Liberty Energy (LBRT) 10-K 27 Feb 20 2019 FY Annual report Financial data

Cover

Cover - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Feb. 21, 2020	Jun. 28, 2019
Class of Stock [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2019
Document Transition Report	false
Entity File Number	001-38081
Entity Registrant Name	Liberty Oilfield Services Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	81-4891595
Entity Address, Address Line One	950 17th Street
Entity Address, Address Line Two	Suite 2400
Entity Address, City or Town	Denver
Entity Address, State or Province	CO
Entity Address, Postal Zip Code	80202
City Area Code	303
Local Phone Number	515-2800
Title of 12(b) Security	Class A Common Stock, par value $0.01
Trading Symbol	LBRT
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 732.8
Amendment Flag	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Entity Central Index Key	0001694028
Current Fiscal Year End Date	--12-31
Shares of Class A Common Stock
Class of Stock [Line Items]
Entity Common Stock, Shares Outstanding		81,920,347
Shares of Class B Common Stock
Class of Stock [Line Items]
Entity Common Stock, Shares Outstanding		30,638,960

Consolidated and Combined Balan

Consolidated and Combined Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 112,690	$ 103,312
Accounts receivable—trade, net allowances for bad debt of $1,053 and $0, respectively	204,413	153,589
Accounts and notes receivable—related party	9,629	15,139
Unbilled revenue	38,868	79,233
Inventories	88,547	60,024
Prepaid and other current assets	34,827	49,924
Total current assets	488,974	461,221
Property and equipment, net	651,703	627,053
Other assets	34,339	28,227
Finance lease right-of-use assets	55,337	0
Operating lease right-of-use assets	53,076	0
Total assets	1,283,429	1,116,501
Current liabilities:
Accounts payable	117,613	80,490
Accrued liabilities:
Accrued vendor invoices	42,753	67,771
Operational accruals	26,753	36,414
Accrued salaries and benefits	28,805	22,791
Accrued interest and other (including payables to related parties of $1,329 and $0, respectively)	10,643	9,585
Accrued liabilities—related party	0	2,300
Current portion of long-term debt, net of discount of $1,341 and $1,365, respectively	409	385
Current portion of finance lease liabilities	23,646	0
Current portion of operating lease liabilities	15,873	0
Total current liabilities	266,495	219,736
Long-term debt, net of discount of $2,485 and $3,826, respectively, less current portion	105,731	106,139
Deferred tax liability	19,659	32,994
Payable pursuant to tax receivable agreements, including payables to related parties of $23,797 and $2,857, respectively	48,481	16,818
Noncurrent portion of finance lease liabilities	24,884	0
Noncurrent portion of operating lease liabilities	36,687	0
Total liabilities	501,937	375,687
Commitments & contingencies (Note 13)
Stockholders’ equity:
Preferred Stock, $0.01 par value, 10,000 shares authorized and none issued and outstanding	0	0
Common Stock:
Additional paid in capital	410,596	312,659
Retained earnings	143,105	119,274
Total stockholders’ equity	554,827	433,069
Non-controlling interest	226,665	307,745
Total equity	781,492	740,814
Total liabilities and equity	1,283,429	1,116,501
Class A, $0.01 par value, 400,000,000 shares authorized and 81,885,384 issued and outstanding as of December 31, 2019 and 68,359,871 issued and outstanding as of December 31, 2018
Common Stock:
Common stock, par value $0.01	819	684
Class B, $0.01 par value, 400,000,000 shares authorized and 30,638,960 issued and outstanding as of December 31, 2019 and 45,207,372 issued and outstanding as of December 31, 2018
Common Stock:
Common stock, par value $0.01	$ 307	$ 452

Consolidated and Combined Bal_2

Consolidated and Combined Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Allowance for bad debts	$ 1,053	$ 0
Payable to related parties	1,329	0
Current portion of long-term debt, discount	1,341	1,365
Long-term debt, discount	2,485	3,826
Payable pursuant to tax receivable agreements, related parties	$ 23,797	$ 2,857
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	10,000	10,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Shares of Class A Common Stock
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	400,000,000	400,000,000
Common stock, shares issued (in shares)	81,885,384	68,359,871
Common stock, shares outstanding (in shares)	81,885,384	68,359,871
Shares of Class B Common Stock
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	400,000,000	400,000,000
Common stock, shares issued (in shares)	30,638,960	45,207,372
Common stock, shares outstanding (in shares)	30,638,960	45,207,372

Consolidated and Combined State

Consolidated and Combined Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue:
Revenue	$ 1,972,073	$ 2,132,032	$ 1,465,133
Revenue—related parties	18,273	23,104	24,722
Total revenue	1,990,346	2,155,136	1,489,855
Operating costs and expenses:
Cost of services (exclusive of depreciation and amortization shown separately below)	1,621,180	1,628,753	1,147,008
General and administrative	97,589	99,052	80,089
Depreciation and amortization	165,379	125,110	81,473
Loss (gain) on disposal of assets	2,601	(4,342)	148
Total operating costs and expenses	1,886,749	1,848,573	1,308,718
Operating income	103,597	306,563	181,137
Other expense:
Interest Income, Other	(983)	(382)	(53)
Interest expense	17,485	17,527	11,928
Interest (income) expense—related party	(1,821)	0	761
Total interest expense	14,681	17,145	12,636
Net income before income taxes	88,916	289,418	168,501
Income tax expense	14,052	40,385	0
Net income	74,864	249,033	168,501
Less: Net income attributable to Predecessor, prior to Corporate Reorganization	0	8,705	168,501
Less: Net income attributable to non-controlling interests	35,861	113,979	0
Net income attributable to Liberty Oilfield Services Inc. stockholders	$ 39,003	$ 126,349	$ 0
Net income attributable to Liberty Oilfield Services Inc. stockholders per common share:
Basic (in dollars per share)	$ 0.54	$ 1.84
Diluted (in dollars per share)	$ 0.53	$ 1.81
Weighted average common shares outstanding:
Basic (in shares)	72,334	68,838
Diluted (in shares)	105,256	117,838

Consolidated and Combined Sta_2

Consolidated and Combined Statements of Changes in Equity - USD ($) $ in Thousands	Total	Members’ Equity	Additional Paid in Capital	Retained Earnings	Total Stockholders’ equity	Non-controlling Interest	Shares of Class A Common Stock	Shares of Class A Common StockCommon Stock	Shares of Class B Common Stock	Shares of Class B Common StockCommon Stock
Beginning Balance at Dec. 31, 2017		$ 392,766
Beginning balance (in shares) at Dec. 31, 2017								0		0
Beginning balance at Dec. 31, 2017	$ 392,766		$ 0	$ 0	$ 0	$ 0		$ 0		$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Return on redeemable common units	(149)	(149)
Net income prior to Corporate Reorganization	8,705	8,705
Ending Balance at Jan. 17, 2018		401,322
Ending balance (in shares) at Jan. 17, 2018								0		0
Ending balance at Jan. 17, 2018	401,322		0	0	0	0		$ 0		$ 0
Beginning Balance at Dec. 31, 2017		392,766
Beginning balance (in shares) at Dec. 31, 2017								0		0
Beginning balance at Dec. 31, 2017	392,766		0	0	0	0		$ 0		$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income prior to Corporate Reorganization	126,349
Net Income (Loss) Attributable to Predecessor	8,705
Ending Balance at Dec. 31, 2018		0
Ending balance (in shares) at Dec. 31, 2018							68,359,871	68,360,000	45,207,372	45,207,000
Ending balance at Dec. 31, 2018	740,814		312,659	119,274	433,069	307,745		$ 684		$ 452
Beginning Balance at Jan. 17, 2018		401,322
Beginning balance (in shares) at Jan. 17, 2018								0		0
Beginning balance at Jan. 17, 2018	401,322		0	0	0	0		$ 0		$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exchange of Class B Common Stock for Class A Common Stock (in shares)								3,000,000		(3,000,000)
Exchange of Class B Common Stock for Class A Common Stock	0		20,534		20,534	(20,534)		$ 30		$ (30)
Effect of exchange on deferred tax asset, net of liability under tax receivable agreements	2,592		2,592		2,592
$0.20/share of Class A Common Stock dividend	(11,746)			(7,075)	(7,075)	(4,671)
Distributions and advances paid to non-controlling interest unitholders	(21,288)					(21,288)
Share repurchase (in shares)								(4,594,000)
Share repurchases	(82,903)		(62,068)		(62,114)	(20,789)		$ (46)
Stock based compensation expense	5,450		5,450		5,450
Exchange of Liberty LLC Units for Class A Common Stock and Class B Common Stock and extinguishment of redeemable common units	44,544	(401,322)	444,824	0	445,866	0		$ 560		$ 482
Exchange of Liberty LLC Units for Class A Common Stock and Class B Common Stock and extinguishment of Redeemable Common Units (in shares)								55,986,000		48,207,000
Net deferred tax liability due to Corporate Reorganization	(29,287)		(29,287)		(29,287)
Issuance of Class A Common Stock, net of underwriter discount and offering costs (in shares)								14,340,000
Issuance of Class A Common Stock, net of underwriter discount and offering costs	219,990		219,847		219,990			$ 143
Redemption of Legacy Ownership, net of underwriter discount (in shares)								(1,609,000)
Redemption of Legacy Ownership, net of underwriter discount	(25,897)		(25,881)		(25,897)			$ (16)
Issuance of restricted stock (in shares)								1,259,000
Issuance of restricted stock	0		(13)		0			$ 13
Liability due to tax receivable agreements	(2,291)		(2,291)		(2,291)
Initial allocation of non-controlling interest of Liberty LLC effective on the date of the IPO	0		(261,048)		(261,048)	261,048
Restricted stock forfeited (in shares)								(22,000)
Restricted stock forfeited	0				0			$ 0
Net income subsequent to Corporate Reorganization and IPO	240,328			126,349	126,349	113,979
Ending Balance at Dec. 31, 2018		$ 0
Ending balance (in shares) at Dec. 31, 2018							68,359,871	68,360,000	45,207,372	45,207,000
Ending balance at Dec. 31, 2018	740,814		312,659	119,274	433,069	307,745		$ 684		$ 452
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income prior to Corporate Reorganization	39,003
Exchange of Class B Common Stock for Class A Common Stock (in shares)								14,568,000		(14,568,000)
Exchange of Class B Common Stock for Class A Common Stock	0		110,852		110,852	(110,852)		$ 145		$ (145)
Offering Costs	(1,516)		(1,012)		(1,012)	(504)
Effect of exchange on deferred tax asset, net of liability under tax receivable agreements	5,930		5,930		5,930
Deferred tax impact of ownership changes from exchanges and repurchases	(11,130)		(11,130)		(11,130)
$0.20/share of Class A Common Stock dividend	(15,177)			(15,177)	(15,177)
$0.20/unit distributions to non-controlling unitholders	(7,747)					(7,747)
Distributions and advances paid to non-controlling interest unitholders	(6)					(6)
Share repurchase (in shares)								(1,303,000)
Share repurchases	(17,098)		(13,017)		(13,030)	(4,068)		$ (13)
Stock based compensation expense	13,592		6,638		6,638	6,954
Net deferred tax liability due to Corporate Reorganization			(29,300)
Vesting of restricted stock units (in shares)								268,000
Vesting of restricted stock units	(1,039)		(302)		(299)	(740)		$ 3
Restricted stock forfeited (in shares)								(8,000)
Restricted stock forfeited	5		(22)	5	(17)	22		$ 0
Net Income (Loss) Attributable to Predecessor	0
Net income subsequent to Corporate Reorganization and IPO	74,864			39,003	39,003	35,861
Ending balance (in shares) at Dec. 31, 2019							81,885,384	81,885,000	30,638,960	30,639,000
Ending balance at Dec. 31, 2019	$ 781,492		$ 410,596	$ 143,105	$ 554,827	$ 226,665		$ 819		$ 307

Consolidated and Combined Sta_3

Consolidated and Combined Statements of Changes in Equity (Parenthetical)	12 Months Ended
	Dec. 31, 2019$ / shares
Statement of Stockholders' Equity [Abstract]
Common stock dividend (in dollars per share)	$ 0.20
Distribution to noncontrolling unitholders (in dollars per share)	$ 0.20

Consolidated and Combined Sta_4

Consolidated and Combined Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net income (loss)	$ 74,864	$ 249,033	$ 168,501
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	165,379	125,110	81,473
Loss (gain) on disposal of assets	2,601	(4,342)	148
Gain on tax receivable agreements	(122)	0	0
Amortization of debt issuance costs	2,205	4,031	2,311
Inventory write down	1,953	3,389	259
Non-cash lease expense	3,192	0	0
Stock based compensation expense	13,592	5,450	0
Deferred income tax expense	23,408	20,488	0
Bad debt provision	1,053	0	0
Changes in operating assets and liabilities:
Accounts receivable and unbilled revenue	(11,512)	23,074	(133,689)
Accounts receivable and unbilled revenue—related party	5,510	(11,096)	3,460
Inventories	(30,476)	(4,610)	(27,639)
Other assets	(6,464)	(32,771)	(12,611)
Accounts payable and accrued liabilities	22,386	(26,798)	111,352
Accounts payable and accrued liabilities—related party	(1,000)	300	1,544
Payment of operating lease liability	(5,469)	0	0
Net cash provided by operating activities	261,100	351,258	195,109
Cash flows from investing activities:
Capital expenditures	(195,173)	(258,835)	(311,794)
Proceeds from disposal of assets	826	3,343	1,751
Net cash used in investing activities	(194,347)	(255,492)	(310,043)
Cash flows from financing activities:
Cash flows from financing activities:	0	230,174	0
Redemption of LLC Units from Legacy Owners	0	(25,897)	0
Proceeds from borrowings on term loan	0	0	171,500
Repayments of borrowings on term loan	(1,750)	(62,847)	(57,438)
Proceeds from borrowings on line-of-credit	0	0	140,559
Repayments of borrowings on line-of-credit	0	(30,000)	(158,559)
Proceeds from Liberty Oilfield Services Holdings LLC	0	2,115	0
Payments on finance lease and capital lease obligations	(12,143)	0	(119)
Class A Common Stock dividends	(14,776)	(6,907)	0
Per unit distributions to non-controlling interest unitholders	(7,747)	(4,671)	0
Other distributions and advance payments to non-controlling interest unitholders	(6)	(21,288)	0
Tax withholding on restricted stock unit vesting	(1,039)	0	0
Share repurchases	(18,398)	(82,903)	0
Proceeds from related party bridge loans	0	0	60,000
Payments of debt issuance costs	0	(315)	(9,036)
Proceeds from issuance of redeemable common units	0	0	39,794
Payments for redemption of redeemable common units	0	0	(62,739)
Payment of equity offering costs	(1,516)	(6,236)	(4,191)
Net cash (used in) provided by financing activities	(57,375)	(8,775)	119,771
Net increase in cash and cash equivalents	9,378	86,991	4,837
Cash and cash equivalents—beginning of period	103,312	16,321	11,484
Cash and cash equivalents—end of period	112,690	103,312	16,321
Supplemental disclosure of cash flow information:
Cash paid for income taxes	1,042	27,263	0
Cash paid for interest	12,642	13,957	9,766
Non-cash investing and financing activities:
Capital expenditures included in accounts payable and accrued liabilities	32,143	45,703	18,687
Related party bridge loans exchanged for Redeemable Class 2 Common Units	$ 0	$ 0	$ 60,679

Organization and Basis of Prese

Organization and Basis of Presentation	12 Months Ended
	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization, Operations and Basis of Presentation	Organization and Basis of Presentation Organization Liberty Oilfield Services Inc. (the “Company”) was incorporated as a Delaware corporation on December 21, 2016, to become a holding corporation for Liberty Oilfield Services New HoldCo LLC (“Liberty LLC”) and its subsidiaries upon completion of a corporate reorganization (as detailed below, the “Corporate Reorganization”) and planned initial public offering of the Company (“IPO”). The Company has no material assets other than its ownership in Liberty LLC. Prior to the Corporate Reorganization, Liberty Oilfield Services Holdings LLC (“Liberty Holdings”) wholly owned Liberty Oilfield Services LLC (“LOS”) and LOS Acquisition CO I LLC (“ACQI” and, together with LOS, the “Predecessor”), which includes the assets and liabilities of LOS Odessa RE Investments, LLC (“Odessa”) and LOS Cibolo RE Investments, LLC (“Cibolo”). Following the Corporate Reorganization, Liberty LLC wholly owns the Predecessor. Effective March 22, 2018, the assets of ACQI were contributed into LOS and ACQI was dissolved. The Company, together with its subsidiaries, is a multi-basin provider of hydraulic fracturing services and goods, with a focus on deploying the latest technologies in the technically demanding oil and gas reservoirs in which it operates, principally in North Dakota, Colorado, Wyoming and Texas. Corporate Reorganization In connection with the IPO, the Company completed the Corporate Reorganization, including the following series of transactions: • Liberty Holdings contributed all of its assets to Liberty LLC in exchange for Liberty LLC Units (as defined below); • Liberty Holdings liquidated and distributed to its then-existing owners (the “Legacy Owners”) Liberty LLC Units pursuant to the terms of the limited liability company agreement of Liberty Holdings and the Master Reorganization Agreement dated as of January 11, 2018, by and among the Company, Liberty Holdings, Liberty LLC, and the other parties named therein (the “Master Reorganization Agreement”); • Certain of the Legacy Owners directly or indirectly contributed all or a portion of their Liberty LLC Units to the Company in exchange for 55,685,027 shares of our Class A common stock, par value $0.01 per share (the “Class A Common Stock”), and 1,258,514 restricted shares of Class A Common Stock. Subsequent to the initial exchange, 1,609,122 shares of Class A Common Stock were redeemed for an aggregate price of $25.9 million, upon the exercise of the underwriters’ overallotment option; • the Company issued, at par, the Legacy Owners that continued to own Liberty LLC Units (the “Liberty Unit Holders”) an aggregate amount of 48,207,372 shares of our Class B common stock, par value $0.01 per share (the “Class B Common Stock”); and • the Company contributed the net proceeds it received from the IPO to Liberty LLC in exchange for additional Liberty LLC Units such that the Company held a total number of Liberty LLC Units equal to the number of shares of Class A Common Stock outstanding immediately following the IPO. Initial Public Offering On January 17, 2018, the Company completed its IPO of 14,640,755 shares of Class A Common Stock at a public offering price of $17.00 per share, of which 14,340,214 shares were offered by the Company and 300,541 were offered by the selling shareholder. The Company received $220.0 million net proceeds from the IPO, after deducting approximately $13.4 million in underwriting discounts and commissions and $10.4 million in other offering costs. The Company did not receive any proceeds from the sale of the shares of Class A Common Stock by the selling shareholder. The Company used $25.9 million of net proceeds to redeem ownership interests in Liberty LLC from the Legacy Owners. The Company contributed the remaining net proceeds to Liberty LLC in exchange for units in Liberty LLC (the “Liberty LLC Units”). Liberty LLC used a portion of these net proceeds (i) to repay outstanding borrowings and accrued interest under the Predecessor’s ABL Facility (as defined herein), totaling approximately $30.1 million, (ii) to repay 35% of the Predecessor’s outstanding borrowings, accrued interest and prepayment premium under the Term Loan Facility (as defined herein), totaling approximately $62.5 million and (iii) for general corporate purposes, including repayment of additional indebtedness and funding capital expenditures. As of December 31, 2019 and 2018, the Company owned 72.8%, and 60.2% of Liberty LLC, respectively. Basis of Presentation The accompanying consolidated and combined financial statements were prepared using generally accepted accounting principles in the United States of America (“GAAP”) and the instructions to Form 10-K, Regulation S-X and the rules and regulations of the Securities and Exchange Commission. The accompanying consolidated and combined financial statements and related notes present the consolidated financial position, results of operations, cash flows, and equity of the Company as of and for the years ended December 31, 2019 and 2018, and the combined results of operations and cash flows of the Predecessor for the year ended December 31, 2017. All intercompany amounts have been eliminated in the presentation of the consolidated financial statements of the Company and the combined financial statements of the Predecessor. Comprehensive income is not reported due to the absence of items of other comprehensive income or loss during the periods presented. The consolidated and combined financial statements include financial data at historical cost as the contribution of assets is considered to be a reorganization of entities under common control. The consolidated and combined financial statements may not be indicative of the actual level of assets, liabilities and costs that would have been incurred by the Predecessor if it had operated as an independent, publicly-traded company during the periods prior to the IPO or of the costs expected to be incurred in the future. The consolidated and combined financial statements for periods prior to January 17, 2018, reflect the historical results of the Predecessor. The consolidated financial statements include the amounts of the Company and all majority owned subsidiaries where the Company has the ability to exercise control. The Company’s operations are organized into a single reportable segment, which consists of hydraulic fracturing services and goods.

Significant Accounting Policies

Significant Accounting Policies	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Significant Accounting Policies	Significant Accounting Policies Use of Estimates The preparation of consolidated and combined financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the consolidated and combined financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The consolidated and combined financial statements include certain amounts that are based on management’s best estimates and judgments. The most significant estimates relate to the collectibility of accounts receivable and estimates of allowance for doubtful accounts, the useful lives and salvage values of long-lived assets, future cash flows associated with long-lived assets, net realizable value of inventory, and equity unit valuation. These estimates may be adjusted as more current information becomes available. Cash and Cash Equivalents The Company considers all highly liquid instruments purchased with an original maturity of three months or less to be cash equivalents. The Company continually monitors its positions with, and the credit quality of, the financial institutions with which it has banking relationships. As of the balance sheet date, and periodically throughout the year, the Company has maintained balances in various operating accounts in excess of federally insured limits. Accounts Receivable The Company analyzes the need for an allowance for doubtful accounts for estimated losses related to potentially uncollectible accounts receivable on a case-by-case basis throughout the year. In establishing the required allowance, management considers historical losses adjusted to take into account current market conditions and the customers’ financial condition, the amount of receivables, the current receivables aging and current payment patterns. The Company reserves amounts based on specific identification. Account balances are charged to the allowance after all means of collection have been exhausted and the potential for recovery is considered remote. It is reasonably possible that the Company’s estimate of the allowance for doubtful accounts will change and that losses ultimately incurred could differ materially from the amounts estimated in determining the allowance. Inventories Inventories consist of raw materials used in the hydraulic fracturing process, such as proppants, chemicals, and field service equipment maintenance parts and are stated at the lower of cost, determined using the weighted average cost method, or net realizable value. Inventories are charged to cost of services as used when providing hydraulic fracturing services. Net realizable value is the estimated selling prices in the ordinary course of business, less reasonably predictable cost of completion, disposal, and transportation. Property and Equipment Property and equipment are stated at cost. Depreciation and amortization expense is recognized on property and equipment, excluding land, utilizing the straight-line method over the estimated useful lives, ranging from two Construction in-progress, a component of property and equipment, represents long-lived assets being developed by the Company. These assets are not subject to depreciation until they are completed and ready for their intended use, at which point the Company reclassifies them to field services equipment or vehicles, as appropriate. The Company assesses its long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability is assessed using undiscounted future net cash flows of assets grouped at the lowest level for which there are identifiable cash flows independent of the cash flows of other groups of assets. The Company determined the lowest level of identifiable cash flows to be at the asset group, which is the aggregate of the Company’s hydraulic fracturing fleets that are in service. A long-lived asset is not recoverable if its carrying amount exceeds the sum of estimated undiscounted cash flows expected to result from the use and eventual disposition. When alternative courses of action to recover the carrying amount of the asset group are under consideration, estimates of future undiscounted cash flows take into account possible outcomes and probabilities of their occurrence. If the carrying amount of the asset is not recoverable, an impairment loss is recognized in an amount by which its carrying amount exceeds its estimated fair value, such that its carrying amount is adjusted to its estimated fair value, with an offsetting charge to impairment expense. The Company measures the fair value of its property and equipment using the discounted cash flow method. The expected future cash flows used for impairment reviews and related fair value calculations are based on judgmental assessments of projected revenue growth, fleet count, utilization, gross margin rates, selling, general and administrative rates, working capital fluctuations, capital expenditures, discount rates and terminal growth rates. During 2019, 2018 and 2017, the Company did not test its long-lived assets for recoverability as there were no triggering events. No impairment was recognized during the years ended December 31, 2019, 2018 and 2017 . Major Maintenance Activities The Company incurs maintenance costs on its major equipment. The determination of whether an expenditure should be capitalized or expensed requires management judgment in the application of how the costs incurred benefit future periods, relative to the Company’s capitalization policy. Costs that either establish or increase the efficiency, productivity, functionality or life of a fixed asset are capitalized and depreciated over the remaining useful life of the asset. Leases On January 1, 2019, the Company adopted Accounting Standards Update (“ASU”) No. 2016-02, Leases (Accounting Standard Codification (“ASC”) Topic 842), as amended by other ASUs issued since February 2016 (“ASU 2016-02” or “ASC Topic 842”), using the modified retrospective transition method applied at the effective date of the standard. By electing this optional transition method, information prior to January 1, 2019 has not been restated and continues to be reported under the accounting standards in effect for the period (ASC Topic 840). The Company elected the package of practical expedients permitted under the transition guidance within the new standard, including the option to carry forward the historical lease classifications and assessment of initial direct costs. The Company also elected to account for lease and non-lease components as a single component, and to not include leases with an initial term of less than 12 months in the lease assets and liabilities. The adoption of ASC Topic 842 resulted in the recognition of finance lease right-of-use assets, operating lease right-of-use assets, and lease liabilities for finance and operating leases. As of January 1, 2019, the adoption of the new standard resulted in the recognition of finance lease assets of $57.2 million, including $2.1 million and $2.0 million reclassified from prepaid and other current assets and other assets, respectively, and finance lease liabilities of $53.2 million. Additionally, the Company recorded operating lease assets of $64.0 million, including $1.9 million reclassified from prepaid and other current assets, and operating lease liabilities of $63.6 million, including $1.5 million reclassified from accrued interest and other liabilities as of January 1, 2019. There was no significant impact to the consolidated statements of income, equity or cash flows. For leases entered into after January 1, 2019, the Company determines if an arrangement is a lease at inception and evaluates identified leases for operating or finance lease treatment. Operating or finance lease right-of-use assets and liabilities are recognized at the commencement date based on the present value of lease payments over the lease term. The Company uses the rate implicit in the lease, when available, or an estimated fully collateralized incremental borrowing rate corresponding with the lease term and the information available at the commencement date in determining the present value of lease payments. Lease terms may include options to renew, however, the Company typically cannot determine its intent to renew a lease with reasonable certainty at inception. Deferred Financing Costs Costs associated with obtaining debt financing are deferred and amortized to interest expense using the effective interest method. In accordance with ASU No. 2015-03 and 2015-15, for all periods the Company has reflected deferred financing costs related to term loan debt as a direct deduction from the carrying amount, and costs associated with line-of-credit arrangements as other assets. Income Taxes Following the IPO, the Company is a corporation and is subject to U.S. federal, state and local income tax on its share of Liberty LLC’s taxable income. As a result of the IPO and Corporate Reorganization, the Company recorded deferred tax assets and liabilities for the difference between the book value of assets and liabilities for financial reporting purposes and those amounts applicable for income tax purposes. Deferred income taxes are computed using the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the consolidated financial statements. Deferred tax assets and liabilities are calculated using the enacted tax rates in effect for the year in which the deferred tax asset or liability is expected to reverse. The Company classifies all deferred tax assets and liabilities as non-current. The Company recognizes the financial statement effects of a tax position when it is more-likely-than-not, based on the technical merits, that the position will be sustained upon examination. A tax position that meets the more-likely-than-not recognition threshold is measured as the largest amount of tax benefit that is greater than 50% likely of being realized upon ultimate settlement with a taxing authority. Previously recognized tax positions are reversed in the first period in which it is no longer more-likely-than-not that the tax position would be sustained upon examination. Income tax related interest and penalties, if applicable, are recorded as a component of the provision for income tax expense. Tax Receivable Agreements In connection with the IPO, on January 17, 2018, the Company entered into two Tax Receivable Agreements (the “TRAs”) with the R/C Energy IV Direct Partnership, L.P. and the Legacy Owners that continued to own Liberty LLC Units (each such person and any permitted transferee, a “Tax Receivable Agreement Holder” and together, the “Tax Receivable Agreement Holders”). The TRAs generally provide for the payment by the Company of 85% of the net cash savings, if any, in U.S. federal, state, and local income tax and franchise tax (computed using simplifying assumptions to address the impact of state and local taxes) that the Company actually realizes (or is deemed to realize in certain circumstances) in periods after the IPO as a result, as applicable to each Tax Receivable Agreement Holder, of (i) certain increases in tax basis that occur as a result of the Company’s acquisition (or deemed acquisition for U.S. federal income tax purposes) of all or a portion of such Tax Receivable Agreement Holder’s Liberty LLC Units in connection with the IPO or pursuant to the exercise of the right (the “Redemption Right”) or the Company’s right (the “Call Right”), (ii) any net operating losses available to the Company as a result of the Corporate Reorganization, and (iii) imputed interest deemed to be paid by the Company as a result of, and additional tax basis arising from, any payments the Company makes under the TRAs. With respect to obligations the Company expects to incur under the TRAs (except in cases where the Company elects to terminate the TRAs early, the TRAs are terminated early due to certain mergers, asset sales, or other changes of control or the Company has available cash but fails to make payments when due), generally the Company may elect to defer payments due under the TRAs if the Company does not have available cash to satisfy its payment obligations under the TRAs or if its contractual obligations limit its ability to make such payments. Any such deferred payments under the TRAs generally will accrue interest. In certain cases, payments under the TRAs may be accelerated and/or significantly exceed the actual benefits, if any, the Company realizes in respect of the tax attributes subject to the TRAs. The Company accounts for amounts payable under the TRAs in accordance with ASC Topic 450, Contingencies . If the Company experiences a change of control (as defined under the TRAs) or the TRAs otherwise terminate early, the Company’s obligations under the TRAs could have a substantial negative impact on its liquidity and could have the effect of delaying, deferring or preventing certain mergers, asset sales, or other forms of business combinations or changes of control. Share Repurchases The Company accounts for the purchase price of repurchased Class A Common Stock in excess of par value ($0.01 per share of Class A Common Stock) as a reduction of additional paid-in capital, and will continue to do so until additional paid-in capital is reduced to zero. Thereafter, any excess purchase price will be recorded as a reduction to retained earnings. Revenue Recognition Effective January 1, 2018, the Company adopted a comprehensive new revenue recognition standard, ASC Topic 606- Revenue from Contracts with Customers . The details of the significant changes to accounting policies resulting from the adoption of the new standard are set out below. The Company adopted the standard using a modified retrospective method; accordingly, the comparative information for the year ended December 31, 2017 has not been adjusted and continues to be reported under the previous revenue standard. The adoption of this standard did not have a material impact to the consolidated financial position, reported revenue, results of operations or cash flows as of and for the year ended December 31, 2018. Under the new standard, revenue recognition is based on the transfer of control, or the customer’s ability to benefit from the services and products in an amount that reflects the consideration expected to be received in exchange for those services and products. In recognizing revenue for services and products, the transaction price is determined from sales orders or contracts with customers. Revenue is recognized at the completion of each fracturing stage, and in most cases the price at the end of each stage is fixed, however, in limited circumstances contracts may contain variable consideration. Variable consideration typically may relate to discounts, price concessions and incentives. We estimate variable consideration based on the amount of consideration we expect to receive. The Company accrues revenue on an ongoing basis to reflect updated information for variable consideration as performance obligations are met. The Company also assesses customers’ ability and intention to pay, which is based on a variety of factors including historical payment experience and financial condition. Payment terms and conditions vary by contract type, although terms generally include a requirement of payment within 30 to 45 days. In connection with the adoption of ASC Topic 842, the Company determined that certain of its service revenue contracts contain a lease component. The Company elected to adopt a practical expedient available to lessors, which allows the Company to combine the lease and non-lease components and account for the combined component in accordance with the accounting treatment for the predominant component. Therefore, the Company combines the lease and service component for certain of the Company’s service contracts and continues to account for the combined component under ASC Topic 606, Revenue from Contracts with Customers. Deferred Revenue From time to time, the Company may require partial payment in advance from new customers to secure credit or from existing customers in order to secure additional hydraulic fracturing services. Initially, such payments are recorded in the accompanying consolidated and combined financial statements as deferred revenue, and upon performance of the agreed services, the Company recognizes revenue consistent with its revenue recognition policy described above. As of December 31, 2019 and December 31, 2018, the Company had no amounts recorded as deferred revenue. During the year ended December 31, 2018, the Company recognized to revenue $9.2 million of customer prepayments initially recorded as deferred revenue. Fleet Start-up Costs The Company incurs start-up costs to commission a new fleet or district. These costs include hiring and training of personnel, and acquisition of consumable parts and tools. Start-up costs are expensed as incurred, and are reflected in general and administrative expense in the consolidated and combined statement of operations. Start-up costs for the years ended December 31, 2019, 2018 and 2017, were $4.5 million, $10.1 million and $14.0 million, respectively. Start-up costs incurred during the years ended December 31, 2019, 2018 and 2017 related to the establishment of one, three, and nine new fleets, respectively. The terms and conditions of the Credit Facilities between the Company and its lenders provides for the add-back of costs or expenses incurred in connection with the acquisition, deployment and opening of any new hydraulic fracturing fleet or district in the computation of certain financial covenants. (See Note 6—Debt). Reclassifications Certain amounts in the prior period financial statements have been reclassified to conform to the presentation of the current period financial statements. These reclassifications had no effect on the previously reported net income. Recently Adopted Accounting Standards On January 1, 2019, the Company adopted ASC Topic 842 using the modified retrospective transition method applied at the effective date of the standard. By electing the modified retrospective transition method, information prior to January 1, 2019 has not been restated and continues to be reported under the accounting standards in effect for the period (Topic 840). The adoption of this standard impacted the consolidated statements of financial position by requiring the recognition of a right-of-use asset and a lease liability; however, the adoption of this standard did not have a significant impact on the consolidated statements of operations or cash flows. See Significant Accounting Policies - Leases for additional information regarding this accounting policy. Recently Issued Accounting Standards In June 2016, the Financial Accounting Standards Board (“FASB”) issued ASU 2016-13, “ Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments

Inventories

Inventories	12 Months Ended
	Dec. 31, 2019
Inventory Disclosure [Abstract]
Inventories	Inventories Inventories consist of the following: December 31, ($ in thousands) 2019 2018 Proppants $ 14,013 $ 22,038 Chemicals 10,076 10,781 Maintenance parts 64,458 27,205 $ 88,547 $ 60,024

Property and Equipment

Property and Equipment	12 Months Ended
	Dec. 31, 2019
Property, Plant and Equipment [Abstract]
Property and Equipment	Property and Equipment Property and equipment consist of the following: Estimated December 31, 2019 2018 ($ in thousands) Land N/A $ 5,400 $ 5,400 Field services equipment 2-7 978,418 778,423 Vehicles 4-7 60,290 59,807 Buildings and facilities 5-30 29,930 27,795 Office equipment and furniture 2-7 6,623 6,200 1,080,661 877,625 Less accumulated depreciation and amortization (455,687) (307,277) 624,974 570,348 Construction in-progress N/A 26,729 56,705 $ 651,703 $ 627,053 During the years ended December 31, 2019, 2018 and 2017, the Company recognized depreciation expense of $153.6 million, $124.9 million and $81.5 million respectively. In November 2018, one of the Company’s hydraulic frac fleets was involved in an accidental fire, which resulted in damage to a portion of the equipment in that fleet. The Company accrued $15.7 million of insurance proceeds for replacement cost of the damaged equipment, which is presented in prepaid and other current assets on the accompanying consolidated balance sheets as of December 31, 2018. The accrued insurance proceeds offset the $4.3 million loss recognized on the damaged equipment. The resulting net gain of $11.5 million was recognized in (gain) loss on disposal of assets for the year ended December 31, 2018.

Leases

Leases	12 Months Ended
	Dec. 31, 2019
Leases [Abstract]
Leases	Leases The Company has operating and finance leases primarily for vehicles, equipment, railcars, office space, and facilities. The terms and conditions for these leases vary by the type of underlying asset. Certain leases include variable lease payments for items such as property taxes, insurance, maintenance, and other operating expenses associated with leased assets. Payments that vary based on an index or rate are included in the measurement of lease assets and liabilities at the rate as of the commencement date. All other variable lease payments are excluded from the measurement of lease assets and liabilities, and are recognized in the period in which the obligation for those payments is incurred. The components of lease expense as of December 31, 2019 were as follows: ($ in thousands) December 31, 2019 Finance lease cost: Amortization of right-of-use assets $ 10,256 Interest on lease liabilities 2,652 Operating lease cost 20,731 Variable lease cost 3,118 Total lease cost $ 36,757 In accordance with prior guidance, ASC 840, Leases , total rent expense was $40.9 million and $20.8 million for the years ended December, 31, 2018 and 2017, respectively. Supplemental cash flow and other information related to leases as of December 31, 2019 were as follows: ($ in thousands) December 31, 2019 Cash paid for amounts included in measurement of liabilities: Operating leases $ 20,849 Finance leases 14,795 Right-of-use assets upon adoption of ASC 842 and obtained in exchange for new lease liabilities: Operating leases 70,611 Finance leases 65,333 Lease terms and discount rates as of December 31, 2019 were as follows: December 31, 2019 Weighted-average remaining lease term: Operating leases 6.4 years Finance leases 1.3 years Weighted-average discount rate: Operating leases 5.4 % Finance leases 5.2 % Future minimum lease commitments as of December 31, 2019 are as follows: ($ in thousands) Finance Operating 2020 $ 26,407 $ 18,262 2021 20,626 13,696 2022 4,135 7,249 2023 — 4,365 2024 — 3,646 Thereafter — 16,017 Total lease payments 51,168 63,235 Less imputed interest (2,638) (10,675) Total $ 48,530 $ 52,560 The Company’s vehicle leases typically include a residual value guarantee. For the Company’s vehicle leases classified as operating leases, the total residual value guaranteed as of December 31, 2019 is $2.9 million; the payment is not probable and therefore has not been included in the measurement of the lease liability and right-of-use asset. For vehicle leases that are classified as finance leases, the Company includes the residual value guarantee, estimated in the lease agreement, in the financing lease liability. In accordance with the prior guidance, ASC 840, Leases , the future minimum lease payments as determined prior to the adoption of ASC 842, Leases , for the fiscal year ended December 31, 2018, were as follows: ($ in thousands) 2019 $ 42,717 2020 48,685 2021 32,390 2022 6,093 2023 4,303 Thereafter 19,742 $ 153,930
Leases	Leases The Company has operating and finance leases primarily for vehicles, equipment, railcars, office space, and facilities. The terms and conditions for these leases vary by the type of underlying asset. Certain leases include variable lease payments for items such as property taxes, insurance, maintenance, and other operating expenses associated with leased assets. Payments that vary based on an index or rate are included in the measurement of lease assets and liabilities at the rate as of the commencement date. All other variable lease payments are excluded from the measurement of lease assets and liabilities, and are recognized in the period in which the obligation for those payments is incurred. The components of lease expense as of December 31, 2019 were as follows: ($ in thousands) December 31, 2019 Finance lease cost: Amortization of right-of-use assets $ 10,256 Interest on lease liabilities 2,652 Operating lease cost 20,731 Variable lease cost 3,118 Total lease cost $ 36,757 In accordance with prior guidance, ASC 840, Leases , total rent expense was $40.9 million and $20.8 million for the years ended December, 31, 2018 and 2017, respectively. Supplemental cash flow and other information related to leases as of December 31, 2019 were as follows: ($ in thousands) December 31, 2019 Cash paid for amounts included in measurement of liabilities: Operating leases $ 20,849 Finance leases 14,795 Right-of-use assets upon adoption of ASC 842 and obtained in exchange for new lease liabilities: Operating leases 70,611 Finance leases 65,333 Lease terms and discount rates as of December 31, 2019 were as follows: December 31, 2019 Weighted-average remaining lease term: Operating leases 6.4 years Finance leases 1.3 years Weighted-average discount rate: Operating leases 5.4 % Finance leases 5.2 % Future minimum lease commitments as of December 31, 2019 are as follows: ($ in thousands) Finance Operating 2020 $ 26,407 $ 18,262 2021 20,626 13,696 2022 4,135 7,249 2023 — 4,365 2024 — 3,646 Thereafter — 16,017 Total lease payments 51,168 63,235 Less imputed interest (2,638) (10,675) Total $ 48,530 $ 52,560 The Company’s vehicle leases typically include a residual value guarantee. For the Company’s vehicle leases classified as operating leases, the total residual value guaranteed as of December 31, 2019 is $2.9 million; the payment is not probable and therefore has not been included in the measurement of the lease liability and right-of-use asset. For vehicle leases that are classified as finance leases, the Company includes the residual value guarantee, estimated in the lease agreement, in the financing lease liability. In accordance with the prior guidance, ASC 840, Leases , the future minimum lease payments as determined prior to the adoption of ASC 842, Leases , for the fiscal year ended December 31, 2018, were as follows: ($ in thousands) 2019 $ 42,717 2020 48,685 2021 32,390 2022 6,093 2023 4,303 Thereafter 19,742 $ 153,930

Debt

Debt	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Debt	Debt Debt consists of the following: December 31, 2019 2018 Term Loan Outstanding $ 109,966 $ 111,715 Revolving Line of Credit — — Deferred financing costs and original issue discount (3,826) (5,191) Total debt, net of deferred financing costs and original issue discount $ 106,140 $ 106,524 Current portion of long-term debt, net of discount $ 409 $ 385 Long-term debt, net of discount and current portion 105,731 106,139 $ 106,140 $ 106,524 On September 19, 2017, the Company entered into two new credit agreements for a revolving line of credit up to $250.0 million (the “ABL Facility”) and a $175.0 million term loan (the “Term Loan Facility”, and together with the ABL Facility the “Credit Facilities”). ABL Facility Under the terms of the ABL Facility, up to $250.0 million may be borrowed, subject to certain borrowing base limitations based on a percentage of eligible accounts receivable and inventory. As of December 31, 2019, the borrowing base was calculated to be $171.1 million, and the Company had no borrowings outstanding, except for a letter of credit in the amount of $0.3 million, with $170.8 million of remaining availability. Borrowings under the ABL Facility bear interest at LIBOR or a base rate, plus an applicable LIBOR margin of 1.5% to 2.0% or base rate margin of 0.5% to 1.0%, as defined in the ABL Facility credit agreement. The unused commitment is subject to an unused commitment fee of 0.375% to 0.5%. Interest and fees are payable in arrears at the end of each month, or, in the case of LIBOR loans, at the end of each interest period. The ABL Facility matures on the earlier of (i) September 19, 2022, and (ii) to the extent the debt under the Term Loan Facility remains outstanding, 90 days prior to the final maturity of the Term Loan Facility, which matures on September 19, 2022. Borrowings under the ABL Facility are collateralized by accounts receivable and inventory, and further secured by the Company, Liberty LLC and R/C IV Non-U.S. LOS Corp., a Delaware corporation and a subsidiary of the Company, as parent guarantors. Term Loan Facility The Term Loan Facility provides for a $175.0 million term loan, of which $110.0 million remained outstanding as of December 31, 2019. Amounts outstanding bear interest at LIBOR or a base rate, plus an applicable margin of 7.625% or 6.625%, respectively, and the weighted average rate on borrowings was 9.4% as of December 31, 2019. The Company is required to make quarterly principal payments of 1% per annum of the outstanding principal balance, commencing on December 31, 2017, with final payment due at maturity on September 19, 2022. The Term Loan Facility is collateralized by the fixed assets of LOS and its subsidiaries, and is further secured by the Company, Liberty LLC and R/C IV Non-U.S. LOS Corp., a Delaware corporation and a subsidiary of the Company, as parent guarantors. The Credit Facilities include certain non-financial covenants, including but not limited to restrictions on incurring additional debt and certain distributions. Moreover, the ability of the Company to incur additional debt and to make distributions is dependent on maintaining a maximum leverage ratio. The Term Loan Facility requires mandatory prepayments upon certain dispositions of property or issuance of other indebtedness, as defined, and annually a percentage of excess cash flow (25% to 50%, depending on leverage ratio, of consolidated net income less capital expenditures and other permitted payments, commencing with the year ending December 31, 2018). Certain mandatory prepayments and optional prepayments are subject to a prepayment premium of 3% of the prepaid principal declining annually to 1% during the first three years of the term of the Term Loan Facility. The Credit Facilities are not subject to financial covenants unless liquidity, as defined in the respective credit agreements, drops below a specified level. Under the ABL Facility, the Company is required to maintain a minimum fixed charge coverage ratio, as defined in the credit agreement governing the ABL Facility, of 1.0 to 1.0 for each period if excess availability is less than 10% of the borrowing base or $12.5 million, whichever is greater. Under the Term Loan Facility, the Company is required to maintain a minimum fixed charge coverage ratio, as defined, of 1.2 to 1.0 for each trailing twelve-month report if the Company’s liquidity, as defined, is less than $25.0 million for at least five consecutive business days. The Company was in compliance with these covenants as of December 31, 2019. Maturities of debt are as follows: ($ in thousands) Years Ending December 31, 2020 $ 1,750 2021 1,750 2022 106,466 2023 — 2024 — $ 109,966

Fair Value Measurements and Fin

Fair Value Measurements and Financial Instruments	12 Months Ended
	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements and Financial Instruments	Fair Value Measurements and Financial Instruments The fair values of the Company’s assets and liabilities represent the amounts that would be received to sell those assets or that would be paid to transfer those liabilities in an orderly transaction at the reporting date. These fair value measurements maximize the use of observable inputs. However, in situations where there is little, if any, market activity for the asset or liability at the measurement date, the fair value measurement reflects the Company’s own judgments about the assumptions that market participants would use in pricing the asset or liability. The Company discloses the fair values of its assets and liabilities according to the quality of valuation inputs under the following hierarchy: • Level 1 Inputs: Quoted prices (unadjusted) in an active market for identical assets or liabilities. • Level 2 Inputs: Inputs other than quoted prices that are directly or indirectly observable. • Level 3 Inputs: Unobservable inputs that are significant to the fair value of assets or liabilities. The classification of an asset or liability is based on the lowest level of input significant to its fair value. Those that are initially classified as Level 3 are subsequently reported as Level 2 when the fair value derived from unobservable inputs is inconsequential to the overall fair value, or if corroborated market data becomes available. Assets and liabilities that are initially reported as Level 2 are subsequently reported as Level 3 if corroborated market data is no longer available. Transfers occur at the end of the reporting period. There were no transfers into or out of Levels 1, 2 and 3 during the years ended December 31, 2019 and 2018. The Company’s financial instruments consist of cash and cash equivalents, accounts receivable, notes receivable, accounts payable, accrued liabilities, long-term debt, and finance and operating lease obligations. These financial instruments do not require disclosure by level. The carrying values of all the Company’s financial instruments included in the accompanying balance sheets approximated or equaled their fair values at December 31, 2019 and 2018. • The carrying values of cash and cash equivalents, accounts receivable and accounts payable (including accrued liabilities) approximated fair value at December 31, 2019 and 2018, due to their short-term nature. • The carrying value of amounts outstanding under long-term debt agreements with variable rates approximated fair value at December 31, 2019 and 2018, as the effective interest rates approximated market rates. Nonrecurring Measurements Certain assets are measured at fair value on a nonrecurring basis. These assets are not measured at fair value on an ongoing basis but are subject to fair value adjustments in certain circumstances. These assets consist of notes receivable—related party from the Affiliate, as defined and described in Note 12—Related Party Transactions. The note was initially recorded for the trade receivables, created in the normal course of business, due from the Affiliate as of the Agreement Date, as defined in Note 12—Related Party Transactions. There were no identified events or changes in circumstances that had a significant adverse effect on the fair value of the notes receivable. These notes are classified as Level 3 in the fair value hierarchy as the inputs to the determination of fair value are based upon unobservable inputs. As of December 31, 2019 and December 31, 2018, notes receivable—related party from the Affiliate totaled $2.5 million and $0, respectively. Recurring Measurements The fair values of the Company’s cash equivalents measured on a recurring basis pursuant to ASC 820-10 Fair Value Measurements and Disclosures are carried at estimated fair value. Cash equivalents consist of money market accounts which the Company has classified as Level 1 given the active market for these accounts. As of December 31, 2019 and 2018, the Company had cash equivalents, measured at fair value, of $86.9 million and $0, respectively. Nonfinancial assets The Company estimates fair value to perform impairment tests as required on long-lived assets. The inputs used to determine such fair value are primarily based upon internally developed cash flow models and would generally be classified within Level 3 in the event that such assets were required to be measured and recorded at fair value within the consolidated and combined financial statements. There were no such measurements required as of December 31, 2019 and 2018. Credit Risk The Company’s financial instruments exposed to concentrations of credit risk consist primarily of cash and cash equivalents, and trade receivables. The Company’s cash and cash equivalents balance on deposit with financial institutions total $112.7 million and $103.3 million as of December 31, 2019 and 2018, respectively, which, as of certain dates, exceeded FDIC insured limits. The Company regularly monitors these institutions’ financial condition. The majority of the Company’s customers have payment terms of 45 days or less. As of December 31, 2019 and 2018, customer A accounted for 12% and customers A and B accounted for 28% of total accounts receivable and unbilled revenue, respectively. The Company mitigates the associated credit risk by performing credit evaluations and monitoring the payment patterns of its customers. For the year ended December 31, 2019, no customers accounted for more than 10% of total revenue. For the years ended December 31, 2018 and 2017, customer B accounted for 11% and customers C and D accounted for 36% of total revenue, respectively. As of December 31, 2019, the Company recorded a provision for doubtful accounts related to one specific entity engaged in the business of oil and gas exploration and production that has filed for bankruptcy. As of December 31, 2018, the Company had no provision for doubtful accounts, and the balance as of December 31, 2017 represented the bankruptcy of one specific entity. ($ in thousands) 2019 2018 2017 Allowance for doubtful accounts, beginning of year $ — $ — $ 497 Bad debt expense: Provision for doubtful accounts 1,053 — — Write off of uncollectible accounts against reserve — — (497) Allowance for doubtful accounts, end of year $ 1,053 $ — $ —

Equity

Equity	12 Months Ended
	Dec. 31, 2019
Equity [Abstract]
Equity	Equity Preferred Stock As of December 31, 2019 and 2018 the Company had 10,000 shares of preferred stock authorized, par value $0.01, with none issued and outstanding. If issued, each class or series of preferred stock will cover the number of shares and will have the powers, preferences, rights, qualifications, limitations and restrictions determined by the Company's board of directors, which may include, among others, dividend rights, liquidation preferences, voting rights, conversion rights, preemptive rights and redemption rights. Except as provided by law or in a preferred stock designation, the holders of preferred stock will not be entitled to vote at or receive notice of any meeting of shareholders. Class A Common Stock The Company had a total of 81,885,384 shares of Class A Common Stock outstanding as of December 31, 2019, which includes 268,205 shares of restricted stock. As of December 31, 2018, the Company had a total of 68,359,871 shares of Class A Common Stock outstanding, which included 634,653 shares of restricted stock. Holders of Class A Common Stock are entitled to one vote per share on all matters to be voted upon by the stockholders and are entitled to ratably receive dividends when and if declared by the Company’s board of directors. Class B Common Stock The Company had a total of 30,638,960 and 45,207,372 shares of Class B Common Stock outstanding as of December 31, 2019 and 2018, respectively. Holders of the Class B Common Stock are entitled to one vote per share on all matters to be voted upon by stockholders. Holders of Class A Common Stock and Class B Common Stock vote together as a single class on all matters presented to the Company’s stockholders for their vote or approval, except with respect to amendment of certain provisions of the Company’s certificate of incorporation that would alter or change the powers, preferences or special rights of the Class B Common Stock so as to affect them adversely, which amendments must be by a majority of the votes entitled to be cast by the holders of the shares affected by the amendment, voting as a separate class, or as otherwise required by applicable law. Holders of Class B Common Stock do not have any right to receive dividends, unless the dividend consists of shares of Class B Common Stock or of rights, options, warrants or other securities convertible or exercisable into or exchangeable for shares of Class B Common Stock paid proportionally with respect to each outstanding share of Class B Common Stock and a dividend consisting of shares of Class A Common Stock or of rights, options, warrants or other securities convertible or exercisable into or exchangeable for shares of Class A Common Stock on the same terms is simultaneously paid to the holders of Class A Common Stock. Holders of Class B Common Stock do not have any right to receive a distribution upon liquidation or winding up of the Company. Under the Second Amended and Restated Limited Liability Company Agreement of Liberty LLC (the “Liberty LLC Agreement”), each Liberty Unit Holder has, subject to certain limitations, the Redemption Right, which allows it to cause Liberty LLC to acquire all or a portion of its Liberty LLC Units, for, at Liberty LLC’s election, (i) shares of Class A Common Stock at a redemption ratio of one share of Class A Common Stock for each Liberty LLC Unit redeemed, subject to conversion rate adjustments for stock splits, stock dividends and reclassification and other similar transactions or (ii) an equivalent amount of cash. Alternatively, upon the exercise of the Redemption Right, the Company (instead of Liberty LLC) will have the Call Right, which allows it to, for administrative convenience, acquire each tendered Liberty LLC Unit directly from the redeeming Liberty Unit Holder for, at its election, (x) one share of Class A Common Stock or (y) an equivalent amount of cash. In addition, upon a change of control of the Company, the Company has the right to require each holder of Liberty LLC Units (other than the Company) to exercise its Redemption Right with respect to some or all of such unitholder’s Liberty LLC Units. In connection with any redemption of Liberty LLC Units pursuant to the Redemption Right or the Call Right, the corresponding number of shares of Class B Common Stock will be canceled. LLC Interest Issuance Prior to the IPO and Corporate Reorganization, as described in Note 1, Liberty Holdings issued membership interests to investors in exchange for cash consideration. Total member contributions as of December 31, 2017 were $275.7 million, net of commitment and issuance fees. On January 17, 2018, in connection with the Corporate Reorganization, these membership interests were exchanged for Liberty LLC Units. See Note 1 for additional information regarding the Corporate Reorganization. Unit-Based Compensation Prior to the IPO and Corporate Reorganization, Liberty Holdings issued Class B units of Liberty Holdings (“Legacy Units”) to certain eligible employees of the Company. The Legacy Units were non-voting, except with respect to such matters that units are entitled to vote as a matter of law. In such cases, each Legacy Unit entitled the holder to 1/1000 th of one vote. Certain Legacy Units granted to eligible participants had an assigned benchmark value and were subject to vesting in accordance with the terms of each award letter. Upon termination of the holder’s employment for any reason, Liberty Holdings had the right, but not the obligation, to repurchase from the recipient those vested Legacy Units at fair value. The Company recognizes compensation expense for equity-based Legacy Units issued to employees based on the grant-date fair value of the awards and each award’s requisite service period. With the assistance from a third-party valuation expert, the Predecessor determined that the Legacy Units issued to employees were deemed to have a de minimis grant-date fair value based on their assigned benchmark values. In connection with the Corporate Reorganization, the unvested Legacy Units were exchanged for 1,258,514 shares of restricted stock with the same terms and requisite vesting conditions as the Legacy Units. Restricted Stock Awards Restricted stock awards are awards of Class A Common Stock that are subject to restrictions on transfer and to a risk of forfeitures if the award recipient is no longer an employee or director of the Company for any reason prior to the lapse of the restrictions. The following table summarizes the Company’s unvested restricted stock activity for the year ended December 31, 2019: Number of Shares Grant Date Fair Value per Share (1) Restricted Shares as of December 31, 2018 634,653 — Vested (366,448) — Forfeited — — Outstanding at December 31, 2019 268,205 $ — (1) As discussed above, the shares of restricted stock retain the grant date fair value of the Legacy Units. Long Term Incentive Plan On January 11, 2018, the Company adopted the Long Term Incentive Plan (“LTIP”) to incentivize employees, officers, directors and other service providers of the Company and its affiliates. The LTIP provides for the grant, from time to time, at the discretion of the Company's board of directors or a committee thereof, of stock options, stock appreciation rights, restricted stock, restricted stock units, stock awards, dividend equivalents, other stock-based awards, cash awards, substitute awards and performance awards. Subject to adjustment in the event of certain transaction or changes of capitalization in accordance with the LTIP, 12,908,734 shares of Class A Common Stock have been reserved for issuance pursuant to awards under the LTIP. Class A Common stock subject to an award that expires or is canceled, forfeited, exchanged, settled in cash or otherwise terminated without delivery of shares and shares withheld to pay the exercise price of, or to satisfy the withholding obligations with respect to, an award will again be available for delivery pursuant to other awards under the LTIP. Restricted Stock Units Restricted stock units (“RSUs”) granted pursuant to the LTIP, if they vest, will be settled in shares of the Company’s Class A Common Stock. RSUs were granted with vesting terms up to five years. Changes in non-vested RSUs outstanding under the LTIP during the year ended December 31, 2019 were as follows: Number of Units Weighted Average Grant Date Fair Value per Unit Non-vested as of December 31, 2018 1,193,683 $ 19.24 Granted 899,696 15.08 Vested (327,799) 19.97 Forfeited (31,045) 17.78 Outstanding at December 31, 2019 1,734,535 $ 16.97 Performance Restricted Stock Units Performance restricted stock units (“PSUs”) granted pursuant to the LTIP, if they vest, will be settled in shares of the Company’s Class A Common Stock. PSUs were granted with a three ’ results over the three year period from January 1, 2019 through December 31, 2021. The Company records compensation expense based on the Company’s best estimate of the number of PSUs that will vest at the end of the performance period. If such performance targets are not met, or are not expected to be met, no compensation expense is recognized and any recognized compensation expense is reversed. Changes in non-vested PSUs outstanding under the LTIP during the year ended December 31, 2019 were as follows: Number of Units Weighted Average Grant Date Fair Value per Unit Non-vested as of December 31, 2018 — $ — Granted 356,908 14.93 Vested — — Forfeited (27,631) 14.93 Outstanding at December 31, 2019 329,277 $ 14.93 Stock-based compensation is included in cost of services and general and administrative expenses in the Company’s consolidated and combined statements of operations. The Company recognized stock based compensation expense of $13.6 million for the year ended December 31, 2019 and $5.4 million for the year ended December, 31, 2018. There was approximately $21.9 million of unrecognized compensation expense relating to outstanding RSUs and PSUs as of December 31, 2019. The unrecognized compensation expense will be recognized on a straight-line basis over the weighted average remaining vesting period of 1.8 years. Dividends Liberty LLC paid quarterly distributions for a total of $22.5 million, or $0.05 per Liberty LLC Unit, to all Liberty LLC unitholders during the year ended December 31, 2019, of which $14.7 million was paid to the Company. For the year ended December 31, 2018, Liberty LLC paid quarterly distributions for a total of $11.6 million, or $0.05 per Liberty LLC Unit, to all Liberty LLC unitholders, of which $7.0 million was paid to the Company. The Company used the proceeds of the distributions to pay quarterly dividends to all holders of Class A Common Stock, which totaled $14.7 million and $7.0 million as of December 31, 2019 and December 31, 2018, respectively. Additionally, as of December 31, 2019 and December 31, 2018, the Company accrued $0.5 million and $0.2 million of dividends payable related to restricted stock and RSUs to be paid upon vesting, respectively. Dividends related to forfeited restricted stock and RSUs will be forfeited. Share Repurchase Program On September 10, 2018 the Company’s board of directors authorized a share repurchase plan to repurchase up to $100.0 million of the Company’s Class A Common Stock through September 30, 2019. On January 22, 2019, the Company’s board of directors authorized an additional $100.0 million under the share repurchase plan through January 31, 2021. During the year ended December 31, 2019, Liberty LLC redeemed and retired 1,303,003 Liberty LLC Units from the Company for $18.4 million, and the Company repurchased and retired 1,303,003 shares of Class A Common Stock for $18.4 million, or $14.66 average price per share. During the year ended December 31, 2018, Liberty LLC redeemed and retired 4,593,855 Liberty LLC Units from the Company for $82.9 million, and the Company repurchased and retired 4,593,855 shares of Class A Common Stock for $82.9 million, or $18.05 price per share including commissions. The repurchase in January 2019 completed the share repurchase amount authorized on September 10, 2018. During the year ended December 31, 2019, of the total amount of Class A Common Stock repurchased, 117,647 shares were repurchased from R/C Energy IV Direct Partnership, L.P., R/C IV Liberty Holdings, L.P., and Riverstone/Carlyle Energy Partners IV, L.P. (“R/C” and collectively, the “Riverstone Sellers”). During the year ended December 31, 2018, of the total amount of Class A Common Stock repurchased, 2,491,160 shares were repurchased pursuant to a Stock Purchase and Sale Agreement, dated as of September 14, 2018, by the Riverstone Sellers. For further details of this related party transaction, see Note 12—Related Party Transactions. As of December 31, 2019 and 2018, $98.7 million and $17.1 million remained authorized for future repurchases of Class A Common Stock under the share repurchase program, respectively. The Company accounts for the purchase price of repurchased common shares in excess of par value ($0.01 per share of Class A Common Stock) as a reduction of additional paid-in capital, and will continue to do so until additional paid-in capital is reduced to zero. Thereafter, any excess purchase price will be recorded as a reduction to retained earnings.

Net Income per Share

Net Income per Share	12 Months Ended
	Dec. 31, 2019
Earnings Per Share [Abstract]
Net Income per Share	Net Income per Share Basic net income per share measures the performance of an entity over the reporting period. Diluted net income per share measures the performance of an entity over the reporting period while giving effect to all potentially dilutive common shares that were outstanding during the period. The Company uses the “if-converted” method to determine the potential dilutive effect of its Class B Common Stock and the treasury stock method to determine the potential dilutive effect of outstanding restricted stock and RSUs. The following table reflects the allocation of net income to common stockholders and net income per share computations for the periods indicated based on a weighted average number of common stock outstanding for the period subsequent to the Corporate Reorganization on January 17, 2018: (In thousands, except per share data) Year Ended December 31, 2019 Year Ended December 31, 2018 Basic Net Income Per Share Numerator: Net income attributable to Liberty Oilfield Services Inc. Stockholders $ 39,003 $ 126,349 Denominator: Basic weighted average shares outstanding 72,334 68,838 Basic net income per share attributable to Liberty Oilfield Services Inc. Stockholders $ 0.54 $ 1.84 Diluted Net Income Per Share Numerator: Net income attributable to Liberty Oilfield Services Inc. Stockholders $ 39,003 $ 126,349 Effect of exchange of the shares of Class B Common stock for shares of Class A Common Stock 16,521 86,577 Diluted net income attributable to Liberty Oilfield Services Inc. Stockholders $ 55,524 $ 212,926 Denominator: Basic weighted average shares outstanding 72,334 68,838 Effect of dilutive securities: Restricted stock 512 906 Restricted stock units 1,771 602 Class B Common Stock 30,639 47,492 Diluted weighted average shares outstanding 105,256 117,838 Diluted net income per share attributable to Liberty Oilfield Services Inc. Stockholders $ 0.53 $ 1.81

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Prior to the IPO, the Predecessor was treated as a partnership for U.S. federal, state and local income tax purposes. As such, any liability for federal income tax was the responsibility of the members of the Predecessor. Accordingly, no provision for U.S. federal, state and local income tax has been provided in the combined financial statements of the Company for periods ending prior to the IPO. Following the IPO, the Company is a corporation and is subject to U.S. federal, state and local income tax on its share of Liberty LLC’s taxable income. Liberty LLC is treated as a partnership, and its income is passed through to its owners, for income tax purposes. Liberty LLC’s members, including the Company, are liable for federal, state and local income taxes based on their share of Liberty LLC’s pass-through taxable income. As of December 31, 2019, tax reporting by the Company's Predecessor for the years ended December 31, 2016 and 2017 is subject to examination by the tax authorities. With few exceptions, as of December 31, 2019, the Company is no longer subject to U.S. federal, state or local examinations by tax authorities for tax years ended before December 31, 2016. Income tax (benefit) expense reflected in the consolidated statement of operations consisted of: ($ in thousands) Year Ended December 31, 2019 Year Ended December 31, 2018 Current: Federal (9,907) 16,684 State 551 3,213 Total Current $ (9,356) $ 19,897 Deferred: Federal 23,419 19,063 State (11) 1,425 Total Deferred $ 23,408 $ 20,488 Income tax expense $ 14,052 $ 40,385 A reconciliation of the statutory U.S. federal income tax rate of 21.0% to the Company ’ s effective income tax rate is as follows: ($ in thousands) Year Ended December 31, 2019 Year Ended December 31, 2018 Federal income tax expense at statutory rate $ 18,672 $ 60,778 State and local income tax expense, net 1,525 4,456 Pre-IPO income before income taxes attributable to the Predecessor — (1,958) Non-controlling interest (7,531) (24,606) Other 1,386 1,715 Total income tax expense $ 14,052 $ 40,385 The effective combined U.S. federal and state income tax rate applicable to the Company for the period commencing on January 17, 2018, the date of the Corporate Reorganization, through December 31, 2019 was 15.8%. The Company recognized income tax expense of $14.1 million during the year ended December 31, 2019. The Company’s effective tax rate is less than the statutory federal income tax rate of 21.0% because no taxes are payable by the Company for the non-controlling interest’s share of Liberty LLC’s pass-through income for federal, state and local income tax reporting. During 2019, the non-controlling interest effect resulted in a $7.5 million reduction in income tax expenses. The tax effects of temporary differences that give rise to the deferred tax assets and deferred tax liabilities are presented below: ($ in thousands) Year-Ended December 31, 2019 Year Ended December 31, 2018 Deferred tax assets: Federal net operating losses $ 10,486 $ 1,638 State net operating losses 925 160 Realized tax benefit - TRAs 48,575 15,845 Total deferred tax assets 59,986 17,643 Deferred tax liabilities: Investment in Liberty LLC $ 79,099 $ 50,325 Other 546 312 Total deferred tax liabilities 79,645 50,637 Net deferred tax liability $ 19,659 $ 32,994 As of December 31, 2019, the Company had significant deferred tax assets and liabilities. The deferred tax assets include U.S. federal and state net operating losses and the step-up in basis of depreciable assets under Section 754 of the Internal Revenue Code of 1986, as amended. As a result of the IPO and Corporate Reorganization, the Company recorded a deferred tax asset and liability for the difference between the book value and the tax value of the Company's investment in Liberty LLC. The deferred tax assets have been recorded for tax attributes contributed to the Company as part of the Corporate Reorganization. Deferred tax liabilities of $29.3 million were recorded relating to Liberty LLC Units acquired through the reorganization. The initial deferred tax liability is recorded as a long term liability and additional paid in capital on the consolidated balance sheet as of December 31, 2019. As of December 31, 2019, the Company has available U.S. federal net operating loss carryforwards to reduce future taxable income of $3.7 million expiring in 2027, and $44.3 million with no expiration date. Uncertain Tax Positions The Company records uncertain tax positions on the basis of a two-step process in which (1) the Company determines whether it is more likely than not the tax positions will be sustained on the basis of the technical merits of the position and (2) for those tax positions meeting the more likely than not recognition threshold, the Company recognizes the largest amount of tax benefit that is more than 50% likely to be realized upon ultimate settlement with the related tax authority. The Company determined that no liability for unrecognized tax benefits for uncertain tax positions was required at December 31, 2019. In addition, the Company does not believe that it has any tax positions for which it is reasonably possible that it will be required to record a significant liability for unrecognized tax benefits within the next twelve months. If the Company were to record an unrecognized tax benefit, the Company will recognize interest and penalties related to income tax matters in income tax expense. Tax Distributions Liberty LLC is treated as a partnership for income tax purposes. Federal, state and local taxes resulting from the pass-through taxable income of Liberty LLC are obligations of its members. Net profits and losses are generally allocated to the members of Liberty LLC (including the Company) in accordance with the number of Liberty LLC Units held by each member for tax purposes. The Liberty LLC Agreement provides for pro rata cash distributions, and in certain cases non-pro rata cash advances, to assist members (including the Company) in paying their income tax liabilities. The Liberty LLC Agreement requires any tax advances to be proportionally repaid in connection with any redemption of Liberty LLC Units pursuant to the Redemption Right or the Call Right. Net distributions and advances paid by Liberty LLC to non-controlling interest holders were de minimis and $21.3 million, respectively, for the years ended December 31, 2019 and 2018. Tax Receivable Agreements The term of each TRA commenced on January 17, 2018, and will continue until all such tax benefits that are subject to such TRA have been utilized or expired, unless the Company experiences a change of control (as defined in the TRAs, which includes certain mergers, asset sales and other forms of business combinations) or the TRAs are terminated early (at the Company’s election or as a result of its breach), and the Company makes the termination payments specified in such TRA. The amounts payable, as well as the timing of any payments, under the TRAs are dependent upon significant future events and assumptions, including the timing of the redemptions of Liberty LLC Units, the price of our Class A Common Stock at the time of each redemption, the extent to which such redemptions are taxable transactions, the amount of the redeeming unit holder’s tax basis in its Liberty LLC Units at the time of the relevant redemption, the characterization of the tax basis step-up, the depreciation and amortization periods that apply to the increase in tax basis, the amount of net operating losses available to the Company as a result of the Corporate Reorganization, the amount and timing of taxable income the Company generates in the future, the U.S. federal income tax rate then applicable, and the portion of the Company’s payments under the TRAs that constitute imputed interest or give rise to depreciable or amortizable tax basis. Prior to the Corporate Reorganization, one of the Legacy Owners distributed a portion of its member interest in Liberty Holdings to R/C IV Non-U.S. LOS Corp. (“R/C IV”). Subsequently, in conjunction with the Corporate Reorganization, R/C IV was contributed to the Company. At the time of the contribution, R/C IV had net operating loss carryforwards totaling $10.9 million for federal income tax purposes and $10.9 million for certain state income tax purposes, which became available for the Company's use as a result of the contribution. As a result of the Company being in a net income position and the expected utilization of deferred tax assets, the Company recognized a deferred tax asset of $2.6 million and a corresponding $2.3 million liability pursuant to the TRAs. During the year ended December 31, 2018, exchanges of Liberty LLC Units and shares of Class B Common Stock resulted in an increase of $14.5 million in amounts payable under the TRAs, and a net increase of $17.1 million in deferred tax assets, all of which were recorded through equity. At December 31, 2018, the Company’s liability under the TRAs was $16.8 million, all of which is presented as a component of long term liabilities, and the related deferred tax assets totaled $19.7 million. During the year ended December 31, 2019, exchanges of Liberty LLC Units and shares of Class B Common Stock resulted in an increase of $34.0 million in amounts payable under the TRAs, and a net increase of $40.0 million in deferred tax assets, all of which were recorded through equity. At December 31, 2019, the Company’s liability under the TRAs was $50.3 million, a portion of which is presented as a component of current liabilities of $1.8 million, and a portion of which is presented as a component of long term liabilities of $48.5 million, and the related deferred tax assets totaled $49.9 million

Defined Contribution Plan

Defined Contribution Plan	12 Months Ended
	Dec. 31, 2019
Retirement Benefits [Abstract]
Defined Contribution Plan	Defined Contribution PlanThe Company sponsors a 401(k) defined contribution retirement plan covering eligible employees. The Company makes matching contributions, which were temporarily suspended in May 2015, but were resumed in April 2017 at a rate of $1.00 for each $1.00 of employee contribution, subject to a cap of 3% of the employee’s salary. In October 2017, the cap on these contributions was increased to 6% of the employee’s base salary. Contributions made by the Company were $15.7 million, $13.8 million, and $5.1 million for the years ended December 31, 2019, 2018 and 2017, respectively.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2019
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions Prior to the Corporate Reorganization, one of the members of Liberty Holdings contributed a portion of its member interest in Liberty Holdings to R/C IV Non-U.S. LOS Corp (“R/C IV”). Subsequently, in conjunction with the Corporate Reorganization, R/C IV was contributed to Liberty LLC. R/C IV had net operating loss carryforwards for federal and state income tax purposes which resulted in the recognition of a $2.9 million payable pursuant to the TRAs. During the year ended December 31, 2019, R/C IV Liberty Holdings, L.P. exercised its redemption right and redeemed 9,605,786 shares of Class B Common Stock resulting in an increase in tax basis, as described in Note—10 Income Taxes— Tax Receivable Agreements , and recognition of $22.3 million in amounts payable under the TRAs. As of December 31, 2019 and 2018, the Company’s current liabilities under the TRAs payable to R/C IV Liberty Holdings, L.P. and R/C IV Non-US were $1.3 million and $0, respectively, included in accrued interest and other and non-current liabilities were $23.8 million and $2.9 million, respectively, in payable pursuant to tax receivable agreements in the accompanying condensed consolidated balance sheets. The Company repurchased 117,647 shares and 2,491,160 shares of Class A Common Stock from the Riverstone Sellers, at a weighted average purchase price of $17.00 per share and $18.96 per share pursuant to the share repurchase program (see Note 8—Equity —Share Repurchase Program ) for the years ended December 31, 2019 and 2018, respectively. In connection with the Corporate Reorganization, the Company engaged in transactions with affiliates (see Note 1—Organization and Basis of Presentation) including entering into the TRAs with affiliates (see Note 10—Income Taxes— Tax Receivable Agreements ). Also in conjunction with the Corporate Reorganization, Liberty Holdings contributed $2.1 million of additional assets to Liberty LLC and Redeemable Common Units in the amount of $42.6 million were settled. In September 2011, Liberty Resources LLC, an oil and gas exploration and production company, and its successor entity (collectively, the “Affiliate”) and LOS, companies with common ownership and management, entered into a services agreement (the “Services Agreement”) whereby the Affiliate is to provide certain administrative support functions to LOS and a master service agreement whereby LOS provides hydraulic fracturing services to the Affiliate at market service rates. The amounts incurred under the Services Agreement by LOS during the years ended December 31, 2019, 2018 and 2017, were $0, $0.2 million, and $0, respectively. The Services Agreement was terminated during June 2018. The amounts of the Company’s revenue related to hydraulic fracturing services provided to the Affiliate for the years ended December 31, 2019, 2018 and 2017, were $18.3 million, $23.1 million and $24.7 million, respectively. As of December 31, 2019 and 2018, $7.1 million and $15.1 million, respectively, of the Company’s accounts receivable—related party was with the Affiliate. On June 24, 2019 (the “Agreement Date”), the Company entered into an agreement with the Affiliate to amend payment terms for outstanding invoices due as of the Agreement Date to be due on July 31, 2020. On September 30, 2019, the agreement was amended to extend the due date of the remaining amounts outstanding to October 31, 2020. Amounts outstanding from the Affiliate as of the Agreement Date were $15.6 million. As of December 31, 2019, amounts outstanding under the amended payment terms from the Affiliate are $2.5 million, all of which is presented in accounts and notes receivable —related party in the accompanying consolidated balance sheet. The balance outstanding is subject to interest at 13% annual percent yield, retroactively applied to the respective invoice date. During the year ended December 31, 2019, interest income from the Affiliate was $1.8 million, and accrued interest as of December 31, 2019 was $0. Receivables earned for services performed after the Agreement Date continue to be subject to normal 30-day payment terms, provided that any amount unpaid after 60 days is subject to 13% interest. Liberty Holdings entered into an advisory agreement, dated December 30, 2011, with Riverstone/Carlyle Energy Partners IV, L.P. (“R/C”), in which R/C agreed to provide certain administrative advisory services to Liberty Holdings. The service fees incurred to R/C for the years ended December 31, 2019, 2018 and 2017 were approximately $0, $0 and $1.5 million, respectively. The advisory services agreement was terminated pursuant to an agreement effective as of January 11, 2018. On January 11, 2018, Liberty Holdings, R/C and other parties entered into a Master Reorganization Agreement that, among other things, crystallized the “waterfall” provisions of Article VI of the Third Amended and Restated Limited Liability Agreement of Liberty Holdings, dated October 11, 2016 (the “Holdings LLC Agreement”), in connection with the initial public offering of shares of Class A Common Stock. As part of this crystallization, R/C and affiliated entities (collectively, the “R/C Affiliates”) received shares of Class A Common Stock, including 117,647 shares of Class A Common Stock (such 117,647 referred to as the “Issued Shares”) to compensate R/C Affiliates for certain accrued preferred returns but which would not have been issued had the $2.0 million in fees owing under the advisory agreement been paid in cash. Had this fee been paid in cash on or prior to January 11, 2018, R/C and Liberty Holdings acknowledge that R/C Affiliates would not have received the Issued Shares in the crystallization pursuant to the provisions of the Holdings LLC Agreement. Subsequently, during the fourth quarter of 2018, R/C asserted that certain provisions of the termination of services agreement provided for R/C to receive $2.0 million in cash as payment of those accrued fees. To resolve this matter, the Company agreed to pay R/C Affiliates $2.0 million in cash in exchange for the return, at the IPO price, of the Issued Shares and $0.3 million for interest and the settlement of the matter. Accordingly, $2.3 million was recorded as accrued liabilities—related party in the accompanying consolidated balance sheet as of December 31, 2018 and subsequently paid in January 2019. The returned shares of Class A Common Stock were canceled and retired, and the Company does not expect to incur future expense related to the advisory agreement or termination thereof. During 2016, Liberty Holdings entered into a future commitment to invest and become a non-controlling minority member in Proppant Express Investments, LLC (“PropX Investments”), the owner of Proppant Express Solutions, LLC (“PropX”), a provider of proppant logistics equipment. LOS is party to a services agreement (the “PropX Services Agreement”) whereby LOS is to provide certain administrative support functions to PropX, and LOS is to purchase and lease proppant logistics equipment from PropX. The PropX Services Agreement was terminated on May 29, 2018; however, the Company continues to purchase and lease equipment from PropX. For the years ended December 31, 2019 and 2018 the Company purchased proppant logistics equipment of $0 and $3.1 million and leased proppant logistics equipment during the years ended December 31, 2019, 2018 and 2017 for $9.8 million, $4.4 million and $3.7 million, respectively. Receivables from PropX as of December 31, 2019 and 2018 were $0. Payables to PropX as of December 31, 2019 and 2018 were $0.8 million and $0.2 million, respectively.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments & Contingencies Purchase Commitments (tons, per ton, gallons, per gallon and per rail car prices are not in thousands) The Company enters into purchase and supply agreements to secure supply and pricing of proppants, and related proppant transportation, as well as chemicals. As of December 31, 2019 and 2018, the agreements commit the Company to purchase 7,978,300 and 11,266,000 tons, respectively, of proppant through February 1, 2022. Amounts above also include commitments to pay for transport fees on minimum amounts of proppants or railcars. Certain proppant supply agreements contain a clause whereby in the event that the Company fails to purchase minimum volumes, as defined in the agreement, during a specific time period, a shortfall fee may apply. Additionally, related proppant transload service commitments extend through 2024. As of December 31, 2019 and 2018, the Company has commitments to purchase 3,339,534 and 18,852,000 gallons of chemicals through December 31, 2020. Future proppant, transload, chemical and rail car commitments are as follows: Year ending December 31, 2020 $ 349,096 2021 139,937 2022 17,471 2023 12,598 2024 6,405 Thereafter — $ 525,507 Litigation From time to time, the Company is subject to legal and administrative proceedings, settlements, investigations, claims and actions. The Company’s assessment of the likely outcome of litigation matters is based on its judgment of a number of factors including experience with similar matters, past history, precedents, relevant financial and other evidence and facts specific to the matter. Notwithstanding the uncertainty as to the final outcome, based upon the information currently available, management does not believe any matters in aggregate will have a material adverse effect on its financial position or results of operations.

Selected Quarterly Financial Da

Selected Quarterly Financial Data (unaudited)	12 Months Ended
	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Financial Data (unaudited)	Selected Quarterly Financial Data (unaudited) The following table sets forth certain unaudited financial and operating information for each quarter of the years ended December 31, 2019 and 2018. The unaudited quarterly information includes all adjustments that, in the opinion of management, are necessary for the fair presentation of information presented. Operating results for interim periods are not necessarily indicative of the results that may be expected for the full fiscal year. ($ in thousands) Year Ended December 31, 2019 Selected Financial Data: First Quarter Second Quarter Third Quarter Fourth Quarter Revenue $ 535,148 $ 542,147 $ 515,079 $ 397,971 Operating costs and expenses: Cost of services (exclusive of depreciation and amortization shown separately below) 429,299 426,444 421,007 344,430 General and administrative 22,088 23,989 25,302 26,210 Depreciation and amortization 38,387 40,368 42,324 44,299 Loss (gain) on disposal of assets 1,223 143 (124) 1,359 Total operating costs and expenses 490,997 490,944 488,509 416,298 Operating income (loss) 44,151 51,203 26,570 (18,327) Other expense: Interest expense, net 4,182 3,597 3,726 3,176 Net income (loss) before income taxes 39,969 47,606 22,844 (21,503) Income tax expense (benefit) 6,060 7,083 4,004 (3,095) Net income (loss) 33,909 40,523 18,840 (18,408) Less: Net income (loss) attributable to non-controlling interests 15,788 18,491 7,842 (6,260) Net income (loss) attributable to Liberty Oilfield Services Inc. stockholders $ 18,121 $ 22,032 $ 10,998 $ (12,148) Net income (loss) attributable to Liberty Oilfield Services Inc. stockholders per common share: Basic $ 0.27 $ 0.32 $ 0.15 $ (0.15) Diluted $ 0.26 $ 0.32 $ 0.15 $ (0.15) ($ in thousands) Year ended December 31, 2018 Selected Financial Data: First Quarter Second Quarter Third Quarter Fourth Quarter Revenue $ 495,160 $ 628,084 $ 558,777 $ 473,115 Operating costs and expenses: Cost of services (exclusive of depreciation and amortization shown separately below) 376,827 455,469 418,867 377,590 General and administrative 21,677 27,313 24,659 25,403 Depreciation and amortization 28,016 30,606 32,305 34,183 Loss (gain) on disposal of assets 80 485 701 (5,608) Total operating costs and expenses 426,600 513,873 476,532 431,568 Operating income 68,560 114,211 82,245 41,547 Other expense: Interest expense, net 6,494 3,540 3,648 3,463 Net income before income taxes 62,066 110,671 78,597 38,084 Income tax expense 8,079 15,930 12,229 4,147 Net income 53,987 94,741 66,368 33,937 Less: Net income attributable to Predecessor, prior to Corporate Reorganization 8,705 — — — Less: Net income attributable to non-controlling interests 21,607 45,146 32,275 14,951 Net income attributable to Liberty Oilfield Services Inc. stockholders $ 23,675 $ 49,595 $ 34,093 $ 18,986 Net income attributable to Liberty Oilfield Services Inc. stockholders per common share: Basic $ 0.34 $ 0.72 $ 0.50 $ 0.28 Diluted $ 0.34 $ 0.71 $ 0.49 $ 0.27

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2019
Subsequent Events [Abstract]
Subsequent Events	Subsequent EventsOn January 22, 2020, the Company announced a cash dividend of $0.05 per share of Class A common stock, to be paid on March 20, 2020 to holders of record as of March 6, 2020. A distribution of $0.05 per unit has also been approved for holders of units in Liberty LLC, which will use the same record and payment date.There were no other significant subsequent events requiring disclosure or recognition other than those disclosed in these notes to the consolidated and combined financial statements.

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying consolidated and combined financial statements were prepared using generally accepted accounting principles in the United States of America (“GAAP”) and the instructions to Form 10-K, Regulation S-X and the rules and regulations of the Securities and Exchange Commission. The accompanying consolidated and combined financial statements and related notes present the consolidated financial position, results of operations, cash flows, and equity of the Company as of and for the years ended December 31, 2019 and 2018, and the combined results of operations and cash flows of the Predecessor for the year ended December 31, 2017. All intercompany amounts have been eliminated in the presentation of the consolidated financial statements of the Company and the combined financial statements of the Predecessor. Comprehensive income is not reported due to the absence of items of other comprehensive income or loss during the periods presented. The consolidated and combined financial statements include financial data at historical cost as the contribution of assets is considered to be a reorganization of entities under common control. The consolidated and combined financial statements may not be indicative of the actual level of assets, liabilities and costs that would have been incurred by the Predecessor if it had operated as an independent, publicly-traded company during the periods prior to the IPO or of the costs expected to be incurred in the future. The consolidated and combined financial statements for periods prior to January 17, 2018, reflect the historical results of the Predecessor. The consolidated financial statements include the amounts of the Company and all majority owned subsidiaries where the Company has the ability to exercise control.
Use of Estimates	Use of Estimates The preparation of consolidated and combined financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the consolidated and combined financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The consolidated and combined financial statements include certain amounts that are based on management’s best estimates and judgments. The most significant estimates relate to the collectibility of accounts receivable and estimates of allowance for doubtful accounts, the useful lives and salvage values of long-lived assets, future cash flows associated with long-lived assets, net realizable value of inventory, and equity unit valuation. These estimates may be adjusted as more current information becomes available.
Cash and Cash Equivalents	Cash and Cash Equivalents The Company considers all highly liquid instruments purchased with an original maturity of three months or less to be cash equivalents. The Company continually monitors its positions with, and the credit quality of, the financial institutions with which it has banking relationships. As of the balance sheet date, and periodically throughout the year, the Company has maintained balances in various operating accounts in excess of federally insured limits.
Accounts Receivable	Accounts Receivable The Company analyzes the need for an allowance for doubtful accounts for estimated losses related to potentially uncollectible accounts receivable on a case-by-case basis throughout the year. In establishing the required allowance, management considers historical losses adjusted to take into account current market conditions and the customers’ financial condition, the amount of receivables, the current receivables aging and current payment patterns. The Company reserves amounts based on specific identification. Account balances are charged to the allowance after all means of collection have been exhausted and the potential for recovery is considered remote. It is reasonably possible that the Company’s estimate of the allowance for doubtful accounts will change and that losses ultimately incurred could differ materially from the amounts estimated in determining the allowance.
Inventories	Inventories Inventories consist of raw materials used in the hydraulic fracturing process, such as proppants, chemicals, and field service equipment maintenance parts and are stated at the lower of cost, determined using the weighted average cost method, or net realizable value. Inventories are charged to cost of services as used when providing hydraulic fracturing services. Net
Property and Equipment	Property and Equipment Property and equipment are stated at cost. Depreciation and amortization expense is recognized on property and equipment, excluding land, utilizing the straight-line method over the estimated useful lives, ranging from two Construction in-progress, a component of property and equipment, represents long-lived assets being developed by the Company. These assets are not subject to depreciation until they are completed and ready for their intended use, at which point the Company reclassifies them to field services equipment or vehicles, as appropriate. The Company assesses its long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability is assessed using undiscounted future net cash flows of assets grouped at the lowest level for which there are identifiable cash flows independent of the cash flows of other groups of assets. The Company determined the lowest level of identifiable cash flows to be at the asset group, which is the aggregate of the Company’s hydraulic fracturing fleets that are in service. A long-lived asset is not recoverable if its carrying amount exceeds the sum of estimated undiscounted cash flows expected to result from the use and eventual disposition. When alternative courses of action to recover the carrying amount of the asset group are under consideration, estimates of future undiscounted cash flows take into account possible outcomes and probabilities of their occurrence. If the carrying amount of the asset is not recoverable, an impairment loss is recognized in an amount by which its carrying amount exceeds its estimated fair value, such that its carrying amount is adjusted to its estimated fair value, with an offsetting charge to impairment expense. The Company measures the fair value of its property and equipment using the discounted cash flow method. The expected future cash flows used for impairment reviews and related fair value calculations are based on judgmental assessments of projected revenue growth, fleet count, utilization, gross margin rates, selling, general and administrative rates, working capital fluctuations, capital expenditures, discount rates and terminal growth rates.
Major Maintenance Activities	Major Maintenance Activities The Company incurs maintenance costs on its major equipment. The determination of whether an expenditure should be capitalized or expensed requires management judgment in the application of how the costs incurred benefit future periods, relative to the Company’s capitalization policy. Costs that either establish or increase the efficiency, productivity, functionality or life of a fixed asset are capitalized and depreciated over the remaining useful life of the asset.
Leases	Leases On January 1, 2019, the Company adopted Accounting Standards Update (“ASU”) No. 2016-02, Leases (Accounting Standard Codification (“ASC”) Topic 842), as amended by other ASUs issued since February 2016 (“ASU 2016-02” or “ASC Topic 842”), using the modified retrospective transition method applied at the effective date of the standard. By electing this optional transition method, information prior to January 1, 2019 has not been restated and continues to be reported under the accounting standards in effect for the period (ASC Topic 840). The Company elected the package of practical expedients permitted under the transition guidance within the new standard, including the option to carry forward the historical lease classifications and assessment of initial direct costs. The Company also elected to account for lease and non-lease components as a single component, and to not include leases with an initial term of less than 12 months in the lease assets and liabilities. The adoption of ASC Topic 842 resulted in the recognition of finance lease right-of-use assets, operating lease right-of-use assets, and lease liabilities for finance and operating leases. As of January 1, 2019, the adoption of the new standard resulted in the recognition of finance lease assets of $57.2 million, including $2.1 million and $2.0 million reclassified from prepaid and other current assets and other assets, respectively, and finance lease liabilities of $53.2 million. Additionally, the Company recorded operating lease assets of $64.0 million, including $1.9 million reclassified from prepaid and other current assets, and operating lease liabilities of $63.6 million, including $1.5 million reclassified from accrued interest and other liabilities as of January 1, 2019. There was no significant impact to the consolidated statements of income, equity or cash flows. For leases entered into after January 1, 2019, the Company determines if an arrangement is a lease at inception and evaluates identified leases for operating or finance lease treatment. Operating or finance lease right-of-use assets and liabilities are recognized at the commencement date based on the present value of lease payments over the lease term. The Company uses the rate implicit in the lease, when available, or an estimated fully collateralized incremental borrowing rate corresponding with
Deferred Financing Costs	Deferred Financing Costs Costs associated with obtaining debt financing are deferred and amortized to interest expense using the effective interest method. In accordance with ASU No. 2015-03 and 2015-15, for all periods the Company has reflected deferred financing costs related to term loan debt as a direct deduction from the carrying amount, and costs associated with line-of-credit arrangements as other assets.
Income Taxes	Income Taxes Following the IPO, the Company is a corporation and is subject to U.S. federal, state and local income tax on its share of Liberty LLC’s taxable income. As a result of the IPO and Corporate Reorganization, the Company recorded deferred tax assets and liabilities for the difference between the book value of assets and liabilities for financial reporting purposes and those amounts applicable for income tax purposes. Deferred income taxes are computed using the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the consolidated financial statements. Deferred tax assets and liabilities are calculated using the enacted tax rates in effect for the year in which the deferred tax asset or liability is expected to reverse. The Company classifies all deferred tax assets and liabilities as non-current. The Company recognizes the financial statement effects of a tax position when it is more-likely-than-not, based on the technical merits, that the position will be sustained upon examination. A tax position that meets the more-likely-than-not recognition threshold is measured as the largest amount of tax benefit that is greater than 50% likely of being realized upon ultimate settlement with a taxing authority. Previously recognized tax positions are reversed in the first period in which it is no longer more-likely-than-not that the tax position would be sustained upon examination. Income tax related interest and penalties, if applicable, are recorded as a component of the provision for income tax expense. Tax Receivable Agreements In connection with the IPO, on January 17, 2018, the Company entered into two Tax Receivable Agreements (the “TRAs”) with the R/C Energy IV Direct Partnership, L.P. and the Legacy Owners that continued to own Liberty LLC Units (each such person and any permitted transferee, a “Tax Receivable Agreement Holder” and together, the “Tax Receivable Agreement Holders”). The TRAs generally provide for the payment by the Company of 85% of the net cash savings, if any, in U.S. federal, state, and local income tax and franchise tax (computed using simplifying assumptions to address the impact of state and local taxes) that the Company actually realizes (or is deemed to realize in certain circumstances) in periods after the IPO as a result, as applicable to each Tax Receivable Agreement Holder, of (i) certain increases in tax basis that occur as a result of the Company’s acquisition (or deemed acquisition for U.S. federal income tax purposes) of all or a portion of such Tax Receivable Agreement Holder’s Liberty LLC Units in connection with the IPO or pursuant to the exercise of the right (the “Redemption Right”) or the Company’s right (the “Call Right”), (ii) any net operating losses available to the Company as a result of the Corporate Reorganization, and (iii) imputed interest deemed to be paid by the Company as a result of, and additional tax basis arising from, any payments the Company makes under the TRAs. With respect to obligations the Company expects to incur under the TRAs (except in cases where the Company elects to terminate the TRAs early, the TRAs are terminated early due to certain mergers, asset sales, or other changes of control or the Company has available cash but fails to make payments when due), generally the Company may elect to defer payments due under the TRAs if the Company does not have available cash to satisfy its payment obligations under the TRAs or if its contractual obligations limit its ability to make such payments. Any such deferred payments under the TRAs generally will accrue interest. In certain cases, payments under the TRAs may be accelerated and/or significantly exceed the actual benefits, if any, the Company realizes in respect of the tax attributes subject to the TRAs. The Company accounts for amounts payable under the TRAs in accordance with ASC Topic 450, Contingencies .
Share Repurchases	Share Repurchases The Company accounts for the purchase price of repurchased Class A Common Stock in excess of par value ($0.01 per share of Class A Common Stock) as a reduction of additional paid-in capital, and will continue to do so until additional paid-in capital is reduced to zero. Thereafter, any excess purchase price will be recorded as a reduction to retained earnings.
Revenue Recognition	Revenue Recognition Effective January 1, 2018, the Company adopted a comprehensive new revenue recognition standard, ASC Topic 606- Revenue from Contracts with Customers . The details of the significant changes to accounting policies resulting from the adoption of the new standard are set out below. The Company adopted the standard using a modified retrospective method; accordingly, the comparative information for the year ended December 31, 2017 has not been adjusted and continues to be reported under the previous revenue standard. The adoption of this standard did not have a material impact to the consolidated financial position, reported revenue, results of operations or cash flows as of and for the year ended December 31, 2018. Under the new standard, revenue recognition is based on the transfer of control, or the customer’s ability to benefit from the services and products in an amount that reflects the consideration expected to be received in exchange for those services and products. In recognizing revenue for services and products, the transaction price is determined from sales orders or contracts with customers. Revenue is recognized at the completion of each fracturing stage, and in most cases the price at the end of each stage is fixed, however, in limited circumstances contracts may contain variable consideration. Variable consideration typically may relate to discounts, price concessions and incentives. We estimate variable consideration based on the amount of consideration we expect to receive. The Company accrues revenue on an ongoing basis to reflect updated information for variable consideration as performance obligations are met. The Company also assesses customers’ ability and intention to pay, which is based on a variety of factors including historical payment experience and financial condition. Payment terms and conditions vary by contract type, although terms generally include a requirement of payment within 30 to 45 days. In connection with the adoption of ASC Topic 842, the Company determined that certain of its service revenue contracts contain a lease component. The Company elected to adopt a practical expedient available to lessors, which allows the Company to combine the lease and non-lease components and account for the combined component in accordance with the accounting treatment for the predominant component. Therefore, the Company combines the lease and service component for certain of the Company’s service contracts and continues to account for the combined component under ASC Topic 606, Revenue from Contracts with Customers.
Deferred Revenue	Deferred RevenueFrom time to time, the Company may require partial payment in advance from new customers to secure credit or from existing customers in order to secure additional hydraulic fracturing services. Initially, such payments are recorded in the accompanying consolidated and combined financial statements as deferred revenue, and upon performance of the agreed services, the Company recognizes revenue consistent with its revenue recognition policy described above.
Fleet Start-up Costs	Fleet Start-up Costs The Company incurs start-up costs to commission a new fleet or district. These costs include hiring and training of personnel, and acquisition of consumable parts and tools. Start-up costs are expensed as incurred, and are reflected in general and administrative expense in the consolidated and combined statement of operations. Start-up costs for the years ended December 31, 2019, 2018 and 2017, were $4.5 million, $10.1 million and $14.0 million, respectively. Start-up costs incurred during the years ended December 31, 2019, 2018 and 2017 related to the establishment of one, three, and nine new fleets, respectively.
Reclassifications	Reclassifications Certain amounts in the prior period financial statements have been reclassified to conform to the presentation of the current period financial statements. These reclassifications had no effect on the previously reported net income.
Recently Adopted and Issued Accounting Standards	Recently Adopted Accounting Standards On January 1, 2019, the Company adopted ASC Topic 842 using the modified retrospective transition method applied at the effective date of the standard. By electing the modified retrospective transition method, information prior to January 1, 2019 has not been restated and continues to be reported under the accounting standards in effect for the period (Topic 840). The adoption of this standard impacted the consolidated statements of financial position by requiring the recognition of a right-of-use asset and a lease liability; however, the adoption of this standard did not have a significant impact on the consolidated statements of operations or cash flows. See Significant Accounting Policies - Leases for additional information regarding this accounting policy. Recently Issued Accounting Standards In June 2016, the Financial Accounting Standards Board (“FASB”) issued ASU 2016-13, “ Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Dec. 31, 2019
Inventory Disclosure [Abstract]
Schedule of Inventories	Inventories consist of the following: December 31, ($ in thousands) 2019 2018 Proppants $ 14,013 $ 22,038 Chemicals 10,076 10,781 Maintenance parts 64,458 27,205 $ 88,547 $ 60,024

Property and Equipment (Tables)

Property and Equipment (Tables)	12 Months Ended
	Dec. 31, 2019
Property, Plant and Equipment [Abstract]
Property and Equipment	Property and equipment consist of the following: Estimated December 31, 2019 2018 ($ in thousands) Land N/A $ 5,400 $ 5,400 Field services equipment 2-7 978,418 778,423 Vehicles 4-7 60,290 59,807 Buildings and facilities 5-30 29,930 27,795 Office equipment and furniture 2-7 6,623 6,200 1,080,661 877,625 Less accumulated depreciation and amortization (455,687) (307,277) 624,974 570,348 Construction in-progress N/A 26,729 56,705 $ 651,703 $ 627,053

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2019
Leases [Abstract]
Lease, Cost	The components of lease expense as of December 31, 2019 were as follows: ($ in thousands) December 31, 2019 Finance lease cost: Amortization of right-of-use assets $ 10,256 Interest on lease liabilities 2,652 Operating lease cost 20,731 Variable lease cost 3,118 Total lease cost $ 36,757
Lessee, Supplemental Cash Flow Information	Supplemental cash flow and other information related to leases as of December 31, 2019 were as follows: ($ in thousands) December 31, 2019 Cash paid for amounts included in measurement of liabilities: Operating leases $ 20,849 Finance leases 14,795 Right-of-use assets upon adoption of ASC 842 and obtained in exchange for new lease liabilities: Operating leases 70,611 Finance leases 65,333
Lease Term And Discount Rate, Lessee	Lease terms and discount rates as of December 31, 2019 were as follows: December 31, 2019 Weighted-average remaining lease term: Operating leases 6.4 years Finance leases 1.3 years Weighted-average discount rate: Operating leases 5.4 % Finance leases 5.2 %
Lessee, Operating Lease, Liability, Maturity	Future minimum lease commitments as of December 31, 2019 are as follows: ($ in thousands) Finance Operating 2020 $ 26,407 $ 18,262 2021 20,626 13,696 2022 4,135 7,249 2023 — 4,365 2024 — 3,646 Thereafter — 16,017 Total lease payments 51,168 63,235 Less imputed interest (2,638) (10,675) Total $ 48,530 $ 52,560
Finance Lease, Liability, Maturity	Future minimum lease commitments as of December 31, 2019 are as follows: ($ in thousands) Finance Operating 2020 $ 26,407 $ 18,262 2021 20,626 13,696 2022 4,135 7,249 2023 — 4,365 2024 — 3,646 Thereafter — 16,017 Total lease payments 51,168 63,235 Less imputed interest (2,638) (10,675) Total $ 48,530 $ 52,560
Schedule of Future Minimum Rental Payments for Operating Leases	In accordance with the prior guidance, ASC 840, Leases , the future minimum lease payments as determined prior to the adoption of ASC 842, Leases , for the fiscal year ended December 31, 2018, were as follows: ($ in thousands) 2019 $ 42,717 2020 48,685 2021 32,390 2022 6,093 2023 4,303 Thereafter 19,742 $ 153,930

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Schedule of Debt	: December 31, 2019 2018 Term Loan Outstanding $ 109,966 $ 111,715 Revolving Line of Credit — — Deferred financing costs and original issue discount (3,826) (5,191) Total debt, net of deferred financing costs and original issue discount $ 106,140 $ 106,524 Current portion of long-term debt, net of discount $ 409 $ 385 Long-term debt, net of discount and current portion 105,731 106,139 $ 106,140 $ 106,524
Schedule of Maturities of Long-term Debt	Maturities of debt are as follows: ($ in thousands) Years Ending December 31, 2020 $ 1,750 2021 1,750 2022 106,466 2023 — 2024 — $ 109,966

Fair Value Measurements and F_2

Fair Value Measurements and Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Schedule Of Allowance For Doubtful Accounts	($ in thousands) 2019 2018 2017 Allowance for doubtful accounts, beginning of year $ — $ — $ 497 Bad debt expense: Provision for doubtful accounts 1,053 — — Write off of uncollectible accounts against reserve — — (497) Allowance for doubtful accounts, end of year $ 1,053 $ — $ —

Equity (Tables)

Equity (Tables)	12 Months Ended
	Dec. 31, 2019
Equity [Abstract]
Nonvested Restricted Stock Shares Activity	The following table summarizes the Company’s unvested restricted stock activity for the year ended December 31, 2019: Number of Shares Grant Date Fair Value per Share (1) Restricted Shares as of December 31, 2018 634,653 — Vested (366,448) — Forfeited — — Outstanding at December 31, 2019 268,205 $ — (1) As discussed above, the shares of restricted stock retain the grant date fair value of the Legacy Units.
Schedule of Nonvested Restricted Stock Units Activity	Changes in non-vested RSUs outstanding under the LTIP during the year ended December 31, 2019 were as follows: Number of Units Weighted Average Grant Date Fair Value per Unit Non-vested as of December 31, 2018 1,193,683 $ 19.24 Granted 899,696 15.08 Vested (327,799) 19.97 Forfeited (31,045) 17.78 Outstanding at December 31, 2019 1,734,535 $ 16.97
Schedule Of Performance Restricted Stock Units Activity	Changes in non-vested PSUs outstanding under the LTIP during the year ended December 31, 2019 were as follows: Number of Units Weighted Average Grant Date Fair Value per Unit Non-vested as of December 31, 2018 — $ — Granted 356,908 14.93 Vested — — Forfeited (27,631) 14.93 Outstanding at December 31, 2019 329,277 $ 14.93

Net Income per Share (Tables)

Net Income per Share (Tables)	12 Months Ended
	Dec. 31, 2019
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The following table reflects the allocation of net income to common stockholders and net income per share computations for the periods indicated based on a weighted average number of common stock outstanding for the period subsequent to the Corporate Reorganization on January 17, 2018: (In thousands, except per share data) Year Ended December 31, 2019 Year Ended December 31, 2018 Basic Net Income Per Share Numerator: Net income attributable to Liberty Oilfield Services Inc. Stockholders $ 39,003 $ 126,349 Denominator: Basic weighted average shares outstanding 72,334 68,838 Basic net income per share attributable to Liberty Oilfield Services Inc. Stockholders $ 0.54 $ 1.84 Diluted Net Income Per Share Numerator: Net income attributable to Liberty Oilfield Services Inc. Stockholders $ 39,003 $ 126,349 Effect of exchange of the shares of Class B Common stock for shares of Class A Common Stock 16,521 86,577 Diluted net income attributable to Liberty Oilfield Services Inc. Stockholders $ 55,524 $ 212,926 Denominator: Basic weighted average shares outstanding 72,334 68,838 Effect of dilutive securities: Restricted stock 512 906 Restricted stock units 1,771 602 Class B Common Stock 30,639 47,492 Diluted weighted average shares outstanding 105,256 117,838 Diluted net income per share attributable to Liberty Oilfield Services Inc. Stockholders $ 0.53 $ 1.81

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense (Benefit)	Income tax (benefit) expense reflected in the consolidated statement of operations consisted of: ($ in thousands) Year Ended December 31, 2019 Year Ended December 31, 2018 Current: Federal (9,907) 16,684 State 551 3,213 Total Current $ (9,356) $ 19,897 Deferred: Federal 23,419 19,063 State (11) 1,425 Total Deferred $ 23,408 $ 20,488 Income tax expense $ 14,052 $ 40,385
Schedule of Effective Income Tax Rate Reconciliation	A reconciliation of the statutory U.S. federal income tax rate of 21.0% to the Company ’ s effective income tax rate is as follows: ($ in thousands) Year Ended December 31, 2019 Year Ended December 31, 2018 Federal income tax expense at statutory rate $ 18,672 $ 60,778 State and local income tax expense, net 1,525 4,456 Pre-IPO income before income taxes attributable to the Predecessor — (1,958) Non-controlling interest (7,531) (24,606) Other 1,386 1,715 Total income tax expense $ 14,052 $ 40,385
Schedule of Deferred Tax Assets and Liabilities	The tax effects of temporary differences that give rise to the deferred tax assets and deferred tax liabilities are presented below: ($ in thousands) Year-Ended December 31, 2019 Year Ended December 31, 2018 Deferred tax assets: Federal net operating losses $ 10,486 $ 1,638 State net operating losses 925 160 Realized tax benefit - TRAs 48,575 15,845 Total deferred tax assets 59,986 17,643 Deferred tax liabilities: Investment in Liberty LLC $ 79,099 $ 50,325 Other 546 312 Total deferred tax liabilities 79,645 50,637 Net deferred tax liability $ 19,659 $ 32,994

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Other Commitments	Future proppant, transload, chemical and rail car commitments are as follows: Year ending December 31, 2020 $ 349,096 2021 139,937 2022 17,471 2023 12,598 2024 6,405 Thereafter — $ 525,507

Selected Quarterly Financial _2

Selected Quarterly Financial Data (unaudited) (Tables)	12 Months Ended
	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information	The following table sets forth certain unaudited financial and operating information for each quarter of the years ended December 31, 2019 and 2018. The unaudited quarterly information includes all adjustments that, in the opinion of management, are necessary for the fair presentation of information presented. Operating results for interim periods are not necessarily indicative of the results that may be expected for the full fiscal year. ($ in thousands) Year Ended December 31, 2019 Selected Financial Data: First Quarter Second Quarter Third Quarter Fourth Quarter Revenue $ 535,148 $ 542,147 $ 515,079 $ 397,971 Operating costs and expenses: Cost of services (exclusive of depreciation and amortization shown separately below) 429,299 426,444 421,007 344,430 General and administrative 22,088 23,989 25,302 26,210 Depreciation and amortization 38,387 40,368 42,324 44,299 Loss (gain) on disposal of assets 1,223 143 (124) 1,359 Total operating costs and expenses 490,997 490,944 488,509 416,298 Operating income (loss) 44,151 51,203 26,570 (18,327) Other expense: Interest expense, net 4,182 3,597 3,726 3,176 Net income (loss) before income taxes 39,969 47,606 22,844 (21,503) Income tax expense (benefit) 6,060 7,083 4,004 (3,095) Net income (loss) 33,909 40,523 18,840 (18,408) Less: Net income (loss) attributable to non-controlling interests 15,788 18,491 7,842 (6,260) Net income (loss) attributable to Liberty Oilfield Services Inc. stockholders $ 18,121 $ 22,032 $ 10,998 $ (12,148) Net income (loss) attributable to Liberty Oilfield Services Inc. stockholders per common share: Basic $ 0.27 $ 0.32 $ 0.15 $ (0.15) Diluted $ 0.26 $ 0.32 $ 0.15 $ (0.15) ($ in thousands) Year ended December 31, 2018 Selected Financial Data: First Quarter Second Quarter Third Quarter Fourth Quarter Revenue $ 495,160 $ 628,084 $ 558,777 $ 473,115 Operating costs and expenses: Cost of services (exclusive of depreciation and amortization shown separately below) 376,827 455,469 418,867 377,590 General and administrative 21,677 27,313 24,659 25,403 Depreciation and amortization 28,016 30,606 32,305 34,183 Loss (gain) on disposal of assets 80 485 701 (5,608) Total operating costs and expenses 426,600 513,873 476,532 431,568 Operating income 68,560 114,211 82,245 41,547 Other expense: Interest expense, net 6,494 3,540 3,648 3,463 Net income before income taxes 62,066 110,671 78,597 38,084 Income tax expense 8,079 15,930 12,229 4,147 Net income 53,987 94,741 66,368 33,937 Less: Net income attributable to Predecessor, prior to Corporate Reorganization 8,705 — — — Less: Net income attributable to non-controlling interests 21,607 45,146 32,275 14,951 Net income attributable to Liberty Oilfield Services Inc. stockholders $ 23,675 $ 49,595 $ 34,093 $ 18,986 Net income attributable to Liberty Oilfield Services Inc. stockholders per common share: Basic $ 0.34 $ 0.72 $ 0.50 $ 0.28 Diluted $ 0.34 $ 0.71 $ 0.49 $ 0.27

Organization and Basis of Pre_2

Organization and Basis of Presentation - Sale Of Stock (Details) - USD ($) $ / shares in Units, $ in Thousands	Jan. 17, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Subsidiary, Sale of Stock [Line Items]
Ownership interest redemption		$ 18,398	$ 82,903	$ 0
ABL Credit Facility
Subsidiary, Sale of Stock [Line Items]
Repayments of debt	$ 30,100
Term Loan Facility
Subsidiary, Sale of Stock [Line Items]
Repayments of debt	$ 62,500
Repayments of debt, percent	35.00%
Shares of Class A Common Stock
Subsidiary, Sale of Stock [Line Items]
Number of common shares sold (in shares)	55,685,027
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01	$ 0.01
Shares redeemed (in shares)	1,609,122
Shares of Class A Common Stock | IPO
Subsidiary, Sale of Stock [Line Items]
Number of common shares sold (in shares)	14,640,755
Price per share (in dollars per share)	$ 17
Consideration received	$ 220,000
Underwriting discounts and commissions	13,400
Other offering costs	$ 10,400
Shares of Class A Common Stock | IPO - Shares From Existing Shareholders
Subsidiary, Sale of Stock [Line Items]
Number of common shares sold (in shares)	300,541
Shares of Class B Common Stock
Subsidiary, Sale of Stock [Line Items]
Number of common shares sold (in shares)	48,207,372
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01	$ 0.01
Restricted Stock | Shares of Class A Common Stock
Subsidiary, Sale of Stock [Line Items]
Number of common shares sold (in shares)	1,258,514
Liberty LLC
Subsidiary, Sale of Stock [Line Items]
Ownership interest redemption	$ 25,900
Liberty Inc. | Shares of Class A Common Stock | IPO
Subsidiary, Sale of Stock [Line Items]
Number of common shares sold (in shares)	14,340,214
Liberty LLC | Liberty LLC
Subsidiary, Sale of Stock [Line Items]
Ownership percentage		72.80%	60.20%

Significant Accounting Polici_3

Significant Accounting Policies (Details)	Jan. 17, 2018agreement	Dec. 31, 2019USD ($)fleet	Dec. 31, 2018USD ($)fleet	Dec. 31, 2017USD ($)fleet	Jan. 01, 2019USD ($)
Deferred Revenue Arrangement [Line Items]
Finance lease right-of-use assets		$ 55,337,000	$ 0
Total		48,530,000
Operating lease right-of-use assets		53,076,000	0
Total		52,560,000
Deferred revenue		0	0
Prepayment revenue recognized			9,200,000
Start-up costs		$ 4,500,000	$ 10,100,000	$ 14,000,000
Number of fleets established | fleet		1	3	9
Number of tax receivable agreements | agreement	2
Accounting Standards Update 2016-02
Deferred Revenue Arrangement [Line Items]
Finance lease right-of-use assets					$ 57,200,000
Total					53,200,000
Operating lease right-of-use assets					64,000,000
Total					63,600,000
Accounting Standards Update 2016-02 | Prepaid Expenses and Other Current Assets
Deferred Revenue Arrangement [Line Items]
Cumulative effect of new accounting principle in period of adoption					1,900,000
Accounting Standards Update 2016-02 | Prepaid Expenses and Other Current Assets | Operating Lease
Deferred Revenue Arrangement [Line Items]
Cumulative effect of new accounting principle in period of adoption					2,100,000
Accounting Standards Update 2016-02 | Other Assets | Operating Lease
Deferred Revenue Arrangement [Line Items]
Cumulative effect of new accounting principle in period of adoption					2,000,000
Accounting Standards Update 2016-02 | Accrued Interest And Other Liabilities
Deferred Revenue Arrangement [Line Items]
Cumulative effect of new accounting principle in period of adoption					$ 1,500,000
Minimum
Deferred Revenue Arrangement [Line Items]
Customer payment terms		30 days
Maximum
Deferred Revenue Arrangement [Line Items]
Customer payment terms		45 days
Property and Equipment | Minimum
Deferred Revenue Arrangement [Line Items]
Estimated useful lives		2 years
Property and Equipment | Maximum
Deferred Revenue Arrangement [Line Items]
Estimated useful lives		30 years

Inventories (Details)

Inventories (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Inventory [Line Items]
Inventories	$ 88,547	$ 60,024
Inventory write down	1,953	3,389	$ 259
Proppants
Inventory [Line Items]
Inventories	14,013	22,038
Chemicals
Inventory [Line Items]
Inventories	10,076	10,781
Maintenance parts
Inventory [Line Items]
Inventories	$ 64,458	$ 27,205

Property and Equipment - Schedu

Property and Equipment - Schedule of PP&E (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,080,661	$ 877,625
Less accumulated depreciation and amortization	(455,687)	(307,277)
Property and equipment, before construction in-progress, net	624,974	570,348
Construction in-progress	26,729	56,705
Property and equipment, net	651,703	627,053
Depreciation expense	153,600	124,900	$ 81,500
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	5,400	5,400
Field services equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 978,418	778,423
Field services equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	2 years
Field services equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	7 years
Vehicles
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 60,290	59,807
Vehicles | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	4 years
Vehicles | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	7 years
Buildings and facilities
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 29,930	27,795
Buildings and facilities | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years
Buildings and facilities | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	30 years
Office equipment and furniture
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 6,623	$ 6,200
Office equipment and furniture | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	2 years
Office equipment and furniture | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	7 years

Property and Equipment - Accide

Property and Equipment - Accidental Fire (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Gain on disposal of assets	$ (1,359)	$ 124	$ (143)	$ (1,223)	$ 5,608	$ (701)	$ (485)	$ (80)	$ (2,601)	$ 4,342	$ (148)
Accidental Fire | Field services equipment
Property, Plant and Equipment [Line Items]
Accrued insurance proceeds					$ 15,700					15,700
Impairment loss										4,300
Gain on disposal of assets										$ 11,500

Leases - Lease Cost (Details)

Leases - Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Amortization of right-of-use assets	$ 10,256
Interest on lease liabilities	2,652
Operating lease cost	20,731
Variable lease cost	3,118
Total lease cost	36,757
Operating Lease, Expense	40,900	$ 20,800
Operating lease, residual value of leased asset	$ 2,900

Leases - Supplemental Cash Flow

Leases - Supplemental Cash Flows (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)
Cash paid for amounts included in measurement of liabilities:
Operating leases	$ 20,849
Finance leases	14,795
Right-of-use assets upon adoption of ASC 842 and obtained in exchange for new lease liabilities:
Operating leases	70,611
Finance leases	$ 65,333

Leases - Lease Term And Discoun

Leases - Lease Term And Discount Rates (Details)	Dec. 31, 2019
Leases [Abstract]
Operating leases	6 years 4 months 24 days
Finance leases	1 year 3 months 18 days
Operating leases	5.40%
Finance leases	5.20%

Leases - Finance and Operating

Leases - Finance and Operating Leases Maturity (Details) $ in Thousands	Dec. 31, 2019USD ($)
Finance
2020	$ 26,407
2021	20,626
2022	4,135
2023	0
2024	0
Thereafter	0
Total lease payments	51,168
Less imputed interest	(2,638)
Total	48,530
Operating
2020	18,262
2021	13,696
2022	7,249
2023	4,365
2024	3,646
Thereafter	16,017
Total lease payments	63,235
Less imputed interest	(10,675)
Total	$ 52,560

- Operating Lease Future Minimu

- Operating Lease Future Minimum Payments (Details) $ in Thousands	Dec. 31, 2018USD ($)
Leases [Abstract]
2019	$ 42,717
2020	48,685
2021	32,390
2022	6,093
2023	4,303
Thereafter	19,742
Future minimum payments due	$ 153,930

Debt - Summary of Debt (Details

Debt - Summary of Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Long-term debt, gross	$ 109,966
Deferred financing costs and original issue discount	(3,826)	$ (5,191)
Total debt, net of deferred financing costs and original issue discount	106,140	106,524
Current portion of long-term debt, net of discount	409	385
Long-term debt, net of discount and current portion	105,731	106,139
Term Loan Outstanding
Debt Instrument [Line Items]
Long-term debt, gross	109,966	111,715
Revolving Line of Credit
Debt Instrument [Line Items]
Long-term debt, gross	$ 0	$ 0

Debt - Credit Facilities (Detai

Debt - Credit Facilities (Details)	12 Months Ended
	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Sep. 19, 2017USD ($)agreement
Debt Instrument [Line Items]
Long-term debt, gross	$ 109,966,000
Revolving Line of Credit
Debt Instrument [Line Items]
Long-term debt, gross	0	$ 0
Revolving Credit Facility
Debt Instrument [Line Items]
Number of credit agreements | agreement			2
Revolving Credit Facility | ABL Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 250,000,000
Revolving Credit Facility | Revolving Line of Credit | ABL Credit Facility
Debt Instrument [Line Items]
Current borrowing capacity	$ 171,100,000
Line of credit, maturity, number of days prior maturity of another facility	90 days
Revolving Credit Facility | Revolving Line of Credit | Term Loan Facility
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 175,000,000
Long-term debt, gross	$ 110,000,000
Weighted average interest rate	9.40%
Line of credit facility, outstanding balance, quarterly principal payments, percent	1.00%
Letter of Credit | ABL Credit Facility
Debt Instrument [Line Items]
Letters of credit outstanding, amount	$ 300,000
Remaining borrowing capacity	$ 170,800,000
Minimum | Revolving Credit Facility | Revolving Line of Credit | ABL Credit Facility
Debt Instrument [Line Items]
Unused capacity, commitment fee percentage	0.375%
Maximum | Revolving Credit Facility | Revolving Line of Credit | ABL Credit Facility
Debt Instrument [Line Items]
Unused capacity, commitment fee percentage	0.50%
London Interbank Offered Rate (LIBOR) | Revolving Credit Facility | Revolving Line of Credit | Term Loan Facility
Debt Instrument [Line Items]
Basis spread on variable rate	7.625%
London Interbank Offered Rate (LIBOR) | Minimum | Revolving Credit Facility | Revolving Line of Credit | ABL Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate	1.50%
London Interbank Offered Rate (LIBOR) | Maximum | Revolving Credit Facility | Revolving Line of Credit | ABL Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
Base Rate | Revolving Credit Facility | Revolving Line of Credit | Term Loan Facility
Debt Instrument [Line Items]
Basis spread on variable rate	6.625%
Base Rate | Minimum | Revolving Credit Facility | Revolving Line of Credit | ABL Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%
Base Rate | Maximum | Revolving Credit Facility | Revolving Line of Credit | ABL Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate	1.00%

Debt - Term Loan Facility (Deta

Debt - Term Loan Facility (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Sep. 19, 2017
Debt Instrument [Line Items]
Long-term debt, gross	$ 109,966,000
Revolving Line of Credit
Debt Instrument [Line Items]
Long-term debt, gross	0	$ 0
Revolving Credit Facility | ABL Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 250,000,000
Revolving Credit Facility | Revolving Line of Credit | Term Loan Facility
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 175,000,000
Long-term debt, gross	$ 110,000,000
Weighted average interest rate	9.40%
Line of credit facility, outstanding balance, quarterly principal payments, percent	1.00%
Line of credit facility, covenant compliance, fixed charge coverage ratio	1.2
Line of credit facility, covenant compliance, excess availability threshold, amount	$ 25,000,000
Line of credit facility, covenant compliance, prepayment minimum, percent	3.00%
Line of credit facility, covenant compliance, prepayment minimum, floor during first three years, percent	1.00%
Revolving Credit Facility | Revolving Line of Credit | Term Loan Facility | Minimum
Debt Instrument [Line Items]
Line of credit facility, covenant compliance, annual percentage of excess cash flow	25.00%
Revolving Credit Facility | Revolving Line of Credit | Term Loan Facility | Maximum
Debt Instrument [Line Items]
Line of credit facility, covenant compliance, annual percentage of excess cash flow	50.00%
Revolving Credit Facility | Revolving Line of Credit | ABL Credit Facility
Debt Instrument [Line Items]
Line of credit facility, covenant compliance, fixed charge coverage ratio	1
Line of credit facility, covenant compliance, excess availability threshold, percent of borrowing base	10.00%
Line of credit facility, covenant compliance, excess availability threshold, amount	$ 12,500,000

Debt - Maturities of Debt (Deta

Debt - Maturities of Debt (Details) $ in Thousands	Dec. 31, 2019USD ($)
Debt Disclosure [Abstract]
2020	$ 1,750
2021	1,750
2022	106,466
2023	0
2024	0
Total debt	$ 109,966

Fair Value Measurements and F_3

Fair Value Measurements and Financial Instruments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents measured at fair value	$ 86,900	$ 0
Cash balances on deposit with financial institutions	$ 112,690	103,312
Customer payment terms, period	45 days
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for doubtful accounts, beginning of year	$ 0	0	$ 497
Bad debt expense:
Provision for doubtful accounts	1,053	0	0
Write off of uncollectible accounts against reserve	0	0	(497)
Allowance for doubtful accounts, end of year	1,053	0	$ 0
Liberty Resources LLC | Hydraulic Fracturing Services | Affiliated Entity
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Due from related parties	$ 2,500	$ 0
Customer Concentration Risk | Largest Customer | Accounts Receivable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage	12.00%
Customer Concentration Risk | Largest Customer | Total Revenue
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage	10.00%	11.00%
Customer Concentration Risk | Largest Two Customers | Accounts Receivable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage		28.00%
Customer Concentration Risk | Largest Two Customers | Total Revenue
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Concentration risk, percentage			36.00%

Equity - Additional Information

Equity - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	Jan. 17, 2018	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Jan. 11, 2018
Subsidiary or Equity Method Investee [Line Items]
Preferred stock, shares authorized (in shares)			10,000	10,000
Preferred stock, par value (in dollars per share)			$ 0.01	$ 0.01
Total member contributions		$ 275.7
Shares of Class A Common Stock
Subsidiary or Equity Method Investee [Line Items]
Common stock, shares outstanding (in shares)			81,885,384	68,359,871
Number of common shares sold (in shares)	55,685,027
Shares of Class A Common Stock | Long Term Incentive Plan
Subsidiary or Equity Method Investee [Line Items]
Shares reserved for issuance					12,908,734
Shares of Class A Common Stock | Restricted Stock
Subsidiary or Equity Method Investee [Line Items]
Common stock, shares outstanding (in shares)			268,205	634,653
Number of common shares sold (in shares)	1,258,514
Shares of Class B Common Stock
Subsidiary or Equity Method Investee [Line Items]
Common stock, shares outstanding (in shares)			30,638,960	45,207,372
Number of common shares sold (in shares)	48,207,372

Equity - Restricted Stock Award

Equity - Restricted Stock Awards and Restricted Stock Units (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Vesting period of awards	5 years
Share-based compensation expense	$ 13.6	$ 5.4
Unamortized compensation expense	$ 21.9
Weighted average remaining vesting period	1 year 9 months 18 days
Performance Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding at beginning of period (in shares)	0
Granted (in shares)	356,908
Vested (in shares)	0
Forfeited (in shares)	(27,631)
Outstanding at end of period (in shares)	329,277	0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Outstanding at beginning of period (in dollars per share)	$ 0
Granted (in dollars per share)	14.93
Vested (in dollars per share)	0
Forfeited (in dollars per share)	14.93
Outstanding at end of period (in dollars per share)	$ 14.93	$ 0
Vesting period of awards	3 years
Shares of Class A Common Stock | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Vested (in shares)	(366,448)
Forfeited (in shares)	0
Outstanding at end of period (in shares)	268,205
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Outstanding at beginning of period (in dollars per share)	$ 0
Vested (in dollars per share)	0
Forfeited (in dollars per share)	0
Outstanding at end of period (in dollars per share)	$ 0	$ 0
Shares of Class A Common Stock | Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding at beginning of period (in shares)	1,193,683
Granted (in shares)	899,696
Vested (in shares)	(327,799)
Forfeited (in shares)	(31,045)
Outstanding at end of period (in shares)	1,734,535	1,193,683
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Outstanding at beginning of period (in dollars per share)	$ 19.24
Granted (in dollars per share)	15.08
Vested (in dollars per share)	19.97
Forfeited (in dollars per share)	17.78
Outstanding at end of period (in dollars per share)	$ 16.97	$ 19.24

Equity - Dividends and Repurcha

Equity - Dividends and Repurchase of Common Stock (Details) - USD ($)	1 Months Ended	3 Months Ended	12 Months Ended
	Jan. 31, 2019	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Jan. 22, 2019	Sep. 10, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, dividends, per share, declared (in dollars per share)			$ 0.20
Shares of Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchase program, authorized amount					$ 100,000,000
Shares of Class A Common Stock | Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends, common stock, cash			$ 14,700,000	$ 7,000,000
Common stock, dividends, per share, declared (in dollars per share)			$ 0.05	$ 0.05
Stock repurchase program, authorized amount						$ 100,000,000
Treasury stock, shares, retired (in shares)		1,303,003		4,593,855
Treasury stock, retired, amount		$ 18,400,000		$ 82,900,000
Remaining authorized repurchase amount		$ 98,700,000	$ 98,700,000	$ 17,100,000
Treasury stock acquired, average cost per share (in dollars per share)		$ 14.66		$ 18.05
Par value reduction (in dollars per share)			$ 0.01
Liberty LLC | LLC Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends, common stock, cash			$ 22,500,000	$ 11,600,000
Treasury stock, shares, retired (in shares)		1,303,003		4,593,855
Treasury stock, retired, amount		$ 18,400,000		$ 82,900,000
Restricted Stock and Restricted Stock Units (RSUs) | Shares of Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends, common stock, cash			$ 500,000	$ 200,000
Riverstone | Affiliated Entity | Shares of Class A Common Stock | Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Treasury stock, shares, retired (in shares)	117,647			2,491,160
Treasury stock acquired, average cost per share (in dollars per share)		$ 14.66	$ 17	$ 18.96

Net Income per Share (Details)

Net Income per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	1 Months Ended	3 Months Ended								12 Months Ended
	Jan. 17, 2018	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Numerator:
Net income attributable to Liberty Oilfield Services Inc. Stockholders	$ 8,705	$ (12,148)	$ 10,998	$ 22,032	$ 18,121	$ 18,986	$ 34,093	$ 49,595	$ 23,675	$ 39,003	$ 126,349	$ 0
Denominator:
Basic weighted average shares outstanding (in shares)										72,334	68,838
Basic net income per share attributable to Liberty Oilfield Services Inc. Stockholders (in dollars per share)		$ (0.15)	$ 0.15	$ 0.32	$ 0.27	$ 0.28	$ 0.50	$ 0.72	$ 0.34	$ 0.54	$ 1.84
Numerator:
Net income attributable to Liberty Oilfield Services Inc. Stockholders	$ 8,705	$ (12,148)	$ 10,998	$ 22,032	$ 18,121	$ 18,986	$ 34,093	$ 49,595	$ 23,675	$ 39,003	$ 126,349	$ 0
Effect of exchange of the shares of Class B Common stock for shares of Class A Common Stock										16,521	86,577
Diluted net income attributable to Liberty Oilfield Services Inc. Stockholders										$ 55,524	$ 212,926
Denominator:
Basic weighted average shares outstanding (in shares)										72,334	68,838
Effect of dilutive securities:
Restricted stock (in shares)										512	906
Restricted stock units (in shares)										1,771	602
Class B Common Stock (in shares)										30,639	47,492
Diluted weighted average shares outstanding (in shares)										105,256	117,838
Diluted net income per share attributable to Liberty Oilfield Services Inc. Stockholders (in dollars per share)		$ (0.15)	$ 0.15	$ 0.32	$ 0.26	$ 0.27	$ 0.49	$ 0.71	$ 0.34	$ 0.53	$ 1.81

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended								11 Months Ended	12 Months Ended			23 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019
Operating Loss Carryforwards [Line Items]
Effective combined income tax rate													15.80%
Income tax expense	$ (3,095)	$ 4,004	$ 7,083	$ 6,060	$ 4,147	$ 12,229	$ 15,930	$ 8,079		$ 14,052	$ 40,385	$ 0
Non-controlling interest										(7,531)	(24,606)
Net deferred tax liability due to Corporate Reorganization									$ (29,287)
Taxes payable, noncurrent	48,481				16,818				16,818	48,481	16,818		$ 48,481
Federal
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, expiring in 2027	3,700									3,700			3,700
Operating loss carryforwards, not subject to expiration	44,300									44,300			44,300
Non-controlling Interest
Operating Loss Carryforwards [Line Items]
Tax distributions											21,300
Additional Paid in Capital
Operating Loss Carryforwards [Line Items]
Net deferred tax liability due to Corporate Reorganization									(29,287)	(29,300)
R/C IV Non-U.S. LOS Corp | Federal
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	10,900									10,900			10,900
R/C IV Non-U.S. LOS Corp | State
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	10,900									10,900			10,900
Tax Receivable Agreement
Operating Loss Carryforwards [Line Items]
Deferred tax asset	49,900				19,700				19,700	49,900	19,700		49,900
Taxes payable	50,300				16,800				16,800	50,300	16,800		50,300
Taxes payable, current	1,800									1,800			1,800
Taxes payable, noncurrent	48,500									48,500			48,500
Tax Receivable Agreement | R/C IV Non-U.S. LOS Corp
Operating Loss Carryforwards [Line Items]
Deferred tax asset	2,600									2,600			2,600
Taxes payable	2,300									2,300			2,300
Shares of Class B Common Stock | Tax Receivable Agreement | Common Stock
Operating Loss Carryforwards [Line Items]
Deferred tax asset	40,000				17,100				17,100	40,000	17,100		40,000
Taxes payable	$ 34,000				$ 14,500				$ 14,500	$ 34,000	$ 14,500		$ 34,000

Income Taxes - Benefit (Provisi

Income Taxes - Benefit (Provision) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal									$ (9,907)	$ 16,684
State									551	3,213
Total Current									(9,356)	19,897
Deferred:
Federal									23,419	19,063
State									(11)	1,425
Total Deferred									23,408	20,488	$ 0
Income tax expense	$ (3,095)	$ 4,004	$ 7,083	$ 6,060	$ 4,147	$ 12,229	$ 15,930	$ 8,079	$ 14,052	$ 40,385	$ 0

Income Taxes - Effective Income

Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Federal income tax expense at statutory rate									$ 18,672	$ 60,778
State and local income tax expense, net									1,525	4,456
Pre-IPO income before income taxes attributable to the Predecessor									0	(1,958)
Non-controlling interest									(7,531)	(24,606)
Other									1,386	1,715
Income tax expense	$ (3,095)	$ 4,004	$ 7,083	$ 6,060	$ 4,147	$ 12,229	$ 15,930	$ 8,079	$ 14,052	$ 40,385	$ 0

Income Taxes - Deferred Tax Ass

Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Federal net operating losses	$ 10,486	$ 1,638
State net operating losses	925	160
Realized tax benefit - TRAs	48,575	15,845
Total deferred tax assets	59,986	17,643
Deferred tax liabilities:
Investment in Liberty LLC	79,099	50,325
Other	546	312
Total deferred tax liabilities	79,645	50,637
Net deferred tax liability	$ 19,659	$ 32,994

Defined Contribution Plan (Deta

Defined Contribution Plan (Details) - 401(k) Defined Contribution Retirement Plan - USD ($)	6 Months Ended	12 Months Ended			27 Months Ended
	Sep. 30, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019
Defined Contribution Plan Disclosure [Line Items]
Employer matching contribution per one dollar of employee contribution		$ 1
Maximum annual contribution per employee, percent	3.00%				6.00%
Contributions made by the employer		$ 15,700,000	$ 13,800,000	$ 5,100,000

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($)	Jan. 17, 2018	Jan. 11, 2018	Jan. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jun. 24, 2019
Related Party Transaction [Line Items]
Payable to related parties				$ 1,329,000	$ 0	$ 1,329,000	$ 0
Accrued income taxes, related parties, noncurrent				23,800,000	2,900,000	23,800,000	2,900,000
Revenue from related parties						18,273,000	23,104,000	$ 24,722,000
Accrued liabilities—related party				0	2,300,000	0	2,300,000
Tax Receivable Agreement
Related Party Transaction [Line Items]
Payable pursuant to tax receivable agreements				50,300,000	16,800,000	50,300,000	16,800,000
Affiliated Entity | Equity Transaction
Related Party Transaction [Line Items]
Asset contribution, corporate reorganization	$ 2,100,000
Consideration received	42,600,000
Liberty Resources LLC | Affiliated Entity | Hydraulic Fracturing Services
Related Party Transaction [Line Items]
Expenses from transactions with related party				0			200,000	0
Revenue from related parties				18,300,000
Accounts receivable, related parties				7,100,000	15,100,000	7,100,000	15,100,000
Notes receivable - related party, less current portion									$ 15,600,000
Due from related parties				2,500,000	0	$ 2,500,000	0
Receivable with imputed interest, effective yield (interest rate)						13.00%
Interest income, related party						$ 1,800,000
Accrued interest receivable, related party				0		0
Riverstone | Affiliated Entity | Service Fees
Related Party Transaction [Line Items]
Expenses from transactions with related party				0			0	1,500,000
Accrued liabilities—related party				2,300,000	2,000,000	2,300,000	2,000,000
Interest and settlement expense						300,000
Proppant Express Investments, LLC | Affiliated Entity | Administrative Support and Purchase and Lease Proppant Logistics Equipment
Related Party Transaction [Line Items]
Accounts receivable, related parties				0	0	0	0
Due to related parties				800,000	$ 200,000	800,000	200,000
Purchases from related party				0			3,100,000
Leases from related party				9,800,000			$ 4,400,000	$ 3,700,000
R/C IV Non-U.S. LOS Corp | Affiliated Entity | Tax Receivable Agreement
Related Party Transaction [Line Items]
Payable pursuant to tax receivable agreements		$ 2,900,000
Shares of Class B Common Stock | R/C IV Non-U.S. LOS Corp | Affiliated Entity | Tax Receivable Agreement
Related Party Transaction [Line Items]
Payable pursuant to tax receivable agreements				$ 22,300,000		$ 22,300,000
Redemption of stock (in shares)						9,605,786
Common Stock | Shares of Class A Common Stock
Related Party Transaction [Line Items]
Redemption of stock (in shares)					1,609,000
Treasury stock, shares, retired (in shares)				1,303,003			4,593,855
Treasury stock acquired, average cost per share (in dollars per share)				$ 14.66			$ 18.05
Common Stock | Shares of Class A Common Stock | Riverstone | Affiliated Entity
Related Party Transaction [Line Items]
Treasury stock, shares, retired (in shares)			117,647				2,491,160
Treasury stock acquired, average cost per share (in dollars per share)				$ 14.66		$ 17	$ 18.96
Common Stock | Shares of Class B Common Stock | Tax Receivable Agreement
Related Party Transaction [Line Items]
Payable pursuant to tax receivable agreements				$ 34,000,000	$ 14,500,000	$ 34,000,000	$ 14,500,000
IPO | Shares of Class A Common Stock
Related Party Transaction [Line Items]
Consideration received	$ 220,000,000
IPO | Common Stock | Shares of Class A Common Stock | Riverstone | Affiliated Entity | Service Fees
Related Party Transaction [Line Items]
Number of shares given to related party (in shares)		117,647

Commitments and Contingencies -

Commitments and Contingencies - Proppant, Transload, Chemical and Rail Car Commitments (Details) $ in Thousands	Dec. 31, 2019USD ($)
Commitments and Contingencies Disclosure [Abstract]
2020	$ 349,096
2021	139,937
2022	17,471
2023	12,598
2024	6,405
Thereafter	0
Other commitment	$ 525,507

Commitments and Contingencies_2

Commitments and Contingencies - Additional Information (Details)	12 Months Ended
	Dec. 31, 2019Tgal	Dec. 31, 2018Tgal
Proppant
Long-term Purchase Commitment [Line Items]
Minimum mass required (in tons) | T	7,978,300	11,266,000
Chemicals
Long-term Purchase Commitment [Line Items]
Minimum volume required | gal	3,339,534	18,852,000

Selected Quarterly Financial _3

Selected Quarterly Financial Data (unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended								12 Months Ended
	Jan. 17, 2018	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Revenue		$ 397,971	$ 515,079	$ 542,147	$ 535,148	$ 473,115	$ 558,777	$ 628,084	$ 495,160	$ 1,990,346	$ 2,155,136	$ 1,489,855
Operating costs and expenses:
Cost of services (exclusive of depreciation and amortization shown separately below)		344,430	421,007	426,444	429,299	377,590	418,867	455,469	376,827	1,621,180	1,628,753	1,147,008
General and administrative		26,210	25,302	23,989	22,088	25,403	24,659	27,313	21,677	97,589	99,052	80,089
Depreciation and amortization		44,299	42,324	40,368	38,387	34,183	32,305	30,606	28,016	165,379	125,110	81,473
Loss (gain) on disposal of assets		1,359	(124)	143	1,223	(5,608)	701	485	80	2,601	(4,342)	148
Total operating costs and expenses		416,298	488,509	490,944	490,997	431,568	476,532	513,873	426,600	1,886,749	1,848,573	1,308,718
Operating income		(18,327)	26,570	51,203	44,151	41,547	82,245	114,211	68,560	103,597	306,563	181,137
Other expense:
Interest expense, net		3,176	3,726	3,597	4,182	3,463	3,648	3,540	6,494	14,681	17,145	12,636
Net income before income taxes		(21,503)	22,844	47,606	39,969	38,084	78,597	110,671	62,066	88,916	289,418	168,501
Income tax expense		(3,095)	4,004	7,083	6,060	4,147	12,229	15,930	8,079	14,052	40,385	0
Net income		(18,408)	18,840	40,523	33,909	33,937	66,368	94,741	53,987	74,864	249,033	168,501
Less: Net income attributable to Predecessor, prior to Corporate Reorganization						0	0	0	8,705	0	8,705	168,501
Less: Net income attributable to non-controlling interests		(6,260)	7,842	18,491	15,788	14,951	32,275	45,146	21,607	35,861	113,979	0
Net income attributable to Liberty Oilfield Services Inc. stockholders	$ 8,705	$ (12,148)	$ 10,998	$ 22,032	$ 18,121	$ 18,986	$ 34,093	$ 49,595	$ 23,675	$ 39,003	$ 126,349	$ 0
Net income attributable to Liberty Oilfield Services Inc. stockholders per common share:
Basic (in dollars per share)		$ (0.15)	$ 0.15	$ 0.32	$ 0.27	$ 0.28	$ 0.50	$ 0.72	$ 0.34	$ 0.54	$ 1.84
Diluted (in dollars per share)		$ (0.15)	$ 0.15	$ 0.32	$ 0.26	$ 0.27	$ 0.49	$ 0.71	$ 0.34	$ 0.53	$ 1.81

Subsequent Events (Details)

Subsequent Events (Details) - $ / shares	Jan. 22, 2020	Dec. 31, 2019	Dec. 31, 2018
Subsequent Event [Line Items]
Common stock, dividends, per share, declared (in dollars per share)		$ 0.20
Shares of Class A Common Stock | LLC Units | Subsequent Event
Subsequent Event [Line Items]
Common stock, dividends, per share, declared (in dollars per share)	$ 0.05
Shares of Class A Common Stock | Common Stock
Subsequent Event [Line Items]
Common stock, dividends, per share, declared (in dollars per share)		$ 0.05	$ 0.05
Shares of Class A Common Stock | Common Stock | Subsequent Event
Subsequent Event [Line Items]
Common stock, dividends, per share, declared (in dollars per share)	$ 0.05