000) | (25,000)
Accounts payable | (4,853,000) | (723,000) | 2,387,000
Insurance and claims accruals | 2,237,000 | (406,000) | 566,000
Accrued liabilities | 6,419,000 | (4,232,000) | (1,298,000)
Net cash provided by operating activities | $ 128,238,000 | $ 81,971,000 | 89,187,000
Decrease in cash and cash equivalents resulting from change to equity method of accounting |  |  | (1,924,000)
Other | $ (39,000) | $ (37,000) | (35,000)
Net cash used for investing activities | (125,081,000) | (118,606,000) | (74,722,000)
CASH FLOWS (USED FOR) PROVIDED BY FINANCING ACTIVITIES: |  |  |
Borrowings under credit facility and long-term debt | 141,908,000 | 168,444,000 | 82,697,000
Repayment of borrowings under credit facility and long-term debt | (128,414,000) | $ (144,071,000) | $ (85,423,000)
Repurchase and retirement of common stock | (16,175,000) |  |
Dividends on common stock | (3,342,000) | $ (3,339,000) | $ (2,769,000)
Issuance of common stock from share-based payment arrangement exercises | 3,490,000 | 1,214,000 | $ 1,126,000
Change in checks issued in excess of cash balances | (745,000) | 745,000 |
Excess tax benefits from share-based payment arrangement exercises | $ 432,000 | $ 115,000 | $ 165,000
Noncontrolling interest distributions |  |  | (84,000)
Net cash (used for) provided by financing activities | $ (2,846,000) | $ 23,108,000 | (4,288,000)
NET CHANGE IN CASH AND CASH EQUIVALENTS | 311,000 | (13,527,000) | 10,177,000
CASH AND CASH EQUIVALENTS: |  |  |
Beginning of year | 123,000 | 13,650,000 | 3,473,000
End of year | 434,000 | 123,000 | 13,650,000
SUPPLEMENTAL NON-CASH DISCLOSURE: |  |  |
Change in property and equipment not yet paid | 2,853,000 | (3,973,000) | 6,644,000
Income taxes | 2,121,000 | 26,766,000 | 16,190,000
Interest | $ 252,000 | $ 179,000 | $ 97,000

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- Definition Amount before tax of other comprehensive income (loss) attributable to noncontrolling interests. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=51664549&loc=SL4569616-111683 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=51664549&loc=SL4569643-111683 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684 + Details
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- Definition The net cash outflow or inflow from other investing activities. This element is used when there is not a more specific and appropriate element in the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3098-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3095-108585 + Details
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- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 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 + Details
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- Definition Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 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 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3213-108585 + Details
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- Definition Amount of cash outflow to a noncontrolling interest. Includes, but not limited to, reduction of noncontrolling interest ownership. Excludes dividends paid to the noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 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 + Details
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- Definition The total cash inflow associated with the amount received from holders to acquire the entity's shares under incentive and share awards, including stock option exercises. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585 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 + Details
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- Definition The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer. + References Reference 1: 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=56944662&loc=d3e3255-108585 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 + Details
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- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3179-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 + Details
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