Knight-Swift Transportation (KNX) 10-Q 3 May 16 2016 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2016	Apr. 26, 2016
Entity Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q1
Trading Symbol	SWFT
Entity Registrant Name	SWIFT TRANSPORTATION Co
Entity Central Index Key	1,492,691
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Class A Common Stock [Member]
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		84,103,251
Class B Common Stock [Member]
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		50,991,938

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands		Mar. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents		$ 142,724	$ 107,590
Restricted cash		57,356	55,241
Restricted investments, held to maturity, amortized cost		23,171	23,215
Accounts receivable, net		408,769	422,421
Equipment Sales Receivables		6,710	0
Income tax refund receivable		3,553	11,664
Inventories and supplies		18,478	18,426
Assets held for sale		9,692	9,084
Prepaid taxes, licenses, insurance and other		48,034	48,149
Current portion of notes receivable		9,425	9,817
Total current assets		727,912	705,607
Property and equipment, at cost:
Revenue and service equipment		2,229,163	2,278,618
Land		131,693	131,693
Facilities and improvements		271,408	269,769
Furniture and office equipment		103,424	99,519
Total property and equipment		2,735,688	2,779,599
Less: accumulated depreciation and amortization		1,152,843	1,128,499
Net property and equipment		1,582,845	1,651,100
Other assets		24,573	26,585
Intangible assets, net		278,915	283,119
Goodwill		253,256	253,256
Total assets		2,867,501	2,919,667
Current liabilities:
Accounts payable		118,605	121,827
Accrued liabilities		111,458	97,313
Current portion of claims accruals		75,850	84,429
Current portion of long-term debt		15,543	35,514
Current portion of capital lease obligations		53,294	59,794
Total current liabilities		374,750	398,877
Revolving line of credit	[1]	200,000	200,000
Long-term debt, less current portion		631,620	643,663
Capital lease obligations, less current portion		210,612	222,001
Claims accruals, less current portion		158,889	149,281
Deferred income taxes		459,437	463,832
Accounts receivable securitization		224,017	223,927
Other liabilities		1,239	959
Total liabilities		$ 2,260,564	$ 2,302,540
Commitments and Contingencies (Notes 8 and 9)
Stockholders’ equity:
Preferred stock, par value $0.01 per share; Authorized 10,000,000 shares; none issued		$ 0	$ 0
Additional paid-in capital		725,049	754,589
Accumulated deficit		119,654	139,033
Accumulated other comprehensive income		81	81
Noncontrolling interest		102	102
Total stockholders’ equity		606,937	617,127
Total liabilities and stockholders’ equity		2,867,501	2,919,667
Class A Common Stock [Member]
Stockholders’ equity:
Common stock		849	878
Class B Common Stock [Member]
Stockholders’ equity:
Common stock		$ 510	$ 510
[1]	(1)The Company had outstanding letters of credit, primarily related to workers' compensation and self-insurance liabilities of $101.0 million and $95.0 million under the New Revolver at March 31, 2016 and December 31, 2015, respectively.

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2016	Dec. 31, 2015
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Class A Common Stock [Member]
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	84,911,982	87,808,801
Common stock, shares outstanding	84,911,982	87,808,801
Class B Common Stock [Member]
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	250,000,000	250,000,000
Common stock, shares issued	50,991,938	50,991,938
Common stock, shares outstanding	50,991,938	50,991,938

Consolidated Income Statements

Consolidated Income Statements - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating revenue:
Revenue, excluding fuel surcharge revenue	$ 906,913	$ 894,864
Fuel surcharge revenue	60,910	120,280
Operating revenue	967,823	1,015,144
Operating expenses:
Salaries, wages and employee benefits	288,633	261,654
Operating supplies and expenses	90,215	94,204
Fuel	74,987	106,907
Purchased transportation	267,309	288,811
Rental Expense	56,252	61,975
Insurance and claims	47,710	44,307
Depreciation and amortization of property and equipment	66,951	56,927
Amortization of intangibles	4,204	4,204
Gain on disposal of property and equipment	(6,326)	(3,932)
Communication and utilities	6,900	7,499
Operating taxes and licenses	18,505	17,588
Total operating expenses	915,340	940,144
Operating income	52,483	75,000
Other expenses (income):
Interest expense	8,594	10,388
Derivative interest expense	0	2,793
Interest income	(751)	(587)
Non-cash impairments of non-operating assets	0	1,480
Other income, net	(776)	(605)
Total other expenses (income), net	7,067	13,469
Income before income taxes	45,416	61,531
Income tax expense	13,511	23,691
Net income	$ 31,905	$ 37,840
Basic earnings per share	$ 0.23	$ 0.27
Diluted earnings per share	$ 0.23	$ 0.26
Shares used in per share calculations
Basic	136,519	142,199
Diluted	137,655	143,955

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement Of Comprehensive Income [Abstract]
Net income	$ 31,905	$ 37,840
Accumulated losses on derivatives reclassified to derivative interest expense	0	1,848
Other comprehensive income before income taxes	0	1,848
Income tax effect of items within other comprehensive income	0	711
Other comprehensive income, net of income taxes	0	1,137
Total comprehensive income	$ 31,905	$ 38,977

Consolidated Statement Of Stock

Consolidated Statement Of Stockholders' Equity - 3 months ended Mar. 31, 2016 - USD ($) $ in Thousands	Total	Common Stock [Member]Class A Common Stock [Member]	Common Stock [Member]Class B Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Noncontrolling Interest [Member]
Beginning balance, shares at Dec. 31, 2015		87,808,801	50,991,938
Beginning balance at Dec. 31, 2015	$ 617,127	$ 878	$ 510	$ 754,589	$ (139,033)	$ 81	$ 102
Common stock issued under stock plans, shares		202,005
Common stock issued under stock plans, value	1,087	$ 2		1,085
Stock-based compensation expense	1,417			1,417
Excess tax benefits from stock-based compensation	77			77
Shares issued under employee stock purchase plan, shares		24,716
Shares issued under employee stock purchase plan, value	$ 324	$ 0		324
Repurchase and cancellation of Class A Common Stock, shares	(3,124,000)	(3,123,540)
Repurchase and cancellation of Class A Common Stock, value	$ 45,000	$ 31		32,443	12,526
Net income	31,905				31,905
Other comprehensive income, net of income taxes	0					0
Ending balance, shares at Mar. 31, 2016		84,911,982	50,991,938
Ending balance at Mar. 31, 2016	$ 606,937	$ 849	$ 510	$ 725,049	$ (119,654)	$ 81	$ 102

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net income	$ 31,905	$ 37,840
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of property, equipment and intangibles	71,155	61,131
Amortization of debt issuance costs, original issue discount, and losses on terminated swaps	351	2,606
Gain on disposal of property and equipment less write-off of totaled tractors	(5,763)	(3,698)
Impairments	0	1,480
Deferred income taxes	(4,473)	(6,346)
Provision for losses on accounts receivable	(1,233)	1,913
Stock-based compensation expense	1,417	1,483
Excess tax benefits from stock-based compensation	77	1,172
Income effect of mark-to-market adjustment of interest rate swaps	0	(119)
Increase (decrease) in cash resulting from changes in:
Accounts receivable	14,885	24,329
Inventories and supplies	(52)	918
Prepaid expenses and other current assets	8,226	16,789
Other assets	2,332	1,450
Accounts payable, accrued and other liabilities	13,058	(10,447)
Net cash provided by operating activities	131,731	128,157
Cash flows from investing activities:
Increase in restricted cash	(2,115)	(16,071)
Proceeds from maturities of investments	6,386	14,190
Purchases of investments	6,429	8,016
Proceeds from sale of property and equipment	34,271	13,370
Capital expenditures	34,450	62,006
Payments received on notes receivable	1,127	2,065
Expenditures on assets held for sale	6,960	2,313
Payments received on assets held for sale	5,620	1,815
Payments received on equipment sale receivables	0	352
Net cash used in investing activities	2,550	56,614
Cash flows from financing activities:
Repayment of long-term debt and capital leases	50,535	19,294
Proceeds from long-term debt	0	4,504
Net repayments on revolving line of credit	0	(57,000)
Borrowings under accounts receivable securitization	0	10,000
Repayment of accounts receivable securitization	0	50,000
Proceeds from common stock issued	1,411	2,679
Repurchase of Class A common stock	45,000	0
Excess tax benefits from stock-based compensation	77	1,172
Net cash used in financing activities	94,047	107,939
Net increase (decrease) in cash and cash equivalents	35,134	(36,396)
Cash and cash equivalents at beginning of period	107,590	105,132
Cash and cash equivalents at end of period	142,724	68,736
Cash paid during the period for:
Interest	8,081	13,912
Income taxes	944	1,507
Non-cash investing activities:
Equipment purchase accrual	593	59,814
Notes receivable from sale of assets	520	1,298
Equipment sales receivables	6,710	753
Non-cash financing activities:
Capital lease additions	$ 0	$ 9,988

Introduction and Basis Of Prese

Introduction and Basis Of Presentation	3 Months Ended
	Mar. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Introduction and Basis Of Presentation	Introduction and Basis of Presentation Certain acronyms and terms used throughout this Quarterly Report on Form 10-Q are specific to our company, commonly used in our industry, or are otherwise frequently used throughout our document. Definitions for these acronyms and terms are provided in the "Glossary of Terms," available in the front of this document. Description of Business Swift is a transportation solutions provider, headquartered in Phoenix, Arizona. As of March 31, 2016 , the Company's fleet of revenue equipment included 19,858 tractors (comprised of 14,986 company tractors and 4,872 owner-operator tractors), 63,891 trailers and 9,150 intermodal containers. The Company’s four reportable segments are Truckload, Dedicated, Swift Refrigerated and Intermodal. Seasonality In the truckload industry, results of operations generally show a seasonal pattern. As customers ramp up for the year-end holiday season, the late third quarter and the fourth quarter have historically been the Company's strongest volume periods. As customers reduce shipments after the winter holiday season, the first quarter has historically been a lower volume quarter than the other three quarters. In recent years, the macro consumer buying patterns combined with shippers’ supply chain management, which historically contributed to the fourth quarter "peak" season, continued to evolve. As a result, the Company's fourth quarter 2015, 2014 and 2013 volumes were more evenly disbursed throughout the quarter rather than peaking early in the quarter. In the eastern and mid-western United States, and to a lesser extent in the western United States, the Company's equipment utilization typically declines and operating expenses generally increase during the winter season, as fuel efficiency declines from engine idling and severe weather tends to increase accident frequency, claims, and equipment repairs. The Company's revenue is directly related to shippers' available working days. As such, curtailed operations and vacation shutdowns around the holidays may affect the Company's revenue. From time to time, the Company also suffers short-term impacts from severe weather and similar events, such as tornadoes, hurricanes, blizzards, ice storms, floods, fires, earthquakes, and explosions that could add volatility to, or harm, the Company's results of operations. Basis of Presentation The consolidated financial statements and footnotes included in this Quarterly Report on Form 10-Q should be read in conjunction with the consolidated financial statements and footnotes included in the Company's Annual Report on Form 10-K for the year ended December 31, 2015 . The consolidated financial statements include the accounts of Swift Transportation Company and its wholly-owned subsidiaries. In management's opinion, these consolidated financial statements were prepared in accordance with GAAP and include all adjustments necessary for the fair presentation of the periods presented. Change in Presentation In April 2015, FASB issued ASU 2015-03, Simplifying the Presentation of Debt Issuance Costs , which amended ASC Subtopic 835-30, Interest – Imputation of Interest. The amendments in this ASU simplify the presentation of debt issuance costs and align the presentation with debt discounts. Entities are required to present debt issuance costs within liabilities as a direct deduction from the face amount of the related debt, rather than as a deferred charge within assets. In August 2015, FASB issued ASU 2015-15, Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements – Amendments to SEC Paragraphs Pursuant to Staff Announcement at June 18, 2015 EITF Meeting (SEC Update) , which also amended ASC Subtopic 835-30, Interest – Imputation of Interest . The SEC determined that ASU 2015-03 (discussed above) did not address costs related to line-of-credit arrangements. The amendments in ASU 2015-15 clarify that entities may defer and present debt issuance costs as an asset, and subsequently amortize the deferred debt issuance costs ratably over the term of the line-of-credit arrangement, regardless of whether there are any outstanding borrowings on the line-of-credit arrangement. The amendments in these ASUs require retrospective application, with related disclosures for a change in accounting principle. For public business entities, the amendments in these ASUs are effective for financial statements issued for fiscal years beginning after December 15, 2015, and the interim periods within those fiscal years, with early adoption permitted. NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED) — CONTINUED The Company adopted this guidance during the three months ended March 31, 2016. Accordingly, debt issuance costs, except for those associated with the Company’s New Revolver, are presented as direct deductions from the face amount of the related debt. The Company retrospectively adjusted the December 31, 2015 consolidated balance sheet to align with the current period presentation, as follows: December 31, 2015 Financial Statement Caption Unadjusted Consolidated Balance Sheet Reclassification Adjustments Adjusted Consolidated Balance Sheet ASSETS: Other assets $ 29,353 $ (2,768 ) $ 26,585 LIABILITIES: Current portion of long-term debt $ 35,582 $ (68 ) $ 35,514 Long-term debt, less current portion 645,290 (1,627 ) 643,663 Accounts receivable securitization 225,000 (1,073 ) 223,927

Recently Issued Accounting Pron

Recently Issued Accounting Pronouncements	3 Months Ended
	Mar. 31, 2016
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements The following table presents accounting pronouncements recently issued by FASB, but not yet adopted by the Company. Date Issued Reference Description Expected Adoption Date and Method Financial Statement Impact April 2016 2016-10: Revenue from Contracts with Customers (Topic 606) – Identifying Performance Obligations and Licensing The amendments in this ASU clarify the following two aspects of Topic 606: identifying performance obligations and the licensing implementation guidance, while retaining the related principles for those areas. The amendments do not change the core principle of the guidance. January 2018, Modified retrospective Currently under evaluation; not yet quantifiable. March 2016 2016-08: Revenue from Contracts with Customers (Topic 606) – Principal versus Agent Considerations (Reporting Revenue Gross versus Net) The amendments in this ASU are intended to improve the operability and understandability of the implementation guidance on principal versus agent considerations, but do not change the core principle of the guidance. January 2018, Modified retrospective Currently under evaluation; not yet quantifiable. March 2016 2016-09: Compensation – Stock Compensation (Topic 718) – Improvements to Employee Share-based Payment Accounting The amendments in this ASU are intended to simplify various aspects of accounting for stock-based compensation, including income tax consequences, classification of awards as equity or liability, as well as classification of activities within the statement of cash flows. January 2017, Adoption method varies by amendment Currently under evaluation; not yet quantifiable. February 2016 2016-02: Leases (Topic 842) The new standard requires lessees to recognize assets and liabilities arising from both operating and financing leases on the balance sheet. Lessor accounting for leases is largely unaffected by the new guidance. January 2019, Modified retrospective Currently under evaluation; not yet quantifiable. January 2016 2016-01: Financial Instruments – Overall (Subtopic 825-10) – Recognition and Measurement of Financial Assets and Financial Liabilities The amendments in this ASU address various aspects of recognition, measurement, presentation, and disclosure of financial instruments. They additionally establish ASC Topic 321 – Investments – Equity Securities, which applies to investments in equity securities and other ownership interests in an entity, including investments in partnerships, unincorporated joint ventures and limited liability companies. January 2018, Modified retrospective Not expected to be material.

Restricted Investments

Restricted Investments	3 Months Ended
	Mar. 31, 2016
Schedule of Investments [Abstract]
Restricted Investments	Restricted Investments The following table presents the cost or amortized cost, gross unrealized gains and temporary losses, and estimated fair value of the Company’s restricted investments (in thousands): March 31, 2016 Gross Unrealized Cost or Amortized Gains Temporary Estimated Fair Value United States corporate securities $ 16,867 $ 8 $ (3 ) $ 16,872 Municipal bonds 4,879 — (1 ) 4,878 Negotiable certificate of deposits 1,425 — — 1,425 Restricted investments, held to maturity $ 23,171 $ 8 $ (4 ) $ 23,175 December 31, 2015 Gross Unrealized Cost or Amortized Gains Temporary Estimated Fair Value United States corporate securities $ 16,686 $ 2 $ (27 ) $ 16,661 Municipal Bonds 4,904 1 (1 ) 4,904 Negotiable certificate of deposits 1,625 — — 1,625 Restricted investments, held to maturity $ 23,215 $ 3 $ (28 ) $ 23,190 Refer to Note 14 for additional information regarding fair value measurements of restricted investments. As of March 31, 2016 , the contractual maturities of the restricted investments were one year or less. There were 33 securities and 36 securities that were in an unrealized loss position for less than twelve months as of March 31, 2016 and December 31, 2015 , respectively. The Company did not recognize any impairment losses for the three months ended March 31, 2016 or 2015 .

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	3 Months Ended
	Mar. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets There were no goodwill impairments recorded during the three months ended March 31, 2016 or 2015 . Intangible asset balances were as follows (in thousands): March 31, December 31, Customer Relationships: Gross carrying value $ 275,324 $ 275,324 Accumulated amortization (177,446 ) (173,242 ) Customer relationships, net 97,878 102,082 Trade Name: Gross carrying value 181,037 181,037 Intangible assets, net $ 278,915 $ 283,119 The following table presents amortization of intangible assets related to the 2007 Transactions and intangible assets existing prior to the 2007 Transactions (in thousands): Three Months Ended March 31, 2016 2015 Amortization of intangible assets related to the 2007 Transactions $ 3,912 $ 3,912 Amortization related to intangible assets existing prior to the 2007 Transactions 292 292 Amortization of intangibles $ 4,204 $ 4,204

Accounts Receivable Securitizat

Accounts Receivable Securitization	3 Months Ended
	Mar. 31, 2016
Transfers and Servicing [Abstract]
Accounts Receivable Securitization	Accounts Receivable Securitization On December 10, 2015, SRCII, a wholly-owned subsidiary of the Company, entered into the 2015 RSA, which further amends the 2013 RSA. The parties to the 2015 RSA include SRCII as the seller, Swift Transportation Services, LLC as the servicer, the various conduit purchasers, the various related committed purchasers, the various purchaser agents, the various letters of credit participants, and PNC Bank, National Association as the issuing bank of letters of credit and as administrator. Pursuant to the 2015 RSA, the Company's receivable originator subsidiaries sell, on a revolving basis, undivided interests in all of their eligible accounts receivable to SRCII. In turn, SRCII sells a variable percentage ownership interest in the eligible accounts receivable to the various purchasers. The facility qualifies for treatment as a secured borrowing under ASC Topic 860, Transfers and Servicing. As such, outstanding amounts are classified as liabilities on the Company’s consolidated balance sheets. As of March 31, 2016 and December 31, 2015 , interest accrued on the aggregate principal balance at a rate of 1.0% . Program fees and unused commitment fees are recorded in interest expense in the Company's consolidated income statements. The Company incurred program fees of $0.9 million related to the 2015 RSA during the three months ended March 31, 2016 , and $1.0 million related to the 2013 RSA, during the three months ended March 31, 2015 . The 2015 RSA is subject to customary fees and contains various customary affirmative and negative covenants, representations and warranties, and default and termination provisions. Collections on the underlying receivables by the Company are held for the benefit of SRCII and the Purchasers in the facility and are unavailable to satisfy claims of the Company and its subsidiaries.

Debt And Financing

Debt And Financing	3 Months Ended
	Mar. 31, 2016
Debt Disclosure [Abstract]
Debt And Financing	Debt and Financing Other than the Company’s accounts receivable securitization, as discussed in Note 5, and its outstanding capital lease obligations as discussed in Note 7, the Company's long-term debt consisted of the following (in thousands): March 31, December 31, 2015 Agreement: New Term Loan A, due July 2020, net of $1,063 and $1,695 DLC as of March 31, 2016 and December 31, 2015, respectively $ 638,687 $ 668,055 Other 8,476 11,122 Long-term debt 647,163 679,177 Less: current portion of long-term debt, net of $3 and $68 DLC as of March 31, 2016 and December 31, 2015, respectively (15,543 ) (35,514 ) Long-term debt, less current portion $ 631,620 $ 643,663 March 31, December 31, Long-term debt $ 647,163 $ 679,177 Revolving line of credit (1) 200,000 200,000 Long-term debt, including revolving line of credit $ 847,163 $ 879,177 ____________ (1) The Company had outstanding letters of credit, primarily related to workers' compensation and self-insurance liabilities of $101.0 million and $95.0 million under the New Revolver at March 31, 2016 and December 31, 2015 , respectively. Credit Agreement On July 27, 2015, the Company entered into the 2015 Agreement, which replaced the 2014 Agreement, including the $450.0 million Old Revolver ( zero outstanding at closing), $500.0 million Old Term Loan A ( $485.0 million outstanding at closing), and $400.0 million Term Loan B ( $395.0 million outstanding at closing). The 2015 Agreement includes a New Revolver and a New Term Loan A. Upon closing, the $680.0 million in proceeds from the New Term Loan A, a $200.0 million draw on the New Revolver and $4.9 million cash on hand were used to pay off the then-outstanding balances of the Old Term Loan A and Term Loan B, including accrued interest and fees under the 2014 Agreement, as well as certain transactional fees associated with the 2015 Agreement. The following table presents the key terms of the 2015 Agreement (dollars in thousands): Description New Term Loan A New Revolver (2) Maximum borrowing capacity $680,000 $600,000 Final maturity date July 27, 2020 July 27, 2020 Interest rate base LIBOR LIBOR LIBOR floor —% —% Interest rate minimum margin (1) 1.50% 1.50% Interest rate maximum margin (1) 2.25% 2.25% Minimum principal payment — amount (3) $6,625 $— Minimum principal payment — frequency Quarterly Once Minimum principal payment — commencement date (3) December 31, July 27, ____________ (1) The interest rate margin for the New Term Loan A and New Revolver is based on the Company's consolidated leverage ratio. As of March 31, 2016 , interest accrued at 1.93% on the New Term Loan A and 1.94% on the New Revolver. As of December 31, 2015, interest accrued at 2.12% on the New Term Loan A and 2.08% on the New Revolver. (2) The commitment fee for the unused portion of the New Revolver is based on the Company's consolidated leverage ratio, and ranges from 0.25% to 0.35% . As of March 31, 2016 , commitment fees on the unused portion of the New Revolver accrued at 0.25% and outstanding letter of credit fees accrued at 1.50% . As of December 31, 2015, commitment fees on the unused portion of the New Revolver accrued at 0.25% and outstanding letter of credit fees accrued at 1.75% . (3) Commencing in March 2017, the minimum quarterly payment amount on the New Term Loan A is $12.3 million , at which it remains until final maturity. The New Revolver and New Term Loan A of the 2015 Agreement contain certain financial covenants with respect to a maximum leverage ratio and a minimum consolidated interest coverage ratio. The 2015 Agreement provides flexibility regarding the use of proceeds from asset sales, payment of dividends, stock buybacks, and equipment financing. In addition to the financial covenants, the 2015 Agreement includes customary events of default, including a change in control default and certain affirmative and negative covenants, including, but not limited to, restrictions, subject to certain exceptions, on incremental indebtedness, asset sales, certain restricted payments (including dividends and stock repurchases), certain incremental investments or advances, transactions with affiliates, engaging in additional business activities, and prepayments of certain other indebtedness. Borrowings under the 2015 Agreement are secured by substantially all of the assets of the Company and are guaranteed by Swift Transportation Company, IEL, Swift Refrigerated and its subsidiaries, Swift Transportation Co., LLC and its domestic subsidiaries other than its captive insurance subsidiaries, driver academy subsidiary, and its bankruptcy-remote special purpose subsidiary. Deferred Loan Costs DLCs related to the New Revolver, reported in "Other assets" in the Company's consolidated balance sheets, were $1.9 million and $1.5 million as of March 31, 2016 and December 31, 2015 , respectively. As discussed in Note 1, DLCs related to the Company's Term Loan A and accounts receivable securitization are now netted against the face amount of the debt, pursuant to the amendments in ASU 2015-03.

Leases

Leases	3 Months Ended
	Mar. 31, 2016
Leases [Abstract]
Leases	Leases The Company finances a portion of its revenue equipment under capital and operating leases and certain terminals under operating leases. Capital Leases (as Lessee)— The Company’s capital leases are typically structured with balloon payments at the end of the lease term equal to the residual value the Company is contracted to receive from certain equipment manufacturers upon sale or trade back to the manufacturers. If the Company does not receive proceeds of the contracted residual value from the manufacturer, the Company is still obligated to make the balloon payment at the end of the lease term. Certain leases contain renewal or fixed price purchase options. The present value of obligations under capital leases is included under "Current portion of capital lease obligations" and "Capital lease obligations, less current portion" in the consolidated balance sheets. As of March 31, 2016 , the leases were collateralized by revenue equipment with a cost of $328.2 million and accumulated amortization of $80.9 million . As of December 31, 2015 , the leases were collateralized by revenue equipment with a cost of $357.8 million and accumulated amortization of $90.1 million . Amortization of the equipment under capital leases is included in "Depreciation and amortization of property and equipment" in the Company’s consolidated income statements. Operating Leases (as Lessee)— Rent expense related to operating leases was $56.3 million for the three months ended March 31, 2016 and $62.0 million for the three months ended March 31, 2015 .

Purchase Commitments Purchase C

Purchase Commitments Purchase Commitments	3 Months Ended
	Mar. 31, 2016
Long-term Commitment (Excluding Unconditional Purchase Obligation) [Abstract]
Purchase Commitments	Purchase Commitments As of March 31, 2016 , the Company had commitments outstanding to acquire revenue equipment for the remainder of 2016 of approximately $550.5 million ( $395.4 million of which were tractor commitments), in 2017 for approximately $204.7 million ( $190.9 million of which were tractor commitments) and no purchase commitments for revenue equipment thereafter. The Company has the option to cancel tractor purchase orders with 60 to 90 days' notice prior to the scheduled production, although the notice period has lapsed for 30.1% of the tractor commitments outstanding as of March 31, 2016 . These purchases are expected to be financed by the combination of operating leases, capital leases, debt, proceeds from sales of existing equipment, and cash flows from operations. As of March 31, 2016 , the Company had outstanding purchase commitments of approximately $13.1 million for non-revenue equipment and no purchase commitments for facilities. Factors such as costs and opportunities for future terminal expansions may change the amount of such expenditures.

Contingencies and Legal Proceed

Contingencies and Legal Proceedings	3 Months Ended
	Mar. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Contingencies and Legal Proceedings	Contingencies and Legal Proceedings The Company is involved in certain claims and pending litigation primarily arising in the normal course of business. The majority of these claims relate to workers' compensation, auto collision and liability, and physical damage and cargo damage. The Company expenses legal fees as incurred and accrues for the uninsured portion of contingent losses from these and other pending claims when it is both probable that a liability has been incurred and the amount of the loss can be reasonably estimated. Based on the knowledge of the facts and, in certain cases, advice of outside counsel, management believes the resolution of claims and pending litigation, taking into account existing reserves, will not have a material adverse effect on the Company. Moreover, the results of complex legal proceedings are difficult to predict and the Company’s view of these matters may change in the future as the litigation and events related thereto unfold. For certain cases described below, management is unable to provide a meaningful estimate of the possible loss or range of loss because, among other reasons, (1) the proceedings are in various stages; (2) damages have not been sought; (3) damages are unsupported and/or exaggerated; (4) there is uncertainty as to the outcome of pending appeals; and/or (5) there are significant factual issues to be resolved. For these cases, however, management does not believe, based on currently available information, that the outcomes of these proceedings will have a material adverse effect on our financial condition, though the outcomes could be material to our operating results for any particular period, depending, in part, upon the operating results for such period. Arizona Owner-operator Class Action Litigation On January 30, 2004 , a class action lawsuit was filed by Leonel Garza on behalf of himself and all similarly-situated persons against Swift Transportation: Garza v. Swift Transportation Co., Inc ., Case No. CV7-472 (the "Garza Complaint"). The putative class originally involved certain owner-operators who contracted with the Company under a 2001 Contractor Agreement that was in place for one year. The putative class is alleging that the Company should have reimbursed owner-operators for actual miles driven rather than the contracted and industry standard remuneration based upon dispatched miles. The trial court denied plaintiff’s petition for class certification. The plaintiff appealed and on August 6, 2008, the Arizona Court of Appeals issued an unpublished Memorandum Decision reversing the trial court’s denial of class certification and remanding the case back to the trial court. On November 14, 2008, the Company filed a petition for review to the Arizona Supreme Court regarding the issue of class certification as a consequence of the denial of the Motion for Reconsideration by the Court of Appeals. On March 17, 2009, the Arizona Supreme Court granted the Company’s petition for review, and on July 31, 2009, the Arizona Supreme Court vacated the decision of the Court of Appeals, opining that the Court of Appeals lacked automatic appellate jurisdiction to reverse the trial court’s original denial of class certification and remanded the matter back to the trial court for further evaluation and determination. Thereafter, the plaintiff renewed the motion for class certification and expanded it to include all persons who were employed by Swift as employee drivers or who contracted with Swift as owner-operators on or after January 30, 1998, in each case who were compensated by reference to miles driven. On November 4, 2010, the Maricopa County trial court entered an order certifying a class of owner-operators and expanding the class to include employees. Upon certification, the Company filed a motion to compel arbitration, as well as filing numerous motions in the trial court urging dismissal on several other grounds including, but not limited to the lack of an employee as a class representative, and because the named owner-operator class representative only contracted with the Company for a three-month period under a one-year contract that no longer exists. In addition to these trial court motions, the Company also filed a petition for special action with the Arizona Court of Appeals, arguing that the trial court erred in certifying the class because the trial court relied upon the Court of Appeals ruling that was previously overturned by the Arizona Supreme Court. On April 7, 2011, the Arizona Court of Appeals declined jurisdiction to hear this petition for special action and the Company filed a petition for review to the Arizona Supreme Court. On August 31, 2011, the Arizona Supreme Court declined to review the decision of the Arizona Court of Appeals. In April 2012, the trial court issued the following rulings with respect to certain motions filed by Swift: (1) denied Swift’s motion to compel arbitration; (2) denied Swift’s request to decertify the class; (3) granted Swift’s motion that there is no breach of contract; and (4) granted Swift’s motion to limit class size based on statute of limitations. On November 13, 2014, the court denied plaintiff's motion to add new class representatives for the employee class and therefore the employee class remains without a plaintiff class representative. On March 18, 2015, the court denied Swift's two motions for summary judgment (1) to dismiss any claims related to the employee class since there is no class representative; and (2) to dismiss plaintiff's claim of breach of a duty of good faith and fair dealing. On July 14, 2015, the court granted Swift's motion to decertify the entire class. On December 23, 2015, Plaintiff filed a Petition for Special Action with the Arizona Court of Appeals. That petition has been fully briefed and argued, and a decision is pending. Ninth Circuit Owner-operator Misclassification Class Action Litigation On December 22, 2009 , a class action lawsuit was filed against Swift Transportation and IEL: Virginia VanDusen, John Doe 1 and Joseph Sheer , individually and on behalf of all other similarly-situated persons v. Swift Transportation Co., Inc., Interstate Equipment Leasing, Inc., Jerry Moyes, and Chad Killebrew , Case No. 9-CIV-10376 filed in the United States District Court for the Southern District of New York (the "Sheer Complaint"). The putative class involves owner-operators alleging that Swift Transportation misclassified owner-operators as independent contractors in violation of the federal Fair Labor Standards Act ("FLSA"), and various New York and California state laws and that such owner-operators should be considered employees. The lawsuit also raises certain related issues with respect to the lease agreements that certain owner-operators have entered into with IEL. At present, in addition to the named plaintiffs, approximately 450 other current or former owner-operators have joined this lawsuit. Upon Swift’s motion, the matter was transferred from the United States District Court for the Southern District of New York to the United States District Court in Arizona. On May 10, 2010, the plaintiffs filed a motion to conditionally certify an FLSA collective action and authorize notice to the potential class members. On September 23, 2010, plaintiffs filed a motion for a preliminary injunction seeking to enjoin Swift and IEL from collecting payments from plaintiffs who are in default under their lease agreements and related relief. On September 30, 2010, the district court granted Swift’s motion to compel arbitration and ordered that the class action be stayed, pending the outcome of arbitration. The district court further denied plaintiff’s motion for preliminary injunction and motion for conditional class certification. The district court also denied plaintiff’s request to arbitrate the matter as a class. The plaintiff filed a petition for a writ of mandamus to the Ninth Circuit Court of Appeals asking that the district court’s September 30, 2010 order be vacated. On July 27, 2011, the Ninth Circuit Court of Appeals denied the plaintiff’s petition for writ of mandamus and thereafter the district court denied plaintiff’s motion for reconsideration and certified its September 30, 2010 order. The plaintiffs filed an interlocutory appeal to the Ninth Circuit Court of Appeals to overturn the district court’s September 30, 2010 order to compel arbitration, alleging that the agreement to arbitrate is exempt from arbitration under Section 1 of the Federal Arbitration Act ("FAA") because the class of plaintiffs allegedly consists of employees exempt from arbitration agreements. On November 6, 2013, the Ninth Circuit Court of Appeals reversed and remanded, stating its prior published decision, "expressly held that a district court must determine whether an agreement for arbitration is exempt from arbitration under Section 1 of the FAA as a threshold matter." As a consequence of this determination by the Ninth Circuit Court of Appeals being different from a decision of the Eighth Circuit Court of Appeals on a similar issue, on February 4, 2014, the Company filed a petition for writ of certiorari to the United States Supreme Court to address whether the district court or arbitrator should determine whether the contract is an employment contract exempt from Section 1 of the Federal Arbitration Act. On June 16, 2014, the United States Supreme Court denied the Company’s petition for writ of certiorari. The matter remains pending in the district court and dispositive motion briefing will be completed in August 2016. The Company also filed a writ of mandamus and appeal from the district court's order that effectively denied the Company's motion to compel arbitration. The Ninth Circuit held oral argument on November 16, 2015 and the parties await a decision from the Court. The Company intends to vigorously defend against any proceedings. The final disposition of this case and the impact of such final disposition cannot be determined at this time. California Wage, Meal and Rest Driver Class Actions On March 22, 2010 , a class action lawsuit was filed by John Burnell , individually and on behalf of all other similarly-situated persons against Swift Transportation : John Burnell and all others similarly-situated v. Swift Transportation Co., Inc., filed in the Superior Court of California, County of San Bernardino (the "Burnell Complaint"). On September 3, 2010, upon motion by Swift, the matter was removed to the United States District Court for the Central District of California (the "California Court"), Case No. EDCV10-809-VAP. The putative class includes drivers who worked for Swift during the four years preceding the date of filing alleges that Swift failed to pay the California minimum wage, failed to provide proper meal and rest periods and failed to timely pay wages upon separation from employment. On April 9, 2013, the Company filed a motion for judgment on the pleadings, requesting dismissal of plaintiff's claims related to alleged meal and rest break violations under the California Labor Code alleging that such claims are preempted by the Federal Aviation Administration Authorization Act. On April 5, 2012 , the Company was served with an additional class action complaint, alleging facts similar to those as set forth in the Burnell Complaint: James R. Rudsell , on behalf of himself and all others similarly-situated v. Swift Transportation Co. of Arizona, LLC and Swift Transportation Company , in the Superior Court of California, County of San Bernardino (the "Rudsell Complaint"). On May 3, 2012, upon motion by Swift, the matter was removed to the California Court, Case No. EDCV12-00692-VAP. The Rudsell Complaint was stayed on April 29, 2013, pending a resolution of the Burnell Complaint. On September 25, 2014 , a class action lawsuit was filed by Lawrence Peck on behalf of himself and all other similarly-situated persons against Swift Transportation: Peck v. Swift Transportation Co. of Arizona, LLC in the Superior Court of California, County of Riverside (the "Peck Complaint"). The putative class, which includes current and former non-exempt employee truck drivers who performed services in California within the four-year statutory period, alleges that Swift failed to pay for all hours worked (specifically that pay-per-mile fails to compensate drivers for non-driving related services), failed to pay overtime, failed to properly reimburse work-related expenses, failed to timely pay wages and failed to provide accurate wage statements. On October 24, 2014, upon motion by Swift, the matter was removed to the California Court, Case No. 14-CV-02206-VAP. The Peck Complaint was stayed on April 6, 2015, pending a resolution of the earlier filed cases. On February 27, 2015 , Sadashiv Mares filed a complaint alleging five Causes of Action arising under California state law on behalf of himself and a putative class against Swift Transportation Co. of Arizona, LLC in the Superior Court of California, County of Alameda (the "Mares Complaint"). On July 13, 2015, upon motion by Swift, the matter was removed to the United States District Court for the Northern District of California, Case No. 2:15-CV-03253-JSW. Upon the Parties stipulation, on October 17, 2015, the case was transferred to the California Court, Case No. 2:15-CV-07920-VAP. The Mares Complaint was stayed on February 24, 2016, pending a resolution of the earlier filed cases. On or about April 15, 2015 , a complaint was filed in the Superior Court of California, County of San Bernardino: Rafael McKinsty et al. v. Swift Transportation Co. of Arizona, LLC, et al. , (the "McKinsty Complaint"). The McKinsty Complaint, a purported class action, alleges violation of California rest break laws and is similar to the Burnell, Rudsell, Peck and Mares Complaints. On July 2, 2015, upon motion by Swift, the matter was removed to the California Court, Case No. 15-CV-1317-VAP. The McKinsty Complaint was stayed on August 19, 2015, pending a resolution of the earlier filed cases. On October 15, 2015 , a class action lawsuit was filed in the Superior Court of California, County of Riverside: Thor Nilsen v. Swift Transportation Co. of Arizona, LLC (the "Nilsen Complaint"). The Nilsen Complaint alleges violations of California law similar to the Burnell, Rudsell, Peck, Mares, and McKinsty Complaints. On December 9, 2015, upon motion by Swift, the matter was removed to the California Court, Case No. 15-CV-02504-VAP. The Nilsen Complaint was stayed January 29, 2016, pending resolution of the earlier filed cases. The issue of class certification must first be resolved before the California Court will address the merits of these cases, and the Company retains all of its defenses against liability and damages, pending a determination of class certification. Class certification briefing is now complete and a class certification hearing was scheduled for April 25, 2016. The class certification hearing was held as scheduled and the parties now await a final ruling from the California Court. The final disposition of these cases as well as the impact of such final dispositions of these cases cannot be determined at this time. California Wage, Meal and Rest Maintenance & Service Employees Class Action On January 28, 2016 , a class action lawsuit was filed by Grant Fritsch , individually and on behalf of all other similarly-situated persons against Swift Transportation Services, LLC and Swift Transportation Company in the Superior Court of California, County of San Bernardino (the "Fritsch Complaint"). Mr. Fritsch worked for Swift as a yard hostler and he purports to represent a class of “all non-exempt maintenance and service employees” of Swift Transportation Services, LLC and/or Swift Transportation Company. The Fritsch Complaint alleges that Swift failed to pay overtime and doubletime wages required by California law, failed to provide proper meal and rest periods, failed to provide accurate itemized wage statements, and failed to timely pay wages upon separation from employment. The Complaint also includes a claim under the Private Attorneys General Act. The Company is evaluating its options and will be preparing a Responsive pleading shortly. The Company retains all of its defenses against liability and damages. The Company intends to vigorously defend against the merits of these claims and to challenge certification. The final disposition of this case and the impact of such final disposition of this case cannot be determined at this time. Arizona Fair Labor Standards Act Class Action Litigation On December 29, 2015 , a class action lawsuit was filed by Pamela Julian , individually and on behalf of all other similarly-situated persons against Swift Transportation, Inc., et al. in the United States District Court for the District of Delaware, Case No. 1:15-CV-01212-UNA (the "Julian Compliant"). The Julian Complaint alleges that Swift violated the FLSA by failing to pay its trainee drivers minimum wage for all work performed and by failing to pay overtime. On February 29, 2016, upon Stipulation of the Parties, the court transferred the case to the United States District Court for the District of Arizona, Case No. 2:16-CV-00576-ROS. On March 9, 2016, Swift filed a Motion to dismiss plaintiffs' overtime claims. That Motion is currently pending before the court. The Company retains all of its defenses against liability and damages. The Company intends to vigorously defend against the merits of these claims and to challenge certification. The final disposition of this case and the impact of such final disposition of this case cannot be determined at this time. Washington Overtime Class Actions On September 9, 2011 , a class action lawsuit was filed by Troy Slack and several other drivers on behalf of themselves, and all similarly-situated persons, against Swift Transportation: Troy Slack, et al . v. Swift Transportation Co. of Arizona, LLC and Swift Transportation Corporation in the State Court of Washington, Pierce County (the "Slack Complaint"). The Slack Complaint was removed to federal court on October 12, 2011, case number 11-2-114380. The putative class includes all current and former Washington state-based employee drivers during the three-year statutory period prior to the filing of the lawsuit, and through the present, and alleges that they were not paid minimum wage and overtime in accordance with Washington state law and that they suffered unlawful deductions from wages. On November 23, 2013, the court entered an order on plaintiffs' motion to certify the class. The court only certified the class as it pertains to "dedicated" drivers and did not certify any other class, including any class related to over-the-road drivers. On September 2, 2015, new counsel was appointed for Plaintiffs and on November 16, 2015, new legal counsel was substituted for the Company. As a result of the substitution of counsel for both parties, the court has extended all existing dates by ten months. On April 1, 2016, the Court entered an Order Approving the Plaintiffs' proposed class notice. The matter is now in discovery. The Company retains all of its defenses against liability and damages. The Company intends to vigorously defend against the merits of these claims and to challenge certification. The final disposition of this case and the impact of such final disposition of this case cannot be determined at this time. On January 14, 2016 , a class action lawsuit was filed by Julie Hedglin , individually and on behalf of all others similarly situated against Swift Transportation Co. of Arizona, LLC in the State Court of Washington, Pierce County (the “Hedglin Complaint”). The Hedglin Complaint was removed to federal court on February 18, 2016, 3:16-CV-05127-RJB. The putative class includes all current and former Washington heavy haul drivers and alleges the class was not paid for meal and rest periods, overtime, was not paid all wages due at established pay periods, and was not provided accurate wage statements. The matter is in its initial phases and is expected to move into discovery. The Company retains all of its defenses against liability and damages. The Company intends to vigorously defend against the merits of these claims and to challenge certification. The final disposition of this case and the impact of such final disposition of this case cannot be determined at this time. Indiana Fair Credit Reporting Act Class Action Litigation On March 18, 2015 , a class action lawsuit was filed by Melvin Banks , individually and on behalf of all other similarly-situated persons against Central Refrigerated Service, Inc. in the United States District Court for the Northern District of Indiana, Case No. 2:15-CV-00105. The complaint alleges that Central Refrigerated Service, Inc. violated the Fair Credit Reporting Act by failing to provide job applicants with adverse action notices and copies of their consumer reports and statements of rights. At this time, the size of the potential class is unknown. Initial discovery regarding the potential class has begun and the Company has sought to transfer the case from Indiana to Utah. The Company retains all of its defenses against liability and damages. The Company intends to vigorously defend against the merits of these claims and to challenge certification. The final disposition of this case and the impact of such final disposition of this case cannot be determined at this time. Utah Collective and Individual Arbitration On June 1, 2012 , Gabriel Cilluffo, Kevin Shire and Bryan Ratterree filed a putative class and collective action lawsuit against Central Refrigerated Service, Inc., Central Leasing, Inc., Jon Isaacson, and Jerry Moyes (collectively referred to herein as the "Central Parties"), Case No. ED CV 12-00886 in the United States District Court for the Central District of California. Through this action, the plaintiffs alleged that the Central Parties misclassified owner-operator drivers as independent contractors and were therefore liable to these drivers for minimum wages and other employee benefits under the FLSA. The complaint also alleged a federal forced labor claim under 18 U.S.C. § 1589 and 1595, as well as fraud and other state-law claims. Pursuant to the plaintiffs' owner-operator agreements, the district court issued an Order compelling arbitration and directed that the plaintiffs' causes of action under the FLSA should proceed to collective arbitration, while their forced labor, fraud and state law claims would proceed as separate individual arbitrations. A collective arbitration was subsequently initiated with the American Arbitration Association ("AAA"). Notice of the collective arbitration was sent to more than 3,000 owner-operators who worked for Central Refrigerated Service, Inc. and leased a vehicle from Central Leasing, Inc. on or after June 1, 2009. The parties are currently conducting discovery. No trial date has been set by the arbitrator. In addition to the collective arbitration that is pending before the AAA, the three named plaintiffs, along with approximately 400 other owner-operators, have initiated a series of individual, bilateral proceedings against the Central Parties with the AAA. Discovery is commencing in these individual cases, which are pending before approximately 30 separate arbitrators. Actual trial dates have not yet been set by the arbitrators, but the trials are expected to commence in the fourth quarter of 2016. Upon the acquisition of Central Refrigerated Service, Inc. by Swift Transportation Company, the plaintiffs in both the collective and individual actions were allowed to amend their complaints in June 2015 to include Swift Transportation Company as a defendant. The Company and the Central Parties intend to vigorously defend against the merits of plaintiffs' claims in both the collective and individual arbitration proceedings. The final disposition of this case and the impact cannot be determined at this time. California Class and Collective Action for Pre-employment Physical Testing On October 6, 2014 Robin Anderson filed a putative class and collective action against Central Refrigerated Service, Inc. Case No. 5:14-CV 02062 in the United States District Court for the Central District of California (the "Anderson Complaint"). In this action, plaintiff alleges that pre-employment tests of physical strength administered by a third party on behalf of Central Refrigerated Service, Inc. had an unlawfully discriminatory impact on female applicants and applicants over the age of 40. The suit seeks damages under Title VII of the Civil Rights Act of 1964, the Age Discrimination Act, and parallel California state law provisions, including the California Fair Employment and Housing Act. Upon the acquisition of Central Refrigerated Service, Inc. by Swift Transportation Company, Plaintiff was allowed to amend her complaint in October 2015 to include Swift Transportation Company and Workwell Systems, Inc. as additional defendants. Workwell Systems, Inc. is the company that provided the physical testing service used by Central Refrigerated Service, Inc. The litigation is still at a very preliminary stage and plaintiff has not yet effected service on the newly added defendants. Discovery has not yet commenced in the case and no trial date has been set. There is not currently any information available regarding the number of potential members of the putative class or collective actions. Central Refrigerated Service, Inc. and Swift intend to vigorously defend against the merits of plaintiff’s claims. The final disposition of this case and the impact cannot be determined at this time. Demand for Inspection of Books and Records In February 2016, the Company received several shareholder demands, requesting to inspect the Company’s books and records, pursuant to Section 220 of the Delaware General Corporation Law. The demands relate to the shareholders’ alleged investigation pertaining to whether the Board and Jerry Moyes have breached their fiduciary duties with respect to matters that have been publicly disclosed concerning the Company's securities trading policy, limitations on the pledging of Company stock on margin and share repurchases. The Company is in the process of responding to the shareholders’ requests. Any future disposition or resolution of these matters cannot be determined at this time. Environmental The Company's tractors and trailers are involved in motor vehicle accidents, experience damage, mechanical failures and cargo issues as an incidental part of its normal ordinary course of operations. From time to time, these matters result in the discharge of diesel fuel, motor oil or other hazardous materials into the environment. Depending on local regulations and who is determined to be at fault, the Company is sometimes responsible for the clean-up costs associated with these discharges. As of March 31, 2016 , the Company's estimate for its total legal liability for all such clean-up and remediation costs was approximately $0.1 million in the aggregate for all current and prior year claims.

Derivative Financial Instrument

Derivative Financial Instruments	3 Months Ended
	Mar. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments The final settlement of the Company's interest rate swaps occurred in July 2015. The following table presents pre-tax losses from changes in fair value of the Company's interest rate swaps, included in earnings (in thousands): Three Months Ended March 31, 2016 2015 Loss reclassified from AOCI into net income from cash flow hedges (effective portion) $ — $ 1,848 Loss recognized in income from de-designated derivative contracts — 945 Derivative interest expense $ — $ 2,793 Losses (benefits) on cash flow hedging, reclassified out of AOCI into the consolidated income statements were as follows (in thousands): Three Months Ended March 31, Reclassified to: 2016 2015 Interest rate swaps Derivative interest expense $ — $ 1,848 Income tax benefit Income tax expense — (711 ) Net income $ — $ 1,137 Activities related to AOCI, net of tax, are presented in the consolidated statement of stockholders' equity, and primarily pertain to derivative financial instruments. The tax effects are presented in the consolidated statements of comprehensive income. Activities related to foreign currency transactions were immaterial for the three months ended March 31, 2016 and 2015 .

Share Repurchase Program Share

Share Repurchase Program Share Repurchase Program	3 Months Ended
	Mar. 31, 2016
Class of Stock Disclosures [Abstract]
Share Repurchase Program	Share Repurchase Programs The following table presents our repurchases of our Class A common stock under the respective share repurchase programs, net of advisory fees (in thousands): Three Months Ended March 31, As of Share Repurchase Programs 2016 March 31, 2016 Authorized Amount Board Approval Date Shares Amount Amount Remaining $100,000 September 24, 2015 2,221 $ 30,000 $ — $150,000 February 22, 2016 903 $ 15,000 $ 135,000 3,124 $ 45,000 $ 135,000 No share repurchases were made during the three months ended March 31, 2015 .

Weighted Average Shares Outstan

Weighted Average Shares Outstanding	3 Months Ended
	Mar. 31, 2016
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Weighted Average Shares Outstanding	Weighted Average Shares Outstanding The following table reconciles basic weighted average shares outstanding to diluted weighted average shares outstanding (in thousands): Three Months Ended March 31, 2016 2015 Basic weighted average common shares outstanding 136,519 142,199 Dilutive effect of stock options 1,136 1,756 Diluted weighted average common shares outstanding 137,655 143,955 Anti-dilutive shares excluded from the dilutive-effect calculation (1) 452 — ____________ (1) Shares were excluded from the dilutive-effect calculation because the outstanding options' exercise prices were greater than the average market price of the Company's common shares during the period.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Effective Tax Rate — The effective tax rate for the three months ended March 31, 2016 was 29.8% , which was lower than management's expectation of 38.0% , primarily due to certain income tax credits in our foreign subsidiary and a reduction in our uncertain tax position reserve realized as discrete items in the quarter. The effective tax rate for the three months ended March 31, 2015 was 38.5% , as expected. Interest and Penalties — Accrued interest and penalties included in income tax expense as of March 31, 2016 and December 31, 2015 were approximately $0.4 million and $1.4 million , respectively. The Company does not anticipate a decrease of unrecognized tax benefits during the next twelve months . Tax Examinations — Certain of the Company’s subsidiaries are currently under examination by the Internal Revenue Service and various state jurisdictions for tax years ranging from 2010 through 2013 . At the completion of these examinations, management does not expect any adjustments that would have a material impact on the Company’s effective tax rate. Years subsequent to 2011 remain subject to examination.

Fair Value Measurement

Fair Value Measurement	3 Months Ended
	Mar. 31, 2016
Fair Value Disclosures [Abstract]
Fair Value Measurement	Fair Value Measurement The following table presents the carrying amounts and estimated fair values of the Company’s financial instruments (in thousands): March 31, 2016 December 31, 2015 Carrying Estimated Carrying Estimated Financial Assets: Restricted investments (1) $ 23,171 $ 23,175 $ 23,215 $ 23,190 Financial Liabilities: 2015 Agreement: New Term Loan A, due July 2020 (2) 638,687 639,750 668,055 669,750 Accounts receivable securitization (3) 224,017 225,000 223,927 225,000 Revolving line of credit (4) 200,000 200,000 200,000 200,000 ____________ The carrying amounts of the final instruments shown in the table are included in the consolidated balance sheets, as follows: (1) Restricted investments are included in "Restricted investments, held to maturity, amortized cost." (2) The New Term Loan A is included in "Current portion of long-term debt" and "Long-term debt, less current portion." Carrying value is net of $1.1 million and $1.7 million DLC as of March 31, 2016 and December 31, 2015 , respectively. (3) Carrying value is net of $1.0 million and $1.1 million DLC as of March 31, 2016 and December 31, 2015 , respectively. (4) The New Revolver (due July 2020) is included in "Revolving line of credit." Recurring Fair Value Measurements As of March 31, 2016 , and December 31, 2015 , no major categories of assets or liabilities included in the Company's consolidated balance sheets at estimated fair value were measured on a recurring basis. Nonrecurring Fair Value Measurements As of March 31, 2016 , there were no assets or liabilities on the Company's consolidated balance sheet estimated at fair value that were measured on a nonrecurring basis. The following table depicts the level in the fair value hierarchy of the inputs used to estimate fair value of assets measured on a nonrecurring basis as of December 31, 2015 (in thousands): Fair Value Measurements at Reporting Date Using: Estimated Level 1 Inputs Level 2 Inputs Level 3 Inputs Total Gains (Losses) As of December 31, 2015 Note receivable $ — $ — $ — $ — $ (1,480 ) In September 2013, the Company agreed to advance up to $2.3 million , pursuant to an unsecured promissory note, to an independent fleet contractor that transported freight on Swift's behalf. In March 2015, management became aware that the independent contractor violated various covenants outlined in the unsecured promissory note, which created an event of default that made the principal and accrued interest immediately due and payable. As a result of this event of default, as well as an overall decline in the independent contractor's financial condition, management re-evaluated the fair value of the unsecured promissory note. At March 31, 2015, management determined that the remaining balance due from the independent contractor to the Company was not collectible, which resulted in a $1.5 million pre-tax adjustment that was recorded in "Non-cash impairments of non-operating assets" in the Company's consolidated income statement. As of December 31, 2015 , there were no liabilities on the Company's consolidated balance sheet estimated at fair value that were measured on a nonrecurring basis.

Segments and Geography

Segments and Geography	3 Months Ended
	Mar. 31, 2016
Segment Reporting [Abstract]
Segments and Geography	Segments and Geography Segment Information The Company’s four reportable operating segments are Truckload, Dedicated, Swift Refrigerated and Intermodal. Truckload — The Truckload segment consists of one-way movements over irregular routes throughout the United States, Mexico, and Canada. This service utilizes both company and owner-operator tractors with dry van, flatbed, and other specialized trailing equipment. Dedicated — Through the Dedicated segment, the Company devotes use of equipment to specific customers and offers tailored solutions under long-term contracts. This segment utilizes refrigerated, dry van, flatbed and other specialized trailing equipment. Swift Refrigerated — This segment primarily consists of shipments for customers that require temperature-controlled trailers. These shipments include one-way movements over irregular routes, as well as dedicated truck operations. Intermodal — The Intermodal segment includes revenue generated by moving freight over the rail in the Company's containers and other trailing equipment, combined with revenue for drayage to transport loads between the railheads and customer locations. Non-reportable Segment — The non-reportable segment includes the Company's logistics and freight brokerage services, as well as support services that its subsidiaries provide to customers and owner-operators, including repair and maintenance shop services, equipment leasing, and insurance. Intangible amortization related to the 2007 Transactions is also included in this other non-reportable segment. Intersegment Eliminations — Certain operating segments provide transportation and related services for other affiliates outside their reportable segment. Revenues for such services are based on negotiated rates, which we believe approximate fair value, and are reflected as revenues of the billing segment. These rates are adjusted from time to time, based on market conditions. Such intersegment revenues and expenses are eliminated in our consolidated results. Set forth in the tables below is certain financial information with respect to the Company’s reportable segments (in thousands): Three Months Ended March 31, Operating revenue: 2016 2015 Truckload $ 492,522 $ 538,341 Dedicated 227,914 217,775 Swift Refrigerated 84,685 95,568 Intermodal 82,548 90,354 Subtotal 887,669 942,038 Non-reportable segment 99,248 91,622 Intersegment eliminations (19,094 ) (18,516 ) Consolidated operating revenue $ 967,823 $ 1,015,144 Three Months Ended March 31, Operating income (loss): 2016 2015 Truckload $ 36,287 $ 56,854 Dedicated 23,858 14,345 Swift Refrigerated (332 ) 4,799 Intermodal (2,908 ) (1,243 ) Subtotal 56,905 74,755 Non-reportable segment (4,422 ) 245 Consolidated operating income $ 52,483 $ 75,000 Three Months Ended March 31, Depreciation and amortization of property and equipment: 2016 2015 Truckload $ 31,283 $ 28,610 Dedicated 16,358 14,273 Swift Refrigerated 4,634 3,294 Intermodal 3,179 3,252 Subtotal 55,454 49,429 Non-reportable segment 11,497 7,498 Consolidated depreciation and amortization of property and equipment $ 66,951 $ 56,927 Geographical Information In aggregate, operating revenue from the Company's foreign operations was less than 5.0% of consolidated operating revenue for the three months ended March 31, 2016 and 2015 . Additionally, long-lived assets on the Company's foreign subsidiaries' balance sheets were less than 5.0% of consolidated total assets as of March 31, 2016 and December 31, 2015 .

Contingencies and Legal Proce23

Contingencies and Legal Proceedings Contingencies and Legal Proceedings (Policies)	3 Months Ended
	Mar. 31, 2016
Accounting Policies [Abstract]
Loss Contingencies, Policy	The Company is involved in certain claims and pending litigation primarily arising in the normal course of business. The majority of these claims relate to workers' compensation, auto collision and liability, and physical damage and cargo damage. The Company expenses legal fees as incurred and accrues for the uninsured portion of contingent losses from these and other pending claims when it is both probable that a liability has been incurred and the amount of the loss can be reasonably estimated. Based on the knowledge of the facts and, in certain cases, advice of outside counsel, management believes the resolution of claims and pending litigation, taking into account existing reserves, will not have a material adverse effect on the Company. Moreover, the results of complex legal proceedings are difficult to predict and the Company’s view of these matters may change in the future as the litigation and events related thereto unfold. For certain cases described below, management is unable to provide a meaningful estimate of the possible loss or range of loss because, among other reasons, (1) the proceedings are in various stages; (2) damages have not been sought; (3) damages are unsupported and/or exaggerated; (4) there is uncertainty as to the outcome of pending appeals; and/or (5) there are significant factual issues to be resolved. For these cases, however, management does not believe, based on currently available information, that the outcomes of these proceedings will have a material adverse effect on our financial condition, though the outcomes could be material to our operating results for any particular period, depending, in part, upon the operating results for such period.

Introduction and Basis Of Pre24

Introduction and Basis Of Presentation Introduction and Basis of Presentation (Tables)	3 Months Ended
	Mar. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]	The Company retrospectively adjusted the December 31, 2015 consolidated balance sheet to align with the current period presentation, as follows: December 31, 2015 Financial Statement Caption Unadjusted Consolidated Balance Sheet Reclassification Adjustments Adjusted Consolidated Balance Sheet ASSETS: Other assets $ 29,353 $ (2,768 ) $ 26,585 LIABILITIES: Current portion of long-term debt $ 35,582 $ (68 ) $ 35,514 Long-term debt, less current portion 645,290 (1,627 ) 643,663 Accounts receivable securitization 225,000 (1,073 ) 223,927

Recently Issued Accounting Pr25

Recently Issued Accounting Pronouncements Recently Issued Accounting Pronouncements (Tables)	3 Months Ended
	Mar. 31, 2016
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Description of New Accounting Pronouncements Not yet Adopted [Table Text Block]	The following table presents accounting pronouncements recently issued by FASB, but not yet adopted by the Company. Date Issued Reference Description Expected Adoption Date and Method Financial Statement Impact April 2016 2016-10: Revenue from Contracts with Customers (Topic 606) – Identifying Performance Obligations and Licensing The amendments in this ASU clarify the following two aspects of Topic 606: identifying performance obligations and the licensing implementation guidance, while retaining the related principles for those areas. The amendments do not change the core principle of the guidance. January 2018, Modified retrospective Currently under evaluation; not yet quantifiable. March 2016 2016-08: Revenue from Contracts with Customers (Topic 606) – Principal versus Agent Considerations (Reporting Revenue Gross versus Net) The amendments in this ASU are intended to improve the operability and understandability of the implementation guidance on principal versus agent considerations, but do not change the core principle of the guidance. January 2018, Modified retrospective Currently under evaluation; not yet quantifiable. March 2016 2016-09: Compensation – Stock Compensation (Topic 718) – Improvements to Employee Share-based Payment Accounting The amendments in this ASU are intended to simplify various aspects of accounting for stock-based compensation, including income tax consequences, classification of awards as equity or liability, as well as classification of activities within the statement of cash flows. January 2017, Adoption method varies by amendment Currently under evaluation; not yet quantifiable. February 2016 2016-02: Leases (Topic 842) The new standard requires lessees to recognize assets and liabilities arising from both operating and financing leases on the balance sheet. Lessor accounting for leases is largely unaffected by the new guidance. January 2019, Modified retrospective Currently under evaluation; not yet quantifiable. January 2016 2016-01: Financial Instruments – Overall (Subtopic 825-10) – Recognition and Measurement of Financial Assets and Financial Liabilities The amendments in this ASU address various aspects of recognition, measurement, presentation, and disclosure of financial instruments. They additionally establish ASC Topic 321 – Investments – Equity Securities, which applies to investments in equity securities and other ownership interests in an entity, including investments in partnerships, unincorporated joint ventures and limited liability companies. January 2018, Modified retrospective Not expected to be material.

Restricted Investments (Tables)

Restricted Investments (Tables)	3 Months Ended
	Mar. 31, 2016
Schedule of Investments [Abstract]
Amortized Cost, Gross Unrealized Gains And Losses, Estimated Fair Value Of Fixed Maturity Securities	The following table presents the cost or amortized cost, gross unrealized gains and temporary losses, and estimated fair value of the Company’s restricted investments (in thousands): March 31, 2016 Gross Unrealized Cost or Amortized Gains Temporary Estimated Fair Value United States corporate securities $ 16,867 $ 8 $ (3 ) $ 16,872 Municipal bonds 4,879 — (1 ) 4,878 Negotiable certificate of deposits 1,425 — — 1,425 Restricted investments, held to maturity $ 23,171 $ 8 $ (4 ) $ 23,175 December 31, 2015 Gross Unrealized Cost or Amortized Gains Temporary Estimated Fair Value United States corporate securities $ 16,686 $ 2 $ (27 ) $ 16,661 Municipal Bonds 4,904 1 (1 ) 4,904 Negotiable certificate of deposits 1,625 — — 1,625 Restricted investments, held to maturity $ 23,215 $ 3 $ (28 ) $ 23,190

Goodwill and Other Intangible27

Goodwill and Other Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Intangible Assets, net [Table Text Block]	Intangible asset balances were as follows (in thousands): March 31, December 31, Customer Relationships: Gross carrying value $ 275,324 $ 275,324 Accumulated amortization (177,446 ) (173,242 ) Customer relationships, net 97,878 102,082 Trade Name: Gross carrying value 181,037 181,037 Intangible assets, net $ 278,915 $ 283,119
Finite-lived Intangible Assets Amortization Expense [Table Text Block]	The following table presents amortization of intangible assets related to the 2007 Transactions and intangible assets existing prior to the 2007 Transactions (in thousands): Three Months Ended March 31, 2016 2015 Amortization of intangible assets related to the 2007 Transactions $ 3,912 $ 3,912 Amortization related to intangible assets existing prior to the 2007 Transactions 292 292 Amortization of intangibles $ 4,204 $ 4,204

Debt And Financing Debt and Fin

Debt And Financing Debt and Financing (Tables)	3 Months Ended
	Mar. 31, 2016
Debt Disclosure [Abstract]
Schedule of Debt Balances by Instrument [Table Text Block]	Other than the Company’s accounts receivable securitization, as discussed in Note 5, and its outstanding capital lease obligations as discussed in Note 7, the Company's long-term debt consisted of the following (in thousands): March 31, December 31, 2015 Agreement: New Term Loan A, due July 2020, net of $1,063 and $1,695 DLC as of March 31, 2016 and December 31, 2015, respectively $ 638,687 $ 668,055 Other 8,476 11,122 Long-term debt 647,163 679,177 Less: current portion of long-term debt, net of $3 and $68 DLC as of March 31, 2016 and December 31, 2015, respectively (15,543 ) (35,514 ) Long-term debt, less current portion $ 631,620 $ 643,663 March 31, December 31, Long-term debt $ 647,163 $ 679,177 Revolving line of credit (1) 200,000 200,000 Long-term debt, including revolving line of credit $ 847,163 $ 879,177 ____________ (1) The Company had outstanding letters of credit, primarily related to workers' compensation and self-insurance liabilities of $101.0 million and $95.0 million under the New Revolver at March 31, 2016 and December 31, 2015 , respectively.
Schedule of Long-term Debt Instruments	The following table presents the key terms of the 2015 Agreement (dollars in thousands): Description New Term Loan A New Revolver (2) Maximum borrowing capacity $680,000 $600,000 Final maturity date July 27, 2020 July 27, 2020 Interest rate base LIBOR LIBOR LIBOR floor —% —% Interest rate minimum margin (1) 1.50% 1.50% Interest rate maximum margin (1) 2.25% 2.25% Minimum principal payment — amount (3) $6,625 $— Minimum principal payment — frequency Quarterly Once Minimum principal payment — commencement date (3) December 31, July 27, ____________ (1) The interest rate margin for the New Term Loan A and New Revolver is based on the Company's consolidated leverage ratio. As of March 31, 2016 , interest accrued at 1.93% on the New Term Loan A and 1.94% on the New Revolver. As of December 31, 2015, interest accrued at 2.12% on the New Term Loan A and 2.08% on the New Revolver. (2) The commitment fee for the unused portion of the New Revolver is based on the Company's consolidated leverage ratio, and ranges from 0.25% to 0.35% . As of March 31, 2016 , commitment fees on the unused portion of the New Revolver accrued at 0.25% and outstanding letter of credit fees accrued at 1.50% . As of December 31, 2015, commitment fees on the unused portion of the New Revolver accrued at 0.25% and outstanding letter of credit fees accrued at 1.75% . (3) Commencing in March 2017, the minimum quarterly payment amount on the New Term Loan A is $12.3 million , at which it remains until final maturity.

Derivative Financial Instrume29

Derivative Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Classification Of Gains And Losses On Interest Rate Derivative Contracts Designated As Hedging Instruments	The following table presents pre-tax losses from changes in fair value of the Company's interest rate swaps, included in earnings (in thousands): Three Months Ended March 31, 2016 2015 Loss reclassified from AOCI into net income from cash flow hedges (effective portion) $ — $ 1,848 Loss recognized in income from de-designated derivative contracts — 945 Derivative interest expense $ — $ 2,793
Reclassification out of Accumulated Other Comprehensive Income	Losses (benefits) on cash flow hedging, reclassified out of AOCI into the consolidated income statements were as follows (in thousands): Three Months Ended March 31, Reclassified to: 2016 2015 Interest rate swaps Derivative interest expense $ — $ 1,848 Income tax benefit Income tax expense — (711 ) Net income $ — $ 1,137

Share Repurchase Program Shar30

Share Repurchase Program Share Repurchase Program (Tables)	3 Months Ended
	Mar. 31, 2016
Class of Stock Disclosures [Abstract]
Class of Treasury Stock [Table Text Block]	The following table presents our repurchases of our Class A common stock under the respective share repurchase programs, net of advisory fees (in thousands): Three Months Ended March 31, As of Share Repurchase Programs 2016 March 31, 2016 Authorized Amount Board Approval Date Shares Amount Amount Remaining $100,000 September 24, 2015 2,221 $ 30,000 $ — $150,000 February 22, 2016 903 $ 15,000 $ 135,000 3,124 $ 45,000 $ 135,000

Weighted Average Shares Outst31

Weighted Average Shares Outstanding (Tables)	3 Months Ended
	Mar. 31, 2016
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Calculation Of Basic And Diluted Earnings Per Share Attributable To Stockholders	The following table reconciles basic weighted average shares outstanding to diluted weighted average shares outstanding (in thousands): Three Months Ended March 31, 2016 2015 Basic weighted average common shares outstanding 136,519 142,199 Dilutive effect of stock options 1,136 1,756 Diluted weighted average common shares outstanding 137,655 143,955 Anti-dilutive shares excluded from the dilutive-effect calculation (1) 452 — ____________ (1) Shares were excluded from the dilutive-effect calculation because the outstanding options' exercise prices were greater than the average market price of the Company's common shares during the period.

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	3 Months Ended
	Mar. 31, 2016
Fair Value Disclosures [Abstract]
Fair Value by Balance Sheet Grouping	The following table presents the carrying amounts and estimated fair values of the Company’s financial instruments (in thousands): March 31, 2016 December 31, 2015 Carrying Estimated Carrying Estimated Financial Assets: Restricted investments (1) $ 23,171 $ 23,175 $ 23,215 $ 23,190 Financial Liabilities: 2015 Agreement: New Term Loan A, due July 2020 (2) 638,687 639,750 668,055 669,750 Accounts receivable securitization (3) 224,017 225,000 223,927 225,000 Revolving line of credit (4) 200,000 200,000 200,000 200,000 ____________ The carrying amounts of the final instruments shown in the table are included in the consolidated balance sheets, as follows: (1) Restricted investments are included in "Restricted investments, held to maturity, amortized cost." (2) The New Term Loan A is included in "Current portion of long-term debt" and "Long-term debt, less current portion." Carrying value is net of $1.1 million and $1.7 million DLC as of March 31, 2016 and December 31, 2015 , respectively. (3) Carrying value is net of $1.0 million and $1.1 million DLC as of March 31, 2016 and December 31, 2015 , respectively. (4) The New Revolver (due July 2020) is included in "Revolving line of credit."
Fair Value Measurements, Nonrecurring	The following table depicts the level in the fair value hierarchy of the inputs used to estimate fair value of assets measured on a nonrecurring basis as of December 31, 2015 (in thousands): Fair Value Measurements at Reporting Date Using: Estimated Level 1 Inputs Level 2 Inputs Level 3 Inputs Total Gains (Losses) As of December 31, 2015 Note receivable $ — $ — $ — $ — $ (1,480 )

Segments and Geography (Tables)

Segments and Geography (Tables)	3 Months Ended
	Mar. 31, 2016
Segment Reporting [Abstract]
Summary Of Financial Information By Segments	Set forth in the tables below is certain financial information with respect to the Company’s reportable segments (in thousands): Three Months Ended March 31, Operating revenue: 2016 2015 Truckload $ 492,522 $ 538,341 Dedicated 227,914 217,775 Swift Refrigerated 84,685 95,568 Intermodal 82,548 90,354 Subtotal 887,669 942,038 Non-reportable segment 99,248 91,622 Intersegment eliminations (19,094 ) (18,516 ) Consolidated operating revenue $ 967,823 $ 1,015,144 Three Months Ended March 31, Operating income (loss): 2016 2015 Truckload $ 36,287 $ 56,854 Dedicated 23,858 14,345 Swift Refrigerated (332 ) 4,799 Intermodal (2,908 ) (1,243 ) Subtotal 56,905 74,755 Non-reportable segment (4,422 ) 245 Consolidated operating income $ 52,483 $ 75,000 Three Months Ended March 31, Depreciation and amortization of property and equipment: 2016 2015 Truckload $ 31,283 $ 28,610 Dedicated 16,358 14,273 Swift Refrigerated 4,634 3,294 Intermodal 3,179 3,252 Subtotal 55,454 49,429 Non-reportable segment 11,497 7,498 Consolidated depreciation and amortization of property and equipment $ 66,951 $ 56,927

Introduction and Basis Of Pre34

Introduction and Basis Of Presentation (Details)	3 Months Ended
	Mar. 31, 2016SegmentVehicle
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of tractors in fleet	19,858
Number of tractors driven by company drivers	14,986
Number of owner-operator tractors	4,872
Number of trailers	63,891
Number of intermodal containers	9,150
Number of reportable segments | Segment	4

Introduction and Basis Of Pre35

Introduction and Basis Of Presentation Recently Issued Accounting Pronouncements (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Recently Issued Accounting Pronouncements [Line Items]
Other assets	$ 24,573	$ 26,585
Current portion of long-term debt	15,543	35,514
Long-term debt, less current portion	631,620	643,663
Accounts receivable securitization	$ 224,017	223,927
Scenario, Previously Reported [Member]
Recently Issued Accounting Pronouncements [Line Items]
Other assets		29,353
Current portion of long-term debt		35,582
Long-term debt, less current portion		645,290
Accounts receivable securitization		225,000
Restatement Adjustment [Member]
Recently Issued Accounting Pronouncements [Line Items]
Other assets		(2,768)
Current portion of long-term debt		(68)
Long-term debt, less current portion		(1,627)
Accounts receivable securitization		$ (1,073)
Accounting Standards Update 2015-03 [Member]
Recently Issued Accounting Pronouncements [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Description	ASU 2015-03, Simplifying the Presentation of Debt Issuance Costs, which amended ASC Subtopic 835-30, Interest – Imputation of Interest. The amendments in this ASU simplify the presentation of debt issuance costs and align the presentation with debt discounts. Entities are required to present debt issuance costs within liabilities as a direct deduction from the face amount of the related debt, rather than as a deferred charge within assets.
New Accounting Pronouncement or Change in Accounting Principle, Description of Transition Method	retrospective application, with related disclosures for a change in accounting principle. For public business entities, the amendments in these ASUs are effective for financial statements issued for fiscal years beginning after December 15, 2015, and the interim periods within those fiscal years, with early adoption permitted.
accounting standards update 2015 15 [Member]
Recently Issued Accounting Pronouncements [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Description	ASU 2015-15, Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements – Amendments to SEC Paragraphs Pursuant to Staff Announcement at June 18, 2015 EITF Meeting (SEC Update), which also amended ASC Subtopic 835-30, Interest – Imputation of Interest. The SEC determined that ASU 2015-03 (discussed above) did not address costs related to line-of-credit arrangements. The amendments in ASU 2015-15 clarify that entities may defer and present debt issuance costs as an asset, and subsequently amortize the deferred debt issuance costs ratably over the term of the line-of-credit arrangement, regardless of whether there are any outstanding borrowings on the line-of-credit arrangement.
New Accounting Pronouncement or Change in Accounting Principle, Description of Transition Method	retrospective application, with related disclosures for a change in accounting principle. For public business entities, the amendments in these ASUs are effective for financial statements issued for fiscal years beginning after December 15, 2015, and the interim periods within those fiscal years, with early adoption permitted.

Recently Issued Accounting Pr36

Recently Issued Accounting Pronouncements Recently Issued Accounting Pronouncements (Details)	3 Months Ended
	Mar. 31, 2016
Accounting Standards Update 2016-10 [Member]
Recently Issued Accounting Pronouncements [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Description	The amendments in this ASU clarify the following two aspects of Topic 606: identifying performance obligations and the licensing implementation guidance, while retaining the related principles for those areas. The amendments do not change the core principle of the guidance.
New Accounting Pronouncement or Change in Accounting Principle, Description of Transition Method	January 2018, Modified retrospective
New Accounting Pronouncement, Transition Guidance Not Significant or Not Practical	Currently under evaluation; not yet quantifiable.
Accounting Standards Update 2016-08 [Member]
Recently Issued Accounting Pronouncements [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Description	The amendments in this ASU are intended to improve the operability and understandability of the implementation guidance on principal versus agent considerations, but do not change the core principle of the guidance.
New Accounting Pronouncement or Change in Accounting Principle, Description of Transition Method	January 2018, Modified retrospective
New Accounting Pronouncement, Transition Guidance Not Significant or Not Practical	Currently under evaluation; not yet quantifiable.
Accounting Standards Update 2016-09 [Member]
Recently Issued Accounting Pronouncements [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Description	The amendments in this ASU are intended to simplify various aspects of accounting for stock-based compensation, including income tax consequences, classification of awards as equity or liability, as well as classification of activities within the statement of cash flows.
New Accounting Pronouncement or Change in Accounting Principle, Description of Transition Method	January 2017, Adoption method varies by amendment
New Accounting Pronouncement, Transition Guidance Not Significant or Not Practical	Currently under evaluation; not yet quantifiable.
Accounting Standards Update 2016-02 [Member]
Recently Issued Accounting Pronouncements [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Description	The new standard requires lessees to recognize assets and liabilities arising from both operating and financing leases on the balance sheet. Lessor accounting for leases is largely unaffected by the new guidance.
New Accounting Pronouncement or Change in Accounting Principle, Description of Transition Method	January 2019, Modified retrospective
New Accounting Pronouncement, Transition Guidance Not Significant or Not Practical	Currently under evaluation; not yet quantifiable.
Accounting Standards Update 2016-01 [Member]
Recently Issued Accounting Pronouncements [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Description	The amendments in this ASU address various aspects of recognition, measurement, presentation, and disclosure of financial instruments. They additionally establish ASC Topic 321 – Investments – Equity Securities, which applies to investments in equity securities and other ownership interests in an entity, including investments in partnerships, unincorporated joint ventures and limited liability companies.
New Accounting Pronouncement or Change in Accounting Principle, Description of Transition Method	January 2018, Modified retrospective
New Accounting Pronouncement, Transition Guidance Not Significant or Not Practical	Not expected to be material.

Restricted Investments (Details

Restricted Investments (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)Securities	Dec. 31, 2015USD ($)Securities
Restricted Investments [Line Items]
Cost or Amortized Cost	$ 23,171	$ 23,215
Gross Unrealized Gains	8	3
Gross Unrealized Temporary Losses	4	28
Estimated Fair Value	$ 23,175	$ 23,190
Securities with unrealized losses for less than 12 months | Securities	33	36
SWFT_Duration of Securities in Unrealized Loss Position	12 months
Maximum [Member]
Restricted Investments [Line Items]
Contractual maturities of fixed maturity securities	1 year
United States corporate securities [Member]
Restricted Investments [Line Items]
Cost or Amortized Cost	$ 16,867	$ 16,686
Gross Unrealized Gains	8	2
Gross Unrealized Temporary Losses	3	27
Estimated Fair Value	16,872	16,661
Municipal Bonds [Member]
Restricted Investments [Line Items]
Cost or Amortized Cost	4,879	4,904
Gross Unrealized Gains	0	1
Gross Unrealized Temporary Losses	1	1
Estimated Fair Value	4,878	4,904
Negotiable certificate of deposit [Member]
Restricted Investments [Line Items]
Cost or Amortized Cost	1,425	1,625
Gross Unrealized Gains	0	0
Gross Unrealized Temporary Losses	0	0
Estimated Fair Value	$ 1,425	$ 1,625

Goodwill and Other Intangible38

Goodwill and Other Intangible Assets Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, Impairment Loss	$ 0	$ 0

Schedule of Intangible Assets (

Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Gross carrying value	$ 275,324	$ 275,324
Accumulated amortization	177,446	173,242
Customer relationships, net	97,878	102,082
Gross carrying value	181,037	181,037
Intangible assets, net	$ 278,915	$ 283,119

Goodwill and Other Intangible40

Goodwill and Other Intangible Assets Finite-lived Intangible Assets Amortization Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles	$ 4,204	$ 4,204
Amortization of intangible assets related to the 2007 Transactions [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles	3,912	3,912
Amortization related to intangible assets existing prior to the 2007 Transactions [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles	$ 292	$ 292

Accounts Receivable Securitiz41

Accounts Receivable Securitization (Details) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
2015 RSA [Member]
Servicing Liabilities at Fair Value [Line Items]
Debt Instrument, Interest Rate During Period	1.00%	1.00%
Debt Instrument, Collateral Fee			$ 0.9
2013 RSA [Member]
Servicing Liabilities at Fair Value [Line Items]
Debt Instrument, Collateral Fee				$ 1

Schedule of Debt Balances by In

Schedule of Debt Balances by Instrument (Details) - USD ($) $ in Thousands		Mar. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Long-term debt		$ 647,163	$ 679,177
Long-term debt		647,163	679,177
Less: current portion of long-term debt		(15,543)	(35,514)
Long-term debt, less current portion		631,620	643,663
Revolving line of credit	[1]	200,000	200,000
Long-term debt, including revolving line of credit		847,163	879,177
Letters of Credit Outstanding, Amount		101,000	95,000
2015 Agreement, New Term Loan A [Member]
Debt Instrument [Line Items]
Debt Issuance Costs, Noncurrent, Net		1,063	1,695
Debt Issuance Costs, Current, Net		3	68
Long-term debt		638,687	668,055
Long-term debt		638,687	668,055
Other Debt Obligations [Member]
Debt Instrument [Line Items]
Long-term debt		8,476	11,122
Long-term debt		$ 8,476	$ 11,122
[1]	(1)The Company had outstanding letters of credit, primarily related to workers' compensation and self-insurance liabilities of $101.0 million and $95.0 million under the New Revolver at March 31, 2016 and December 31, 2015, respectively.

Debt And Financing Schedule of

Debt And Financing Schedule of Long-term Debt Instruments (Details) - USD ($) $ in Thousands		Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2016	Jun. 30, 2020
2015 Agreement, New Term Loan A [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 680,000		$ 680,000
Final maturity date				Jul. 27, 2020
Interest rate base				LIBOR
LIBOR Floor				0.00%
Minimum principal payment - amount	[1]			$ 6,625
Minimum principal payment - frequency				Quarterly
Minimum principal payment - commencement date	[1]			Dec. 31, 2015
Debt Instrument, Interest Rate During Period		1.93%	2.12%
2015 Agreement, Credit Facility [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 600,000		$ 600,000
Final maturity date				Jul. 27, 2020
Interest rate base				LIBOR
LIBOR Floor				0.00%
Minimum principal payment - amount				$ 0
Minimum principal payment - frequency				Once
Minimum principal payment - commencement date				Jul. 27, 2020
Debt Instrument, Interest Rate During Period		1.94%	2.08%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage		0.25%	0.25%
Line of Credit Facility, Commitment Fee Percentage		1.50%	1.75%
Minimum [Member] | 2015 Agreement, New Term Loan A [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	[2]			1.50%
Minimum [Member] | 2015 Agreement, Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	[2]			1.50%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage				0.25%
Maximum [Member] | 2015 Agreement, New Term Loan A [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	[2]			2.25%
Maximum [Member] | 2015 Agreement, Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	[2]			2.25%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage				0.35%
Future min quarterly principal payment second step up [Member] | 2015 Agreement, New Term Loan A [Member]
Debt Instrument [Line Items]
Minimum principal payment - amount					$ 12,300
[1]	(3)Commencing in March 2017, the minimum quarterly payment amount on the New Term Loan A is $12.3 million, at which it remains until final maturity.
[2]	(1)The interest rate margin for the New Term Loan A and New Revolver is based on the Company's consolidated leverage ratio. As of March 31, 2016, interest accrued at 1.93% on the New Term Loan A and 1.94% on the New Revolver. As of December 31, 2015, interest accrued at 2.12% on the New Term Loan A and 2.08% on the New Revolver.

Debt And Financing (Narrative)

Debt And Financing (Narrative) (Details) - USD ($) $ in Thousands	Jul. 27, 2015	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Debt Instrument [Line Items]
Proceeds from long-term debt		$ 0	$ 4,504
Net repayments on revolving line of credit		0	$ (57,000)
Repayments of Debt	$ 4,900
Deferred Loan Costs		1,900		$ 1,500
2014 Agreement, Credit Facility [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity	450,000
Extinguishment of Debt, Amount	0
2014 Agreement, Old Term Loan A [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity	500,000
Extinguishment of Debt, Amount	485,000
2014 Agreement, Term Loan B [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity	400,000
Extinguishment of Debt, Amount	395,000
2015 Agreement, New Term Loan A [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity		680,000
Proceeds from long-term debt	680,000
2015 Agreement, Credit Facility [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 600,000
Net repayments on revolving line of credit	$ 200,000

Leases (Details)

Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Leases [Abstract]
Accumulated amortization	$ 80,900		$ 90,100
Capital Leases, Net Investment in Direct Financing Leases	328,200		$ 357,800
Rental Expense	$ 56,252	$ 61,975

Purchase Commitments Purchase46

Purchase Commitments Purchase Commitments (Details)	3 Months Ended
	Mar. 31, 2016USD ($)
Long-term Purchase Commitment [Line Items]
Percentage Of Cancel Tractor Purchase Orders	30.10%
Minimum [Member]
Long-term Purchase Commitment [Line Items]
Duration Of Option To Cancel Purchase Orders	60 days
Maximum [Member]
Long-term Purchase Commitment [Line Items]
Duration Of Option To Cancel Purchase Orders	90 days
Capital Addition Purchase Commitments Total Revenue Equipment [Member]
Long-term Purchase Commitment [Line Items]
Purchase Obligation, Due in Next Twelve Months	$ 550,500,000
Purchase Obligation, Due in Second Year	204,700,000
Purchase Obligation, Due in Third Year	0
Capital Addition Purchase Commitments of Tractors [Member]
Long-term Purchase Commitment [Line Items]
Purchase Obligation, Due in Next Twelve Months	395,400,000
Purchase Obligation, Due in Second Year	190,900,000
Capital Addition Purchase Commitments Non revenue equipment [Member]
Long-term Purchase Commitment [Line Items]
Purchase Obligation, Due in Next Twelve Months	13,100,000
Capital Addition Purchase Commitments Facilities [Member]
Long-term Purchase Commitment [Line Items]
Purchase Obligation, Due in Next Twelve Months	$ 0

Contingencies and Legal Proce47

Contingencies and Legal Proceedings (Details) $ in Millions	3 Months Ended
	Mar. 31, 2016USD ($)plaintiff
Arizona owner operator class action 1 [Member]
Loss Contingencies [Line Items]
Lawsuit filing date	January 30, 2004
Loss contingency, name of plaintiffs	Leonel Garza
Loss Contingency, Name of Defendant	Swift Transportation Co., Inc
Loss Contingency, Allegations	alleging that the Company should have reimbursed owner-operators for actual miles driven rather than the contracted and industry standard remuneration based upon dispatched miles.
Ninth circuit owner operator misclassification class action 1 [Member]
Loss Contingencies [Line Items]
Lawsuit filing date	December 22, 2009
Loss contingency, name of plaintiffs	Virginia VanDusen, John Doe 1 and Joseph Sheer
Loss Contingency, Name of Defendant	Swift Transportation Co., Inc., Interstate Equipment Leasing, Inc., Jerry Moyes, and Chad Killebrew
Loss Contingency, Allegations	owner-operators alleging that Swift Transportation misclassified owner-operators as independent contractors in violation of the federal Fair Labor Standards Act ("FLSA"), and various New York and California state laws and that such owner-operators should be considered employees. The lawsuit also raises certain related issues with respect to the lease agreements that certain owner-operators have entered into with IEL.
Loss Contingency, Number of Plaintiffs	450
California Wage Meal And Rest Driver Class Action 1 [Member]
Loss Contingencies [Line Items]
Lawsuit filing date	March 22, 2010
Loss contingency, name of plaintiffs	John Burnell
Loss Contingency, Name of Defendant	Swift Transportation
Loss Contingency, Allegations	alleges that Swift failed to pay the California minimum wage, failed to provide proper meal and rest periods and failed to timely pay wages upon separation from employment.
California Wage Meal And Rest Driver Class Action 5 [Member]
Loss Contingencies [Line Items]
Lawsuit filing date	April 5, 2012
Loss contingency, name of plaintiffs	James R. Rudsell
Loss Contingency, Name of Defendant	Swift Transportation Co. of Arizona, LLC and Swift Transportation Company
Loss Contingency, Allegations	alleging facts similar to those as set forth in the Burnell Complaint:
California Wage Meal and Rest Driver Class Action 2 [Member]
Loss Contingencies [Line Items]
Lawsuit filing date	September 25, 2014
Loss contingency, name of plaintiffs	Lawrence Peck
Loss Contingency, Name of Defendant	Swift Transportation Co. of Arizona, LLC
Loss Contingency, Allegations	alleges that Swift failed to pay for all hours worked (specifically that pay-per-mile fails to compensate drivers for non-driving related services), failed to pay overtime, failed to properly reimburse work-related expenses, failed to timely pay wages and failed to provide accurate wage statements.
California Wage Meal And Rest Driver Class Action 3 [Member]
Loss Contingencies [Line Items]
Lawsuit filing date	February 27, 2015
Loss contingency, name of plaintiffs	Sadashiv Mares
Loss Contingency, Name of Defendant	Swift Transportation Co. of Arizona, LLC
Loss Contingency, Allegations	alleging five Causes of Action arising under California state law on behalf of himself and a putative class
California Wage Meal And Rest Driver Class Action 4 [Member]
Loss Contingencies [Line Items]
Lawsuit filing date	April 15, 2015
Loss contingency, name of plaintiffs	Rafael McKinsty et al.
Loss Contingency, Name of Defendant	Swift Transportation Co. of Arizona, LLC, et al.
Loss Contingency, Allegations	alleges violation of California rest break laws and is similar to the Burnell, Rudsell, Peck and Mares Complaints.
California Wage Meal And Rest Driver Class Action 6 [Member]
Loss Contingencies [Line Items]
Lawsuit filing date	October 15, 2015
Loss contingency, name of plaintiffs	Thor Nilsen
Loss Contingency, Name of Defendant	Swift Transportation Co. of Arizona, LLC
Loss Contingency, Allegations	alleges violations of California law similar to the Burnell, Rudsell, Peck, Mares, and McKinsty Complaints.
California Wage, Meal and Rest Maintenance & Service Employees Class Action [Member]
Loss Contingencies [Line Items]
Lawsuit filing date	January 28, 2016
Loss contingency, name of plaintiffs	Grant Fritsch
Loss Contingency, Name of Defendant	Swift Transportation Services, LLC and Swift Transportation Company
Loss Contingency, Allegations	alleges that Swift failed to pay overtime and doubletime wages required by California law, failed to provide proper meal and rest periods, failed to provide accurate itemized wage statements, and failed to timely pay wages upon separation from employment. The Complaint also includes a claim under the Private Attorneys General Act.
Arizona Fair Labor Standards Act Class Action Litigation [Member]
Loss Contingencies [Line Items]
Lawsuit filing date	December 29, 2015
Loss contingency, name of plaintiffs	Pamela Julian
Loss Contingency, Name of Defendant	Swift Transportation, Inc., et al.
Loss Contingency, Allegations	alleges that Swift violated the FLSA by failing to pay its trainee drivers minimum wage for all work performed and by failing to pay overtime.
Washington Overtime Class Action [Member]
Loss Contingencies [Line Items]
Lawsuit filing date	September 9, 2011
Loss contingency, name of plaintiffs	Troy Slack
Loss Contingency, Name of Defendant	Swift Transportation Co. of Arizona, LLC and Swift Transportation Corporation
Loss Contingency, Allegations	alleges that they were not paid minimum wage and overtime in accordance with Washington state law and that they suffered unlawful deductions from wages.
Washington Overtime Class Action 2 [Member]
Loss Contingencies [Line Items]
Lawsuit filing date	January 14, 2016
Loss contingency, name of plaintiffs	Julie Hedglin
Loss Contingency, Name of Defendant	Swift Transportation Co. of Arizona, LLC
Loss Contingency, Allegations	alleges the class was not paid for meal and rest periods, overtime, was not paid all wages due at established pay periods, and was not provided accurate wage statements.
Indiana Fair Credit Reporting Act Class Action Litigation [Member]
Loss Contingencies [Line Items]
Lawsuit filing date	March 18, 2015
Loss contingency, name of plaintiffs	Melvin Banks
Loss Contingency, Name of Defendant	Central Refrigerated Service, Inc.
Loss Contingency, Allegations	alleges that Central Refrigerated Service, Inc. violated the Fair Credit Reporting Act by failing to provide job applicants with adverse action notices and copies of their consumer reports and statements of rights.
Utah Collective And Individual Arbitration 1 [Member]
Loss Contingencies [Line Items]
Lawsuit filing date	June 1, 2012
Loss contingency, name of plaintiffs	Gabriel Cilluffo, Kevin Shire and Bryan Ratterree
Loss Contingency, Name of Defendant	Central Refrigerated Service, Inc., Central Leasing, Inc., Jon Isaacson, and Jerry Moyes
Loss Contingency, Allegations	alleged that the Central Parties misclassified owner-operator drivers as independent contractors and were therefore liable to these drivers for minimum wages and other employee benefits under the FLSA. The complaint also alleged a federal forced labor claim under 18 U.S.C. § 1589 and 1595, as well as fraud and other state-law claims.
notice of arbitration sent to owner operators	3,000
Loss Contingency, Number of Named Plaintiffs	3
Loss Contingency, Number of Plaintiffs	400
Number of Arbitrators	30
California Class and Collective Action for Pre-Employment Physical Testing [Member]
Loss Contingencies [Line Items]
Lawsuit filing date	October 6, 2014
Loss contingency, name of plaintiffs	Robin Anderson
Loss Contingency, Allegations	alleges that pre-employment tests of physical strength administered by a third party on behalf of Central Refrigerated Service, Inc. had an unlawfully discriminatory impact on female applicants and applicants over the age of 40.
Other environmental [Member]
Loss Contingencies [Line Items]
Loss Contingency, Range of Possible Loss, Maximum | $	$ 0.1
Defendant Central Refrigerated [Member] | California Class and Collective Action for Pre-Employment Physical Testing [Member]
Loss Contingencies [Line Items]
Loss Contingency, Name of Defendant	Central Refrigerated Service, Inc.
Defendant Swift Transportation Company [Member] | California Class and Collective Action for Pre-Employment Physical Testing [Member]
Loss Contingencies [Line Items]
Loss Contingency, Name of Defendant	Swift Transportation Company
Defendant Workwell Systems [Member] | California Class and Collective Action for Pre-Employment Physical Testing [Member]
Loss Contingencies [Line Items]
Loss Contingency, Name of Defendant	Workwell Systems, Inc.

Derivative Financial Instrume48

Derivative Financial Instruments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) recognized in income from de-designated derivative contracts	$ 0	$ 945
Derivative interest expense	0	2,793
Income tax expense	13,511	23,691
Net income	31,905	37,840
Reclassification out of Accumulated Other Comprehensive Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net income	0	1,137
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Loss reclassified from AOCI into net income from cash flow hedges (effective portion)	0	1,848
Income tax expense	$ 0	$ (711)

Share Repurchase Program Shar49

Share Repurchase Program Share Repurchase Program (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Equity, Share Repurchases [Line Items]
Repurchase and cancellation of Class A Common Stock, shares	3,124,000	0
Repurchase and cancellation of Class A Common Stock, value	$ 45,000
Amount Remaining	135,000
Repurchase Program authorized September 24, 2015 [Member]
Equity, Share Repurchases [Line Items]
Share Repurchase Program, Authorized Amount	$ 100,000
Repurchase and cancellation of Class A Common Stock, shares	2,221,000
Repurchase and cancellation of Class A Common Stock, value	$ 30,000
Amount Remaining	0
Repurchase Program authorized February 22, 2016 [Member]
Equity, Share Repurchases [Line Items]
Share Repurchase Program, Authorized Amount	$ 150,000
Repurchase and cancellation of Class A Common Stock, shares	903,000
Repurchase and cancellation of Class A Common Stock, value	$ 15,000
Amount Remaining	$ 135,000

Weighted Average Shares Outst50

Weighted Average Shares Outstanding (Details) - shares shares in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Basic:
Weighted average common shares outstanding		136,519	142,199
Diluted:
Dilutive effect of stock options		1,136	1,756
Diluted weighted average diluted shares outstanding		137,655	143,955
Anti-dilutive shares excluded from the dilutive-effect calculation	[1]	452	0
[1]	(1)Shares were excluded from the dilutive-effect calculation because the outstanding options' exercise prices were greater than the average market price of the Company's common shares during the period.

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Income Tax Contingency [Line Items]
Effective tax rate	29.80%	38.50%
Income tax expected tax rate	38.00%
Accrued interest and penalties	$ 0.4		$ 1.4
change in unrecognized tax benefits is not anticipated	twelve months
Minimum [Member]
Income Tax Contingency [Line Items]
Income Tax Examination, Year under Examination	2,010
Open Tax Year	2,011
Maximum [Member]
Income Tax Contingency [Line Items]
Income Tax Examination, Year under Examination	2,013

Fair Value Measurement by Balan

Fair Value Measurement by Balance Sheet Grouping (Details) - USD ($) $ in Thousands		Mar. 31, 2016	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Restricted investments, held to maturity, amortized cost		$ 23,171	$ 23,215
Long-term debt		647,163	679,177
Accounts receivable securitization		224,017	223,927
Revolving line of credit	[1]	200,000	200,000
Deferred Loan Costs		1,900	1,500
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Restricted investments, held to maturity, amortized cost	[2]	23,171	23,215
Accounts receivable securitization	[3]	224,017	223,927
Revolving line of credit	[4]	200,000	200,000
Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Restricted investments, held to maturity, amortized cost	[2]	23,175	23,190
Accounts receivable securitization	[3]	225,000	225,000
Revolving line of credit	[4]	200,000	200,000
2015 Agreement, New Term Loan A [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred Loan Costs		1,100	1,700
2015 Agreement, New Term Loan A [Member] | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	[5]	638,687	668,055
2015 Agreement, New Term Loan A [Member] | Estimated Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	[5]	639,750	669,750
2015 RSA [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred Loan Costs		$ 1,000	$ 1,100
[1]	(1)The Company had outstanding letters of credit, primarily related to workers' compensation and self-insurance liabilities of $101.0 million and $95.0 million under the New Revolver at March 31, 2016 and December 31, 2015, respectively.
[2]	Restricted investments are included in "Restricted investments, held to maturity, amortized cost."
[3]	(3)Carrying value is net of $1.0 million and $1.1 million DLC as of March 31, 2016 and December 31, 2015, respectively.
[4]	(4)The New Revolver (due July 2020) is included in "Revolving line of credit."
[5]	The New Term Loan A is included in "Current portion of long-term debt" and "Long-term debt, less current portion." Carrying value is net of $1.1 million and $1.7 million DLC as of March 31, 2016 and December 31, 2015, respectively.

Fair Value Measurement Recurrin

Fair Value Measurement Recurring Fair Value Measurement (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Fair Value Disclosures [Abstract]
Assets, Fair Value Disclosure, Recurring	$ 0	$ 0
Liabilities, Fair Value Disclosure, Recurring	$ 0	$ 0

Fair Value Measurement Fair Val

Fair Value Measurement Fair Value Measurement (Assets Measured On a Nonrecurring Basis) (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015	Sep. 19, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	$ 0
Note receivable				$ 2,300,000
Note receivable Total Gains (Losses)	0	$ (1,480,000)
Liabilities, Fair Value Disclosure, Nonrecurring	$ 0		$ 0
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Note receivable			0
Note receivable Total Gains (Losses)		$ (1,500,000)	(1,480,000)
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Note receivable			0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Note receivable			0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Note receivable			$ 0

Summary of Financial Informatio

Summary of Financial Information - Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Segment Reporting Information [Line Items]
Revenues	$ 967,823	$ 1,015,144
Operating Income (Loss)	52,483	75,000
Depreciation, Depletion and Amortization, Nonproduction	66,951	56,927
Truckload [Member]
Segment Reporting Information [Line Items]
Revenues	492,522	538,341
Operating Income (Loss)	36,287	56,854
Depreciation, Depletion and Amortization, Nonproduction	31,283	28,610
Dedicated [Member]
Segment Reporting Information [Line Items]
Revenues	227,914	217,775
Operating Income (Loss)	23,858	14,345
Depreciation, Depletion and Amortization, Nonproduction	16,358	14,273
Swift Refrigerated [Member]
Segment Reporting Information [Line Items]
Revenues	84,685	95,568
Operating Income (Loss)	(332)	4,799
Depreciation, Depletion and Amortization, Nonproduction	4,634	3,294
Intermodal [Member]
Segment Reporting Information [Line Items]
Revenues	82,548	90,354
Operating Income (Loss)	(2,908)	(1,243)
Depreciation, Depletion and Amortization, Nonproduction	3,179	3,252
Subtotal [Member]
Segment Reporting Information [Line Items]
Revenues	887,669	942,038
Operating Income (Loss)	56,905	74,755
Depreciation, Depletion and Amortization, Nonproduction	55,454	49,429
Non-reportable segment [Member]
Segment Reporting Information [Line Items]
Revenues	99,248	91,622
Operating Income (Loss)	(4,422)	245
Depreciation, Depletion and Amortization, Nonproduction	11,497	7,498
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	$ (19,094)	$ (18,516)

Segments and Geography (Narrati

Segments and Geography (Narrative) (Details) - Segment	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Segment Reporting [Abstract]
Number of reportable segments	4
Long lived assets of foreign operations	5.00%		5.00%
Percentage of foreign operations consolidated revenue	5.00%	5.00%