Primoris Services (PRIM) 10-Q 6 May 14 2014 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2014	5-May-14
Document and Entity Information	'	'
Entity Registrant Name	'Primoris Services Corp	'
Entity Central Index Key	'0001361538	'
Document Type	'10-Q	'
Document Period End Date	31-Mar-14	'
Amendment Flag	'false	'
Current Fiscal Year End Date	'--12-31	'
Entity Current Reporting Status	'Yes	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	51,655,224
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q1	'

CONDENSED_CONSOLIDATED_BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$149,620	$196,077
Short-term investments	17,326	18,686
Customer retention deposits and restricted cash	55	5,304
Accounts receivable, net	289,124	304,955
Costs and estimated earnings in excess of billings	75,067	57,146
Inventory and uninstalled contract materials	58,681	51,829
Deferred tax assets	13,133	13,133
Prepaid expenses and other current assets	12,610	12,654
Total current assets	615,616	659,784
Property and equipment, net	228,834	226,512
Intangible assets, net	43,460	45,303
Goodwill	118,626	118,626
Other long-term assets	416	468
Total assets	1,006,952	1,050,693
Current liabilities:	'	'
Accounts payable	119,089	127,302
Billings in excess of costs and estimated earnings	147,301	173,365
Accrued expenses and other current liabilities	91,559	91,079
Dividends payable	1,808	1,805
Current portion of capital leases	2,681	3,288
Current portion of long-term debt	27,559	28,475
Current portion of contingent earnout liabilities	4,347	5,000
Total current liabilities	394,344	430,314
Long-term capital leases, net of current portion	1,823	2,295
Long-term debt, net of current portion	180,653	191,051
Deferred tax liabilities	10,092	10,092
Long-term contingent earnout liabilities, net of current portion	'	4,233
Other long-term liabilities	10,405	14,260
Total liabilities	597,317	652,245
Commitments and contingencies	'	'
Stockholders' equity	'	'
Common stock-$.0001 par value, 90,000,000 shares authorized, 51,655,224 and 51,571,394 issued and outstanding at March 31, 2014 and December 31, 2013	5	5
Additional paid-in capital	162,050	159,196
Retained earnings	247,242	238,216
Noncontrolling interests	338	1,031
Total stockholders' equity	409,635	398,448
Total liabilities and stockholders' equity	$1,006,952	$1,050,693

CONDENSED_CONSOLIDATED_BALANCE1

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Mar. 31, 2014	Dec. 31, 2013
CONDENSED CONSOLIDATED BALANCE SHEETS	'	'
Common stock, par value (in dollars per share)	$0.00	$0.00
Common stock, shares authorized	90,000,000	90,000,000
Common stock, shares issued	51,655,224	51,571,394
Common stock, shares outstanding	51,655,224	51,571,394

CONDENSED_CONSOLIDATED_STATEME

CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
CONDENSED CONSOLIDATED STATEMENTS OF INCOME	'	'
Revenues	$470,074	$409,995
Cost of revenues	420,317	363,899
Gross profit	49,757	46,096
Selling, general and administrative expenses	29,712	28,619
Operating income	20,045	17,477
Other income (expense):	'	'
Income from non-consolidated entities	14	269
Foreign exchange gain (loss)	26	-59
Other expense	-114	-56
Interest income	52	40
Interest expense	-1,668	-1,424
Income before provision for income taxes	18,355	16,247
Provision for income taxes	-7,090	-6,207
Net income	11,265	10,040
Less net income attributable to noncontrolling interests	-432	-270
Net income attributable to Primoris	$10,833	$9,770
Earnings per share:	'	'
Basic (in dollars per share)	$0.21	$0.19
Diluted (in dollars per share)	$0.21	$0.19
Weighted average common shares outstanding:	'	'
Basic (in shares)	51,610	51,456
Diluted (in shares)	51,714	51,467

CONDENSED_CONSOLIDATED_STATEME1

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities:	'	'
Net income	$11,265	$10,040
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Depreciation	11,709	9,490
Amortization of intangible assets	1,843	1,794
Loss (gain) on sale of property and equipment	-355	48
Income from non-consolidated entities	-14	-269
Stock-based compensation expense	137	'
Changes in assets and liabilities:	'	'
Customer retention deposits and restricted cash	5,249	8,006
Accounts receivable	15,831	18,174
Costs and estimated earnings in excess of billings	-17,921	-6,463
Other current assets	-7,938	-232
Other long-term assets	'	-381
Accounts payable	-8,213	-46,557
Billings in excess of costs and estimated earnings	-26,064	2,052
Contingent earnout liabilities	-4,886	356
Accrued expenses and other current liabilities	1,534	-99
Other long-term liabilities	-3,855	-3,240
Net cash used in operating activities	-21,678	-7,281
Cash flows from investing activities:	'	'
Purchase of property and equipment	-15,067	-19,550
Proceeds from sale of property and equipment	1,391	1,222
Purchase of short-term investments	-586	-2,939
Sale of short-term investments	1,946	3,201
Cash received for the sale of Alvah minority interest	1,189	'
Cash paid for acquisitions	'	-1,025
Net cash used in investing activities	-11,127	-19,091
Cash flows from financing activities:	'	'
Proceeds from issuance of long-term debt	'	16,116
Repayment of capital leases	-1,079	-1,002
Repayment of long-term debt	-11,314	-6,221
Proceeds from issuance of common stock purchased under a long-term incentive plan	1,671	1,455
Dividends paid	-1,805	'
Cash distribution to non-controlling interest holder	-1,125	'
Net cash provided by (used in) financing activities	-13,652	10,348
Net change in cash and cash equivalents	-46,457	-16,024
Cash and cash equivalents at beginning of the period	196,077	157,551
Cash and cash equivalents at end of the period	149,620	141,527
Cash paid during the period for:	'	'
Interest	1,508	1,259
Income taxes, net of refunds received	2,341	802
SUPPLEMENTAL DISCLOSURES OF NONCASH INVESTING AND FINANCING ACTIVITIES	'	'
Obligations incurred for the acquisition of property and equipment	'	1,180
Dividends declared and not yet paid	$1,808	$1,547

Nature_of_Business

Nature of Business	3 Months Ended
	Mar. 31, 2014
Nature of Business	'
Nature of Business	'
	Note 1—Nature of Business
	Organization and operations— Primoris Services Corporation is a holding company of various construction and product engineering subsidiaries. The Company’s underground and directional drilling operations install, replace and repair natural gas, petroleum, telecommunications and water pipeline systems, including large diameter pipeline systems. The Company’s industrial, civil and engineering operations build and provide maintenance services to industrial facilities including power plants, petrochemical facilities, and other processing plants; construct multi-level parking structures; and engage in the construction of highways, bridges and other environmental construction activities. The Company is incorporated in the State of Delaware, and its corporate headquarters are located at 2100 McKinney Avenue, Suite 1500, Dallas, Texas 75201.
	The following table lists the Company’s primary operating subsidiaries and their reportable operating segment:
	Subsidiary	Operating Segment
	ARB, Inc. (“ARB”)	West Construction Services
	ARB Structures, Inc.	West Construction Services
	Q3 Contracting, Inc. (“Q3C”); acquired 2012	West Construction Services
	Rockford Corporation (“Rockford”)	West Construction Services
	Stellaris, LLC.	West Construction Services
	OnQuest, Inc.	Engineering
	OnQuest, Canada, ULC (Born Heaters Canada, ULC prior to 2013)	Engineering
	Cardinal Contractors, Inc.	East Construction Services
	James Construction Group, LLC (“JCG”)	East Construction Services
	Silva Group (“Silva”); acquired 2012	East Construction Services
	Primoris Energy Services Corporation (“PES”)	East Construction Services
	Sprint Pipeline Services, L.P. (“Sprint”) was purchased by PES in 2012.  PES has operated using the Sprint name as a DBA during 2012 and 2013.  PES acquired two subsidiaries, The Saxon Group (“Saxon”) in 2012 and Force Specialty Services, Inc. (“FSSI”) in 2013. On January 1, 2014, the two subsidiaries were merged into PES.  Additionally, the Industrial division of JCG was merged into PES.  In this Quarterly Report on Form 10-Q for the three months ended March 31, 2014 (the “First Quarter 2014 Report), references to Sprint, FSSI, Saxon and James Industrial are to the divisions of PES, while the references are to the entities or divisions for periods prior to 2014.
	The Company owns 50% of the Blythe Power Constructors joint venture (“Blythe”) for the installation of a parabolic trough solar field and steam generation system in California and its operations are included as part of the West Construction Services segment.
	In January 2014, the Company created a wholly owned subsidiary, BW Primoris, LLC, a Texas limited liability company (“BWP”).  BWP’s goal is to develop water projects, primarily in Texas, that will need the Company’s construction services to construct a water treatment system and pipeline.  On January 22, 2014, BWP entered into an agreement to purchase the assets of Blaus Wasser, LLC, a Wyoming limited liability company for approximately $5 million.  During the 2014 first quarter, BWP entered into an intercompany construction contract with Cardinal Contractors, Inc. to build a small water treatment facility in West Texas; intercompany revenue and profit of the project is eliminated in consolidation.
	Unless specifically noted otherwise, as used throughout these consolidated financial statements, “Primoris”, “the Company”, “we”, “our”, “us” or “its” refers to the business, operations and financial results of the Company and its wholly-owned subsidiaries.

Basis_of_Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2014
Basis of Presentation	'
Basis of Presentation	'
	Note 2—Basis of Presentation
	Interim consolidated financial statements— The interim condensed consolidated financial statements for the three-month period ended March 31, 2014 and 2013 have been prepared in accordance with Rule 10-01 of Regulation S-X of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). As such, certain disclosures, which would substantially duplicate the disclosures contained in the Company’s Annual Report on Form 10-K, filed on March 3, 2014, which contains the Company’s audited consolidated financial statements for the year ended December 31, 2013, have been omitted.
	This First Quarter 2014 Report should be read in concert with the Company’s most recent Annual Report on Form 10-K.  The interim financial information is unaudited.  In the opinion of management, the interim information includes all adjustments (consisting of normal recurring adjustments) necessary for the fair presentation of the interim financial information.
	Revenue recognition
	Fixed-price contracts — Historically, a substantial portion of the Company’s revenue has been generated under fixed-price contracts. Fixed price contracts generally provide that the Company will perform all of the work required by the contract for a stated price.  For fixed-price contracts, the Company recognizes revenues using the percentage-of-completion method, which may result in uneven and irregular results. In the percentage-of-completion method, estimated revenues and resulting contract income are calculated based on the total costs incurred to date as a percentage of total estimated costs.
	Unit-price contracts — A unit-price contract provides performance of a specific project at a specific price for each unit of output.  These contracts are commonly associated with road building.
	For fixed-price and unit-price contracts, if an estimate of total contract cost indicates a loss on a contract, the projected loss is recognized in full at the time of the estimate.  The loss amount is recognized as an “accrued loss provision” and is included in the accrued expenses and other liabilities amount on the consolidated balance sheet.  Because the full loss has been recognized, any future revenues that are generated will result in the accrued loss provision being changed and the gross profit of the contract in future periods will be zero.
	Unforeseen events and circumstances can alter the estimate of the costs and potential profit associated with a particular contract.  Total estimated costs, and thus contract revenues and income, can be impacted by changes in productivity, scheduling, the unit cost of labor, subcontracts, materials and equipment. Additionally, external factors such as weather, client needs, client delays in providing permits and approvals, labor availability, governmental regulation and politics may affect the progress of a project’s completion and thus the timing of revenue recognition.  To the extent that original cost estimates are modified, estimated costs to complete increase, delivery schedules are delayed, or progress under a contract is otherwise impeded, cash flow, revenue recognition and profitability from a particular contract may be adversely affected.
	Other contract forms — The Company also uses time and material and cost reimbursable plus fee contracts.  For these jobs, revenue is recognized based on contractual terms.  For example, time and material contract revenues are recognized based on purchasing and employee time records.
	For all of its contracts, the Company includes any provision for estimated losses on uncompleted contracts in accrued expenses. Changes in job performance, job conditions and estimated profitability, including those arising from final contract settlements, may result in revisions to costs and income. These revisions are recognized in the period in which the revisions are identified.
	The Company considers unapproved change orders to be contract variations for which it has customer approval for a change in scope but for which it does not have an agreed upon price change.  Costs associated with unapproved change orders are included in the estimated cost to complete the contracts and are treated as project costs as incurred. The Company recognizes revenue equal to costs incurred on unapproved change orders when realization of price approval is probable.  Unapproved change orders involve the use of estimates, and it is reasonably possible that revisions to the estimated costs and recoverable amounts may be required in future reporting periods to reflect changes in estimates or final agreements with customers.
	The Company considers claims to be amounts it seeks, or will seek, to collect from customers or others for customer-caused changes in contract specifications or design, or other customer-related causes of unanticipated additional contract costs on which there is no agreement with customers on both scope and price changes. Claims are included in the calculation of revenues when realization is probable and amounts can be reliably determined. Revenues in excess of contract costs incurred on claims are recognized when the amounts have been agreed upon with the customer.  Revenue in excess of contract costs from claims is recognized when an agreement is reached with customers as to the value of the claims, which in some instances may not occur until after completion of work under the contract. Costs associated with claims are included in the estimated costs to complete the contracts and are treated as project costs when incurred.
	The caption “Costs and estimated earnings in excess of billings” in the consolidated balance sheet represents unbilled receivables which arise when revenues have been recorded but the amount will not be billed until a later date.  Balances represent:  (a) unbilled amounts arising from the use of the percentage-of-completion method of accounting which may not be billed under the terms of the contract until a later date, (b) incurred costs to be billed under cost reimbursement type contracts, (c) amounts arising from routine lags in billing, or (d) the revenue associated with unapproved change orders or claims when realization is probable and amounts can be reliably determined.  For those contracts in which billings exceed contract revenues recognized to date, the excess amounts are included in the caption “Billings in excess of costs and estimated earnings”.
	In accordance with applicable terms of certain construction contracts, retainage amounts may be withheld by customers until completion and acceptance of the project.  Some payments of the retainage may not be received for a significant period after completion of our portion of a project.  In some jurisdictions, retainage amounts are deposited into an escrow account.
	Significant revision in contract estimate— As previously discussed, revenue recognition is based on the percentage-of-completion method for firm fixed-price contracts. Under this method, the costs incurred to date as a percentage of total estimated costs are used to calculate revenue. Total estimated costs, and thus contract revenues and margin, are impacted by many factors which can cause significant changes in estimates during the life cycle of a project.
	For projects that were in process in the prior year, but are either completed or continue to be in process during the current year, there can be a difference in revenues and profits recognized to the prior year, had current year estimates of costs to complete been known in the prior year.
	Customer Concentration — The Company operates in multiple industry segments encompassing the construction of industrial and public works infrastructure assets throughout primarily the United States. Typically, the top ten customers in any one calendar year generate revenues in excess of 50% of total revenues; however in most years a different group make up the top ten customers.
	During the three months ending March 31, 2014, revenues generated by the top ten customers were $283 million, which represented 60.1% of total revenues during the period.  During that period, a large solar electric plant represented 12.7% of total revenues and TX DOT represented 9.3% of total revenues.
	During the three months ending March 31, 2013, revenues generated by the top ten customers were $227 million, which represented 55.4% of total revenues during the period.  During that period, a large gas and electric utility represented 8.5% of total revenues and a large pipeline company represented 7.3% of total revenues.
	At March 31, 2014, approximately 12.7% of the Company’s accounts receivable were due from one customer, and that customer provided 12.7% of the Company’s revenues for the three months ended March 31, 2014.  At March 31, 2013, approximately 8.2% of the Company’s accounts receivable were due from one customer, and that customer provided 7.3% of the Company’s revenues for the three months ended March 31, 2013.
	Multiemployer Plans— Various subsidiaries in the West Construction Services segment are signatories to collective bargaining agreements.  These agreements require that the Company participate in and contribute to a number of multiemployer benefit plans for its union employees at rates determined by the agreements.  The trustees for each multiemployer plan determine the eligibility and allocations of contributions and benefit amounts, determine the types of benefits and administer the plan.  Federal law requires that if the Company were to withdraw from an agreement, it will incur a withdrawal obligation.  The potential withdrawal obligation may be significant.  Any withdrawal liability would be recorded when it is probable that a liability exists and can be reasonably estimated, in accordance with generally accepted accounting principles (“GAAP”).  In November 2011, the Company withdrew from the Central States Southeast and Southwest Areas Pension Fund multiemployer pension plan.  The Company has no plans to withdraw from any other agreements.  See Note 19 — “Commitments and Contingencies”.
	Inventory and uninstalled contract materials — Inventory consists of expendable construction materials and small tools that will be used in construction projects and is valued at the lower of cost, using first-in, first-out method, or market.  Uninstalled contract materials include certain job specific materials not yet installed which are valued using the specific identification method relating the inventory cost to a specific project.

Recent_Accounting_Pronouncemen

Recent Accounting Pronouncements	3 Months Ended
	Mar. 31, 2014
Recent Accounting Pronouncements	'
Recent Accounting Pronouncements	'
	Note 3—Recent Accounting Pronouncements
	In February 2013, the FASB issued ASU 2013-04, “Liabilities (Topic 405): Obligations Resulting from Joint and Several Liability Arrangements for Which the Total Amount of the Obligation Is Fixed at the Reporting Date (a consensus of the FASB Emerging Issues Task Force)”  (“ASU 2013-04”).  ASU 2013-04 provides guidance for the recognition, measurement, and disclosure of obligations resulting from joint and several liability arrangements for which the total amount of the obligation within the scope of this guidance is fixed at the reporting date. This ASU is an update to FASB ASC Topic 405, “Liabilities”.  The Company adopted this guidance as of January 1, 2014 which did not have a material impact on the Company’s consolidated financial statements.

Fair_Value_Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2014
Fair Value Measurements	'
Fair Value Measurements	'
	Note 4—Fair Value Measurements
	ASC Topic 820, “Fair Value Measurements and Disclosures”, defines fair value in GAAP, establishes a framework for measuring fair value and requires certain disclosures about fair value measurements.  ASC Topic 820 requires that certain financial assets and financial liabilities be re-measured and reported at fair value each reporting period while other non-financial assets and liabilities may be re-measured and reported at fair value on a non-recurring basis.
	In general, fair values determined by Level 1 inputs use quoted prices (unadjusted) in active markets for identical assets or liabilities. Fair values determined by Level 2 inputs use data points that are observable such as quoted prices, interest rates and yield curves. Fair values determined by Level 3 inputs are “unobservable data points” for the asset or liability and include situations where there is little, if any, market activity for the asset or liability.
	The following table presents, for each of the fair value hierarchy levels identified under ASC Topic 820, the Company’s financial assets and liabilities that are required to be measured at fair value at March 31, 2014 and December 31, 2013:
					Fair Value Measurements at Reporting Date
		Amount			Quoted Prices		Significant	Significant
		Recorded			in Active Markets		Other	Unobservable
		on Balance			for Identical Assets		Observable	Inputs
		Sheet			(Level 1)		Inputs	(Level 3)
							(Level 2)
	Assets as of March 31, 2014:
	Cash and cash equivalents	$	149,620		$	149,620	—	—
	Short-term investments	$	17,326		$	17,326	—	—
	Liabilities as of March 31, 2014:
	Contingent consideration	$	4,347		—		—	$	4,347
	Assets as of December 31, 2013:
	Cash and cash equivalents	$	196,077		$	196,077	—	—
	Short-term investments	$	18,686		$	18,686	—	—
	Liabilities as of December 31, 2013:
	Contingent consideration	$	9,233		—		—	$	9,233
	Short-term investments consist primarily of Certificates of Deposit (“CDs”) and U.S. Treasury bills with various financial institutions that are backed by the federal government.
	Other financial instruments of the Company not listed in the table consist of accounts receivable, accounts payable and certain accrued liabilities.  These financial instruments generally approximate fair value based on their short-term nature.  The carrying value of the Company’s long-term debt approximates fair value based on comparison with current prevailing market rates for loans of similar risks and maturities.
	The following table provides changes to the Company’s contingent consideration liability Level 3 fair value measurements during the three months ended March 31, 2014:
	Contingent Consideration
	Balance at December 31, 2013	$	9,233
	Additions:
	Change in fair value of contingent consideration	114
	Reductions:
	Payment to Q3C sellers	(5,000		)
	Balance at March 31, 2014	$	4,347
	On a quarterly basis, the Company assesses the estimated fair value of the contractual obligation to pay the contingent consideration and any changes in estimated fair value are recorded as other non-operating expense or income in the Company’s consolidated statement of operations.  Fluctuations in the fair value of contingent consideration are impacted by two unobservable inputs, management’s estimate of the probability (which has ranged from 33% to 100%) of the acquired company meeting the contractual operating performance target and the estimated discount rate (a rate that approximates the Company’s cost of capital). Significant changes in either of those inputs in isolation would result in a significantly different fair value measurement.  Generally, a change in the assumption of the probability of meeting the performance target is accompanied by a directionally similar change in the fair value of contingent consideration liability, whereas a change in assumption of the estimated discount rate is accompanied by a directionally opposite change in the fair value of contingent consideration liability.

Accounts_Receivable

Accounts Receivable	3 Months Ended
	Mar. 31, 2014
Accounts Receivable	'
Accounts Receivable	'
	Note 5—Accounts Receivable
	The following is a summary of the Company’s accounts receivable:
		March 31,		December 31,
		2014		2013
	Contracts receivable, net of allowance for doubtful accounts of $672 at March 31, 2014 and $692 at December 31, 2013	$	233,932	$	257,354
	Retention receivable	54,850		47,054
		288,782		304,408
	Other accounts receivable	342		547
		$	289,124	$	304,955

Costs_and_Estimated_Earnings_o

Costs and Estimated Earnings on Uncompleted Contracts	3 Months Ended
	Mar. 31, 2014
Costs and Estimated Earnings on Uncompleted Contracts	'
Costs and Estimated Earnings on Uncompleted Contracts	'
	Note 6—Costs and Estimated Earnings on Uncompleted Contracts
	Costs and estimated earnings on uncompleted contracts consist of the following:
		March 31,			December 31,
		2014			2013
	Costs incurred on uncompleted contracts	$	3,722,890		$	4,741,249
	Gross profit recognized	432,568			582,430
		4,155,458			5,323,679
	Less: billings to date	(4,227,692		)	(5,439,898		)
		$	(72,234	)	$	(116,219	)
	This amount is included in the accompanying consolidated balance sheets under the following captions:
		March 31,			December 31,
		2014			2013
	Costs and estimated earnings in excess of billings	$	75,067		$	57,146
	Billings in excess of costs and estimated earnings	(147,301		)	(173,365		)
		$	(72,234	)	$	(116,219	)

Equity_Method_Investments

Equity Method Investments	3 Months Ended
	Mar. 31, 2014
Equity Method Investments.	'
Equity Method Investments	'
	Note 7—Equity Method Investments
	WesPac Energy LLC and WesPac Midstream LLC
	On July 1, 2010, the Company acquired a 50% membership interest in WesPac Energy LLC (“WPE”), a Nevada limited liability company, from Kealine Holdings, LLC (“Kealine”), a Nevada limited liability company, with Kealine retaining a remaining 50% membership interest. WPE develops pipeline and terminal projects, primarily for the oil and gas industry.
	On September 30, 2013, WPE, Kealine and the Company entered into an agreement (the “Midstream Agreement”) with Highstar Capital IV, LP (“Highstar”), to form a new entity, WesPac Midstream LLC, a Delaware limited liability company (“Midstream”), with WPE contributing project assets to Midstream and Highstar investing $6,082 in cash.  The Midstream Agreement provides for potential bonus payments of up to $5,750 each for Kealine and the Company based on attainment of milestones for two projects; however, the amount of these potential bonus payments will be reduced to $4,500 each if certain milestones are not achieved by July 1, 2014.
	The Midstream agreement requires that Highstar fund Midstream’s overhead operations for up to two years. To maintain its equity position, the Company will be required to fund its pro rata share of Midstream’s projects.
	The Company has accounted for the investment using the equity method of accounting and recorded its proportionate share of operating expenses.  During the fourth quarter 2013, the Company recorded non-cash impairment charges and wrote-off the value of its equity investment.  As a consequence, in accordance with ASC Topic 323, the Company has suspended the equity method of accounting and the Company’s proportionate share of losses will not be recognized unless the Company committed to a further investment.
	The following is a summary of the financial position and results as of and for the periods ended:
		March 31,			December 31,
		2014			2013
	Balance sheet data
	Assets	$	24,928		$	19,142
	Liabilities	852			1,023
	Net assets	$	24,076		$	18,119
	Company’s equity investment in venture	$	—		$	—
		Three months ended
		March 31,
		2014			2013
	Earnings data:
	Revenue	$	3		$	39
	Expenses	$	190		$	231
	Earnings before taxes	$	(187	)	$	(192	)
	Company’s equity in earnings	$	—		$	(96	)
	Alvah, Inc.
	As part of its acquisition of Q3C, the Company acquired a 49% membership interest in Alvah, Inc., a California corporation (“Alvah”).  Alvah is engaged in electrical contracting activities, primarily in Northern California and has worked as a subcontractor for ARB both prior to and subsequent to the Q3C acquisition.  During the three months ending March 31, 2014, payments made by ARB to Alvah were $1,336 and there were no payments made by Q3C.  For the same period in the prior year, ARB made payments of $1,486 and Q3C made payments of $1,245.
	On February 5, 2014, the majority owner of Alvah, in accordance with the original investment agreement, elected to purchase the Company’s minority interest effective January 1, 2014 for a cash payment of $1,189.  At the time of the transaction, the Company recorded income adjustments of $14 related to the final sale in the first quarter 2014.

Business_Combinations

Business Combinations	3 Months Ended
	Mar. 31, 2014
Business Combinations	'
Business Combinations	'
	Note 8 — Business Combinations
	The Company purchased the assets of FSSI on March 11, 2013.  The fair value of the consideration was $2,377, which consisted of a cash payments and three future potential payments to a key employee, contingent upon FSSI meeting certain performance targets for the remainder of calendar year 2013 and for calendar years 2014 and 2015.
	The contingent consideration was defined as:  (1) a payment of $500 in cash for the achievement of pretax income of at least $553 for the remainder of the year ending December 31, 2013; (2) a payment of $500 in cash if pretax income for the year 2014 is at least $2,502; and (3), a payment of $500 in cash if pretax income for the year 2015 is at least $4,227.  The estimated fair value of the potential contingent consideration on the acquisition date was $702.  At December 31, 2013, the Company determined that the operations of FSSI had not met the 2013 performance target nor was it probable that FSSI would meet any of the future targets; therefore, the full amount of the accrued contingent consideration was credited to non-operating income at December 31, 2013.
	The purchase agreement also included a provision of an initial payment of $1,000 for a five-year employment, non-competition and non-solicitation agreement with the key employee.  The agreement provided that if the employee terminated his employment or violated the agreement prior to the end of the five-year period, he would be required to repay the unamortized amount of the initial payment.  This agreement was accounted for as a prepaid asset and was being amortized equally over a five-year period.
	Because the operating performance of FSSI did not meet expected targets, the Company made changes in FSSI management which resulted in adjustments to the value of certain FSSI assets (including the write-down of the unamortized portion of the prepaid employment asset) and liabilities as of December 31, 2013.
	Supplemental Unaudited Pro Forma Information for the three months ended March 31, 2014 and 2013
	In accordance with ASC Topic 805 we are combining the pro forma information for the FSSI acquisition.  The following pro forma information for the three months ended March 31, 2014 and 2013 presents the results of operations of the Company as if the FSSI acquisition had occurred at the beginning of 2013. The supplemental pro forma information has been adjusted to include:
	·                                          the pro forma impact of amortization of intangible assets and depreciation of property, plant and equipment, based on the purchase price allocations;
	·                                          the pro forma impact of the expense associated with the amortization of the discount for the fair value of the contingent consideration for potential earnout liabilities that may be achieved in 2013 and 2014 for the FSSI acquisition;
	·                                          the pro forma tax effect of both the income before income taxes and the pro forma adjustments, calculated using a tax rate of 39.0% for the three months ended March 31, 2014 and the same period in 2013; and
	The pro forma results are presented for illustrative purposes only and are not necessarily indicative of, or intended to represent, the results that would have been achieved had the FSSI acquisition been completed on January 1, 2013.  For example, the pro forma results do not reflect any operating efficiencies and associated cost savings that the Company might have achieved with respect to the FSSI acquisition.
		Three months
		ended March 31,
		2014		2013
	Revenues	470,074		412,794
	Income before provision for income taxes	18,355		16,132
	Net income attributable to Primoris	10,833		9,700
	Weighted average common shares outstanding:
	Basic	51,610		51,456
	Diluted	51,714		51,467
	Earnings per share:
	Basic	$	0.21	$	0.19
	Diluted	$	0.21	$	0.19

Intangible_Assets

Intangible Assets	3 Months Ended
	Mar. 31, 2014
Intangible Assets	'
Intangible Assets	'
	Note 9—Intangible Assets
	At March 31, 2014 and December 31, 2013, intangible assets totaled $43,460 and $45,303, respectively, net of amortization.  The table below summarizes the intangible asset categories, amounts and the average amortization periods, which are generally on a straight-line basis, as follows:
		Amortization		March 31,		December 31,
		Period		2014		2013
	Tradename	3 to 10 years		$	20,041	$	21,023
	Non-compete agreements	2 to 5 years		$	2,093	$	2,575
	Customer relationships	5 to 15 years		$	21,326	$	21,705
	Total			$	43,460	$	45,303
	Amortization expense of intangible assets was $1,844 and $1,794 for the three months ended March 31, 2014 and 2013, respectively.  Estimated future amortization expense for intangible assets is as follows:
	For the Years Ending	Estimated
	December 31,	Intangible
		Amortization
		Expense
	2014 (remaining nine months)	$	5,899
	2015	5,921
	2016	5,451
	2017	5,386
	2018	5,307
	Thereafter	15,496
		$	43,460

Accounts_Payable_and_Accrued_L

Accounts Payable and Accrued Liabilities	3 Months Ended
	Mar. 31, 2014
Accounts Payable and Accrued Liabilities	'
Accounts Payable and Accrued Liabilities	'
	Note 10—Accounts Payable and Accrued Liabilities
	At March 31, 2014 and December 31, 2013, accounts payable included retention amounts of approximately $6,233 and $5,602, respectively.  These amounts are due to subcontractors have been retained pending contract completion and customer acceptance of jobs.
	The following is a summary of accrued expenses and other current liabilities at:
		March 31,		December 31,
		2014		2013
	Payroll and related employee benefits	$	35,618	$	36,556
	Insurance, including self-insurance reserves	35,405		33,880
	Reserve for estimated losses on uncompleted contracts	274		1,392
	Corporate income taxes and other taxes	14,783		13,305
	Accrued overhead cost	759		1,165
	Other	4,720		4,781
		$	91,559	$	91,079

Credit_Arrangements

Credit Arrangements	3 Months Ended
	Mar. 31, 2014
Credit Arrangements	'
Credit Arrangements	'
	Note 11—Credit Arrangements
	Revolving Credit Facility
	As of March 31, 2014, the Company had a revolving credit facility (the “Credit Agreement”) with The PrivateBank and Trust Company, as administrative agent (the “Administrative Agent”) and co-lead arranger, The Bank of the West, as co-lead arranger, and IBERIABANK Corporation (the “Lenders”). The Credit Agreement is a $75 million revolving credit facility whereby the Lenders agree to make loans on a revolving basis from time to time and to issue letters of credit for up to the $75 million committed amount. The Credit Agreement also provides for an incremental facility of up to $50 million. The termination date of the Credit Agreement is December 28, 2017.
	The principal amount of any loans under the Credit Agreement will bear interest at either: (i) LIBOR plus an applicable margin as specified in the Credit Agreement (based on the Company’s senior debt to EBITDA ratio as that term is defined in the Credit Agreement), or (ii) the Base Rate (which is the greater of (a) the Federal Funds Rate plus 0.5% or (b) the prime rate as announced by the Administrative Agent). Quarterly non-use fees, letter of credit fees and administrative agent fees are payable at rates specified in the Credit Agreement.
	The principal amount of any loan drawn under the Credit Agreement may be prepaid in whole or in part, with a minimum prepayment of $5 million, at any time, potentially subject to make-whole provisions.
	The Credit Agreement includes customary restrictive covenants for facilities of this type, as discussed below.
	Commercial letters of credit were $4,808 at March 31, 2014 and $5,074 at December 31, 2013.  Other than commercial letters of credit, there were no borrowings under this line of credit during the three months ended March 31, 2014, leaving available borrowing capacity at $70,192 at March 31, 2014.
	Senior Secured Notes and Shelf Agreement
	On December 28, 2012, the Company entered into a $50 million Senior Secured Notes purchase (“Senior Notes”) and a $25 million private shelf agreement (the “Notes Agreement”) by and among the Company, The Prudential Investment Management, Inc. and certain Prudential affiliates (the “Noteholders”).
	The Senior Notes amount was funded on December 28, 2012. The Senior Notes are due December 28, 2022 and bear interest at an annual rate of 3.65%, paid quarterly in arrears. Annual principal payments of $7.1 million are required from December 28, 2016 through December 28, 2021 with a final payment due on December 28, 2022. The principal amount may be prepaid, with a minimum prepayment of $5 million, at any time, subject to make-whole provisions.
	On July 25, 2013, the Company drew the full $25 million available under the Notes Agreement.  The notes are due July 25, 2023 and bear interest at an annual rate of 3.85% paid quarterly in arrears.  Seven annual principal payments of $3.6 million are required from July 25, 2017 with a final payment due on July 25, 2023.
	Loans made under both the Credit Agreement and the Notes Agreement are secured by our assets, including, among others, our cash, inventory, goods, equipment (excluding equipment subject to permitted liens) and accounts receivable. All of our domestic subsidiaries have issued joint and several guaranties in favor of the Lenders and Noteholders for all amounts under the Credit Agreement and Notes Agreement.
	Both the Credit Agreement and the Notes Agreement contain various restrictive and financial covenants including among others, minimum tangible net worth, senior debt/EBITDA ratio, debt service coverage requirements and a minimum balance for unencumbered net book value for fixed assets. In addition, the agreements include restrictions on investments, change of control provisions and provisions in the event the Company disposes more than 20% of its total assets.
	The Company was in compliance with the covenants for the Credit Agreement and Notes Agreement at March 31, 2014.
	Canadian Credit Facility
	The Company has a credit facility for $8,000 in Canadian dollars with a Canadian bank for purposes of issuing commercial letters of credit in Canada.  The credit facility has an annual renewal and provides for the issuance of commercial letters of credit for a term of up to five years. The facility provides for an annual fee of 1% for any issued and outstanding commercial letters of credit. Letters of credit can be denominated in either Canadian or U.S. dollars. At March 31, 2014 and December 31, 2013, letters of credit outstanding totaled $3,079 and $2,788 in Canadian dollars, respectively.  At March 31, 2014, the available borrowing capacity was $4,921 in Canadian dollars.  The credit facility contains a working capital restrictive covenant for our Canadian subsidiary, OnQuest Canada, ULC.  At March 31, 2014, OnQuest Canada, ULC was in compliance with the covenant.

Noncontrolling_Interests

Noncontrolling Interests	3 Months Ended
	Mar. 31, 2014
Noncontrolling Interests	'
Noncontrolling Interests	'
	Note 12 — Noncontrolling Interests
	The Company applies the provisions of ASC Topic 810-10-45, which establishes accounting and reporting standards for ownership interests of parties other than the Company in subsidiaries, such as joint ventures and partnerships.
	The Company determined that the Blythe joint venture was a variable interest entity (“VIE”) and that the Company was the primary beneficiary as a result of its significant influence over the joint venture operations.
	The Blythe joint venture operating activities are included in the Company’s consolidated statements of income as follows for the three months ended March 31:
		March 31,		March 31,
		2014		2013
	Revenues	$	940	$	16,272
	Net income attributable to noncontrolling interests	432		270
	Since Blythe is a partnership, no tax effect was recognized for the income.  Blythe made a $1,125 distribution to the non-controlling interests and a $1,125 distribution to the Company during the three months ended March 31, 2014.  There were no distributions made during the three months ended March 31, 2013.  There were no capital contributions made during the year ended December 31, 2013 or through the three months ended March 31, 2014.
	The carrying value of the assets and liabilities associated with the operations of the Blythe joint venture are included in the Company’s consolidated balance sheets as follows:
		March 31,		December 31,
		2014		2013
	Cash	$	1,088	$	3,025
	Accounts receivable	—		1,085
	Current liabilities	405		2,041
	The net assets of the joint venture are restricted for use by the project and are not available for general operations of the Company.

Contingent_Earnout_Liabilities

Contingent Earnout Liabilities	3 Months Ended
	Mar. 31, 2014
Contingent Earnout Liabilities	'
Contingent Earnout Liabilities	'
	Note 13 — Contingent Earnout Liabilities
	As part of the Rockford acquisition in November 2010, the Company agreed to issue additional cash and common stock to the sellers, contingent upon Rockford meeting certain operating performance targets The final contingent earnout for 2012 was achieved, and in April 2013, the Company made a $6,900 cash payment.
	A contingent earnout payment of $4,000 was made in April 2013 to the sellers of Sprint for achieving certain operating performance targets in 2012.  The operations of Sprint did not meet the 2013 performance target.
	Saxon’s operations did not meet the performance target for the 2013 year and no payment was made.
	In March 2014, the Company paid $5,000 to the sellers of Q3C based on achievement of the 2013 operating performance targets.  The sellers will be paid up to an additional $5,000 in 2015, contingent upon meeting certain performance targets for the calendar year 2014.  The estimated fair value at March 31, 2014 of the remaining contingent earnout was $4,347.

Related_Party_Transactions

Related Party Transactions	3 Months Ended
	Mar. 31, 2014
Related Party Transactions	'
Related Party Transactions	'
	Note 14—Related Party Transactions
	Primoris has entered into leasing transactions with Stockdale Investment Group, Inc. (“SIGI”).  Brian Pratt, our Chief Executive Officer, President and Chairman of the Board of Directors and our largest stockholder, holds a majority interest and is the chairman, president and chief executive officer and a director of SIGI.  John M. Perisich, our Executive Vice President and General Counsel, is secretary of SIGI.
	Primoris leases properties from SIGI at the following locations:
	1.                                      Bakersfield, California (lease expires October 2022)
	2.                                      Pittsburg, California (lease expires April 2023)
	3.                                      San Dimas, California (lease expires March 2019)
	4.                                      Pasadena, Texas (leases expire in July 2019 and 2021)
	During the three months ended March 31, 2014 and 2013, the Company paid $219 and $235, respectively, in lease payments to SIGI for the use of these properties.
	Primoris leases a property from Roger Newnham, a former owner and manager of our subsidiary, OnQuest Canada, ULC. The property is located in Calgary, Canada. During the three months ended March 31, 2014 and 2013, Primoris paid $72 and $75, respectively, in lease payments.  The current term of the lease is through December 31, 2014.
	Primoris leases a property from Lemmie Rockford, one of the Rockford sellers, which commenced November 1, 2011.  The property is located in Toledo, Washington.  During the three months ended March 31, 2014 and 2013, Primoris paid $23 and $23, respectively, in lease payments.  The lease expires in January 2015.
	Primoris leases a property from Quality RE Partners, owned by three of the Q3C selling shareholders, of whom two are current employees, including Jay Osborn, President of Q3C.  The property is located in Little Canada, Minnesota.  During the three months ended March 31, 2014 and 2013, the Company paid $66 and $66, respectively, in lease payments to Quality RE Partners.  The lease expires in October 2022.
	As discussed in Note 7— “Equity Method Investments”, the Company owns several non-consolidated investments and has recognized revenues on work performed by the Company for those joint ventures.

StockBased_Compensation

Stock-Based Compensation	3 Months Ended
	Mar. 31, 2014
Stock-Based Compensation	'
Stock-Based Compensation	'
	Note 15—Stock-Based Compensation
	On May 3, 2013, the Board of Directors granted 100,000 Restricted Stock Units (“Units”) to an executive under the 2013 Long-term Incentive Equity Plan (the “Equity Plan”).  Commencing annually on May 10, 2014 and ending April 30, 2017, the Units will vest in four equal installments subject to continuing employment of the executive.  On March 24, 2014, the Board of Directors granted 48,512 Units to another executive under the Equity Plan.  The Units will vest 50% on September 23, 2015 and the remaining 50% on March 23, 2017 subject to continuing employment of the executive.  Vesting in both grants is also subject to earlier acceleration, termination, cancellation or forfeiture as provided in the underlying Primoris Restricted Stock Unit agreement (“RSU Award Agreement”).  Each Unit represents the right to receive one share of the Company’s common stock when vested.
	Under guidance of ASC Topic 718 “Compensation — Stock Compensation”, stock-based compensation cost is measured at the date of grant (utilizing the prior-day closing price), based on the calculated fair value of the stock-based award, and is recognized as expense over the employee’s requisite service period (generally the vesting period of the award).
	The fair value of the Units was based on the closing market price of our common stock on the day prior to the date of the grant.  Stock compensation expense for the Units is being amortized using the straight-line method over the service period.  For the three months ended March 31, 2014, the Company recognized $137 in compensation expense.  At March 31, 2014, approximately $3.19 million of unrecognized compensation expense remains for the Units which will be recognized over the next 3.1 years through April 30, 2017.
	Vested Units accrue “Dividend Equivalents” (as defined in the Equity Plan) which will be accrued as additional Units.  At March 31, 2014, there were no accrued Dividend Equivalent Units.

Income_Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2014
Income Taxes	'
Income Taxes	'
	Note 16—Income Taxes
	The effective tax rate on income before taxes and noncontrolling interests for the three months ended March 31, 2014 is 38.17%.  The effective tax rate for income attributable to Primoris is 39.56%. The rate differs from the U.S. federal statutory rate of 35% due primarily to state income taxes, the “Domestic Production Activity Deduction” and nondeductible meals and incidental per diems common in the construction industry.
	To determine its quarterly provision for income taxes, the Company uses an estimated annual effective tax rate, which is based on expected annual income, statutory tax rates and tax planning opportunities available in the various jurisdictions in which the Company operates. Certain significant or unusual items are separately recognized in the quarter in which they occur and can be a source of variability in the effective tax rate from quarter to quarter.  The Company recognizes interest and penalties related to uncertain tax positions, if any, as an income tax expense.
	Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences of temporary differences between the financial reporting basis and tax basis of the Company’s assets and liabilities. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period of enactment date.
	In September 2012, the Internal Revenue Service (“IRS”) concluded an examination of our federal income tax returns for 2008 and 2009, which did not have a material impact on our financial statements.  In the third quarter of 2013, the IRS initiated an examination of our federal income tax returns for 2011 and 2012.  The tax years 2010 through 2012 remain open to examination by the IRS.  The statute of limitations of state and foreign jurisdictions vary generally between 3 to 5 years.  Accordingly, the tax years 2008 through 2012 generally remain open to examination by the other taxing jurisdictions in which the Company operates.

Dividends_and_Earnings_Per_Sha

Dividends and Earnings Per Share	3 Months Ended
	Mar. 31, 2014
Dividends and Earnings Per Share	'
Dividends and Earnings Per Share	'
	Note 17—Dividends and Earnings Per Share
	The Company has paid or declared cash dividends during 2014 as follows:
	·                                    On October 30, 2013, the Company declared a cash dividend of $0.035 per common share, payable to stockholders of record on December 31, 2013.  The dividend, totaling $1,805, was paid on January 15, 2014.
	·                                    On February 26, 2014, the Company declared a cash dividend of $0.035 per common share, payable to stockholders of record on March 31, 2014.  The dividend, totaling $1,808, was paid on April 15, 2014.
	The table below presents the computation of basic and diluted earnings per share for the three months ended March 31, 2014 and 2013:
		Three months
		ended March 31,
		2014		2013
	Numerator:
	Net income attributable to Primoris	$	10,833	$	9,770
	Denominator:
	Weighted average shares for computation of basic earnings per share	51,610		51,456
	Dilutive effect of shares issued to independent directors	—		9
	Dilutive effect of unvested restricted stock units (1)	104		—
	Dilutive effect of shares to be issued to Q3C sellers (2)	—		2
	Weighted average shares for computation of diluted earnings per share	51,714		51,467
	Earnings per share:
	Basic	$	0.21	$	0.19
	Diluted	$	0.21	$	0.19
	(1)         Represents the dilutive effect of a grant for 100,000 shares of Units on May 3, 2013 and 48,512 shares of Units on March 24, 2014.
	(2)         Represents the dilutive effect of 29,273 unregistered shares of common stock provided in January 2013 as part of the purchase consideration for the Q3C acquisition.

Stockholders_Equity

Stockholders' Equity	3 Months Ended
	Mar. 31, 2014
Stockholders' Equity	'
Stockholders' Equity	'
	Note 18—Stockholders’ Equity
	Common stock — In March 2014, the Company received $1,671 for 77,455 shares of common stock purchased under a long-term incentive plan.  The Company’s Long-Term Retention Plan (“LTR Plan”) for managers and executives allows participants to use a portion of their annual bonus amount to purchase Company common stock at a discount from the market price. The shares purchased in March 2014 were for bonus amounts earned in 2013 and the number of shares was calculated at 75% of the average market closing price of December 2013.  In March 2013, the Company received $1,455 for 131,989 shares of common stock issued under the LTR Plan for bonus amounts earned in the prior year.
	In March 2014 and 2013, the Company issued 6,375 shares and 12,480 shares of common stock, respectively, as part of the quarterly compensation of the non-employee members of the Board of Directors.
	As part of the acquisition of Q3C, the Company issued 29,273 unregistered shares of stock on January 7, 2013.  The shares were issued based on the average December 2012 closing prices, or $14.69 per share for a total value of $430.
	As discussed in Note 15 — “Stock Based Compensation”, the Board of Directors has granted a total of 148,512 shares of Units under the Equity Plan.
	In February 2014, the Company’s Board of Directors authorized a share repurchase program under which the Company, from time to time and depending on market conditions, share price and other factors, may acquire shares of its common stock on the open market or in privately negotiated transactions up to an aggregate purchase price of $23 million.  During the three months ending March 31, 2014, the Company did not purchase any shares of stock.  The share repurchase program expires December 31, 2014.

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2014
Commitments and Contingencies.	'
Commitments and Contingencies	'
	Note 19—Commitments and Contingencies
	Leases— The Company leases certain property and equipment under non-cancellable operating leases which expire at various dates through 2019. The leases require the Company to pay all taxes, insurance, maintenance and utilities and are classified as operating leases in accordance with ASC Topic 840 “Leases”.
	Total lease expense during the three months ended March 31, 2014 and 2013 was $3,637 and $3,845, respectively, including amounts paid to related parties of $380 and $399, respectively.
	Letters of credit— At March 31, 2014, the Company had letters of credit outstanding of $7,595 and at December 31, 2013, the Company had letters of credit outstanding of $7,696.  The outstanding amounts include the U.S. dollar equivalents for letters of credit issued in Canadian dollars.
	Litigation — On February 7, 2012, the Company was sued in an action entitled North Texas Tollway Authority, Plaintiff v. James Construction Group, LLC, and KBR, Inc., Defendants, v. Reinforced Earth Company, Third-Party Defendant (the “Lawsuit”). The Lawsuit was brought in the District Court of Collin County, Texas, 401st Judicial District, Cause No. 401-01747-2012.  In the Lawsuit, the North Texas Tollway Authority (“NTTA”) is alleging damages to a road and retaining wall that were constructed in 1999 on the George Bush Turnpike near Dallas, Texas, due to negligent construction by JCG.  The Lawsuit claims that the cost to repair the retaining wall was approximately $5,400.  The NTTA also alleges that six other walls constructed on the project by JCG could have the same potential exposure to failure.  The Company has denied any liability, has tendered the claim to its insurance carriers and has cross-complained against its engineering subcontractor for potential design liability.  The extent of insurance coverage by the carriers of the Company and its subcontractor is undetermined at this time.  The Company is investigating all potential causes of the alleged loss, including design liabilities of the owner, owner’s engineers and/or the Company’s subcontractor.  The Company will vigorously defend the claims.  After discussion with our legal counsel, we have recorded loss contingencies which have not been material to the financial statements, to reflect the best estimate of the Company’s portion of the NTTA claim.  At this time, management does not believe it is possible to make a reasonably probable estimate of additional loss or a range of loss.
	The Company is subject to other claims and legal proceedings arising out of its business. The Company provides for costs related to contingencies when a loss from such claims is probable and the amount is reasonably determinable. In determining whether it is possible to provide an estimate of loss, or range of possible loss, the Company reviews and evaluates its litigation and regulatory matters on a quarterly basis in light of potentially relevant factual and legal developments. If we determine an unfavorable outcome is not probable or reasonably estimable, we do not accrue for a potential litigation loss. Management is unable to ascertain the ultimate outcome of other claims and legal proceedings; however, after review and consultation with counsel and taking into consideration relevant insurance coverage and related deductibles/self-insurance retention, management believes that it has meritorious defense to the claims and believes that the reasonably possible outcome of such claims will not, individually or in the aggregate, have a materially adverse effect on the consolidated results of operations, financial condition or cash flows of the Company.
	Bonding— At March 31, 2014 and December 31, 2013, the Company had bid and completion bonds issued and outstanding totaling approximately $1,336,007 and $1,458,744, respectively.
	Withdrawal liability for multiemployer pension plan— In November 2011, Rockford and ARB, along with other members of the Pipe Line Contractors Association (“PLCA”), withdrew from the Central States Southeast and Southwest Areas Pension Fund multiemployer pension plan (the “Plan”).  The Company withdrew from the Plan in order to mitigate its liability in connection with the Plan, which is significantly underfunded.  The Company recorded a liability of $7,500 based on information provided by the Plan. However, the Plan has asserted that the PLCA members did not affect a proper withdrawal in 2011. The Company believes that a legally effective withdrawal occurred in November 2011 and has recorded the withdrawal liability on that basis. If the Plan were to prevail in its assertion and the withdrawal of the Company were deemed to occur after 2011, the amount of any withdrawal liability could increase.
	Prior to the Company’s acquisition, Q3C had also withdrawn from the Plan.  In November 2012, Q3C estimated a withdrawal liability of $85.  In the first quarter of 2013, the Plan asserted that the liability was $119.  Without agreeing to the amount, Q3C has made monthly payments totaling $19 as of March 31, 2014.
	Contingent Consideration— Earnouts related to acquisitions are discussed in Note 13 — “Contingent Earnout Liabilities”.

Reportable_Operating_Segments

Reportable Operating Segments	3 Months Ended
	Mar. 31, 2014
Reportable Operating Segments	'
Reportable Operating Segments	'
	Note 20—Reportable Operating Segments
	The Company segregates its business into three operating segments: the East Construction Services (“East”) segment, the West Construction Services (“West”) segment and the Engineering segment.
	The East segment includes the JCG and PES construction business, located primarily in the southeastern United States and in the Gulf Coast region of the United States.  Cardinal Contractors, Inc. is included in this segment.
	The West segment includes the construction services performed by ARB, ARB Structures, Inc., Rockford, Alaska Continental Pipeline, Inc., Q3C, Primoris Renewables, LLC, Juniper Rock Corporation and Stellaris, LLC.  Most of the entities perform work primarily in California; however, Rockford operates throughout the United States and Q3C operates in the upper Midwest United States.  The Blythe joint venture is also included as a part of the segment.
	The Engineering segment includes the results of OnQuest, Inc. and OnQuest Canada, ULC.
	All intersegment revenues and gross profit, which were immaterial, have been eliminated in the following tables.
	Segment Revenues
	Revenue by segment for the three months ended March 31, 2014 and 2013 were as follows:
		For the three months ended March 31,
		2014				2013
	Segment	Revenue		% of		Revenue		% of
				Segment				Segment
				Revenue				Revenue
	East	$	223,072	47.5	%	$	190,211	46.4	%
	West	234,026		49.7	%	207,686		50.6	%
	Engineering	12,976		2.8	%	12,098		3	%
	Total	$	470,074	100	%	$	409,995	100	%
	Segment Gross Profit
	Gross profit by segment for the three months ended March 31, 2014 and 2013 were as follows:
		For the three months ended March 31,
		2014				2013
	Segment	Gross		% of		Gross		% of
		Profit		Segment		Profit		Segment
				Revenue				Revenue
	East	$	16,017	7.2	%	$	14,995	7.9	%
	West	31,673		13.5	%	28,749		13.8	%
	Engineering	2,067		15.9	%	2,352		19.4	%
	Total	$	49,757	10.6	%	$	46,096	11.2	%
	Segment Goodwill
	The following presents the amount of goodwill recorded by segment at March 31, 2014 and at December 31, 2013.
	Segment	March 31,		December 31,
		2014		2013
	East	$	70,946	$	70,946
	West	45,239		45,239
	Engineering	2,441		2,441
	Total	$	118,626	$	118,626
	Geographic Region — Revenues and Total Assets
	Revenue and total assets by geographic area were as follows:
		External Revenues
		For the three months ended March 31,
		2014				2013				Total Assets
	Country:	Revenue		% of		Revenue		% of		March 31,		December 31,
				Revenue				Revenue		2014		2013
	United States	$	465,244	99	%	$	405,163	98.8	%	$	996,055	$	1,039,322
	Non-United States	4,830		1		4,832		1.2		10,897		11,371
	Total	$	470,074	100	%	$	409,995	100	%	$	1,006,952	$	1,050,693
	All non-United States revenue was generated in the Engineering segment.  For the table above, revenues generated by OnQuest Canada, ULC, were used to determine non-United States revenues.

Basis_of_Presentation_Policies

Basis of Presentation (Policies)	3 Months Ended
	Mar. 31, 2014
Basis of Presentation	'
Revenue recognition	'
	Revenue recognition
	Fixed-price contracts — Historically, a substantial portion of the Company’s revenue has been generated under fixed-price contracts. Fixed price contracts generally provide that the Company will perform all of the work required by the contract for a stated price.  For fixed-price contracts, the Company recognizes revenues using the percentage-of-completion method, which may result in uneven and irregular results. In the percentage-of-completion method, estimated revenues and resulting contract income are calculated based on the total costs incurred to date as a percentage of total estimated costs.
	Unit-price contracts — A unit-price contract provides performance of a specific project at a specific price for each unit of output.  These contracts are commonly associated with road building.
	For fixed-price and unit-price contracts, if an estimate of total contract cost indicates a loss on a contract, the projected loss is recognized in full at the time of the estimate.  The loss amount is recognized as an “accrued loss provision” and is included in the accrued expenses and other liabilities amount on the consolidated balance sheet.  Because the full loss has been recognized, any future revenues that are generated will result in the accrued loss provision being changed and the gross profit of the contract in future periods will be zero.
	Unforeseen events and circumstances can alter the estimate of the costs and potential profit associated with a particular contract.  Total estimated costs, and thus contract revenues and income, can be impacted by changes in productivity, scheduling, the unit cost of labor, subcontracts, materials and equipment. Additionally, external factors such as weather, client needs, client delays in providing permits and approvals, labor availability, governmental regulation and politics may affect the progress of a project’s completion and thus the timing of revenue recognition.  To the extent that original cost estimates are modified, estimated costs to complete increase, delivery schedules are delayed, or progress under a contract is otherwise impeded, cash flow, revenue recognition and profitability from a particular contract may be adversely affected.
	Other contract forms — The Company also uses time and material and cost reimbursable plus fee contracts.  For these jobs, revenue is recognized based on contractual terms.  For example, time and material contract revenues are recognized based on purchasing and employee time records.
	For all of its contracts, the Company includes any provision for estimated losses on uncompleted contracts in accrued expenses. Changes in job performance, job conditions and estimated profitability, including those arising from final contract settlements, may result in revisions to costs and income. These revisions are recognized in the period in which the revisions are identified.
	The Company considers unapproved change orders to be contract variations for which it has customer approval for a change in scope but for which it does not have an agreed upon price change.  Costs associated with unapproved change orders are included in the estimated cost to complete the contracts and are treated as project costs as incurred. The Company recognizes revenue equal to costs incurred on unapproved change orders when realization of price approval is probable.  Unapproved change orders involve the use of estimates, and it is reasonably possible that revisions to the estimated costs and recoverable amounts may be required in future reporting periods to reflect changes in estimates or final agreements with customers.
	The Company considers claims to be amounts it seeks, or will seek, to collect from customers or others for customer-caused changes in contract specifications or design, or other customer-related causes of unanticipated additional contract costs on which there is no agreement with customers on both scope and price changes. Claims are included in the calculation of revenues when realization is probable and amounts can be reliably determined. Revenues in excess of contract costs incurred on claims are recognized when the amounts have been agreed upon with the customer.  Revenue in excess of contract costs from claims is recognized when an agreement is reached with customers as to the value of the claims, which in some instances may not occur until after completion of work under the contract. Costs associated with claims are included in the estimated costs to complete the contracts and are treated as project costs when incurred.
	The caption “Costs and estimated earnings in excess of billings” in the consolidated balance sheet represents unbilled receivables which arise when revenues have been recorded but the amount will not be billed until a later date.  Balances represent:  (a) unbilled amounts arising from the use of the percentage-of-completion method of accounting which may not be billed under the terms of the contract until a later date, (b) incurred costs to be billed under cost reimbursement type contracts, (c) amounts arising from routine lags in billing, or (d) the revenue associated with unapproved change orders or claims when realization is probable and amounts can be reliably determined.  For those contracts in which billings exceed contract revenues recognized to date, the excess amounts are included in the caption “Billings in excess of costs and estimated earnings”.
	In accordance with applicable terms of certain construction contracts, retainage amounts may be withheld by customers until completion and acceptance of the project.  Some payments of the retainage may not be received for a significant period after completion of our portion of a project.  In some jurisdictions, retainage amounts are deposited into an escrow account.
Significant revision in contract estimate	'
	Significant revision in contract estimate— As previously discussed, revenue recognition is based on the percentage-of-completion method for firm fixed-price contracts. Under this method, the costs incurred to date as a percentage of total estimated costs are used to calculate revenue. Total estimated costs, and thus contract revenues and margin, are impacted by many factors which can cause significant changes in estimates during the life cycle of a project.
	For projects that were in process in the prior year, but are either completed or continue to be in process during the current year, there can be a difference in revenues and profits recognized to the prior year, had current year estimates of costs to complete been known in the prior year.
Customer concentration	'
	Customer Concentration — The Company operates in multiple industry segments encompassing the construction of industrial and public works infrastructure assets throughout primarily the United States. Typically, the top ten customers in any one calendar year generate revenues in excess of 50% of total revenues; however in most years a different group make up the top ten customers.
	During the three months ending March 31, 2014, revenues generated by the top ten customers were $283 million, which represented 60.1% of total revenues during the period.  During that period, a large solar electric plant represented 12.7% of total revenues and TX DOT represented 9.3% of total revenues.
	During the three months ending March 31, 2013, revenues generated by the top ten customers were $227 million, which represented 55.4% of total revenues during the period.  During that period, a large gas and electric utility represented 8.5% of total revenues and a large pipeline company represented 7.3% of total revenues.
	At March 31, 2014, approximately 12.7% of the Company’s accounts receivable were due from one customer, and that customer provided 12.7% of the Company’s revenues for the three months ended March 31, 2014.  At March 31, 2013, approximately 8.2% of the Company’s accounts receivable were due from one customer, and that customer provided 7.3% of the Company’s revenues for the three months ended March 31, 2013.
Multiemployer plans	'
	Multiemployer Plans— Various subsidiaries in the West Construction Services segment are signatories to collective bargaining agreements.  These agreements require that the Company participate in and contribute to a number of multiemployer benefit plans for its union employees at rates determined by the agreements.  The trustees for each multiemployer plan determine the eligibility and allocations of contributions and benefit amounts, determine the types of benefits and administer the plan.  Federal law requires that if the Company were to withdraw from an agreement, it will incur a withdrawal obligation.  The potential withdrawal obligation may be significant.  Any withdrawal liability would be recorded when it is probable that a liability exists and can be reasonably estimated, in accordance with generally accepted accounting principles (“GAAP”).  In November 2011, the Company withdrew from the Central States Southeast and Southwest Areas Pension Fund multiemployer pension plan.  The Company has no plans to withdraw from any other agreements.  See Note 19 — “Commitments and Contingencies”.
Inventory and uninstalled contract materials	'
	Inventory and uninstalled contract materials — Inventory consists of expendable construction materials and small tools that will be used in construction projects and is valued at the lower of cost, using first-in, first-out method, or market.  Uninstalled contract materials include certain job specific materials not yet installed which are valued using the specific identification method relating the inventory cost to a specific project.

Nature_of_Business_Tables

Nature of Business (Tables)	3 Months Ended
	Mar. 31, 2014
Nature of Business	'
Schedule of list of primary operating subsidiaries and their reportable operating segment	'
	Subsidiary	Operating Segment
	ARB, Inc. (“ARB”)	West Construction Services
	ARB Structures, Inc.	West Construction Services
	Q3 Contracting, Inc. (“Q3C”); acquired 2012	West Construction Services
	Rockford Corporation (“Rockford”)	West Construction Services
	Stellaris, LLC.	West Construction Services
	OnQuest, Inc.	Engineering
	OnQuest, Canada, ULC (Born Heaters Canada, ULC prior to 2013)	Engineering
	Cardinal Contractors, Inc.	East Construction Services
	James Construction Group, LLC (“JCG”)	East Construction Services
	Silva Group (“Silva”); acquired 2012	East Construction Services
	Primoris Energy Services Corporation (“PES”)	East Construction Services

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2014
Fair Value Measurements	'
Schedule of financial assets and liabilities which are required to be measured at fair value	'
					Fair Value Measurements at Reporting Date
		Amount			Quoted Prices		Significant	Significant
		Recorded			in Active Markets		Other	Unobservable
		on Balance			for Identical Assets		Observable	Inputs
		Sheet			(Level 1)		Inputs	(Level 3)
							(Level 2)
	Assets as of March 31, 2014:
	Cash and cash equivalents	$	149,620		$	149,620	—	—
	Short-term investments	$	17,326		$	17,326	—	—
	Liabilities as of March 31, 2014:
	Contingent consideration	$	4,347		—		—	$	4,347
	Assets as of December 31, 2013:
	Cash and cash equivalents	$	196,077		$	196,077	—	—
	Short-term investments	$	18,686		$	18,686	—	—
	Liabilities as of December 31, 2013:
	Contingent consideration	$	9,233		—		—	$	9,233
Schedule of changes to the Company's contingent consideration liability Level 3 fair value measurements	'
	Contingent Consideration
	Balance at December 31, 2013	$	9,233
	Additions:
	Change in fair value of contingent consideration	114
	Reductions:
	Payment to Q3C sellers	(5,000		)
	Balance at March 31, 2014	$	4,347

Accounts_Receivable_Tables

Accounts Receivable (Tables)	3 Months Ended
	Mar. 31, 2014
Accounts Receivable	'
Summary of accounts receivable	'
		March 31,		December 31,
		2014		2013
	Contracts receivable, net of allowance for doubtful accounts of $672 at March 31, 2014 and $692 at December 31, 2013	$	233,932	$	257,354
	Retention receivable	54,850		47,054
		288,782		304,408
	Other accounts receivable	342		547
		$	289,124	$	304,955

Costs_and_Estimated_Earnings_o1

Costs and Estimated Earnings on Uncompleted Contracts (Tables)	3 Months Ended
	Mar. 31, 2014
Costs and Estimated Earnings on Uncompleted Contracts	'
Schedule of costs and estimated earnings on uncompleted contracts	'
		March 31,			December 31,
		2014			2013
	Costs incurred on uncompleted contracts	$	3,722,890		$	4,741,249
	Gross profit recognized	432,568			582,430
		4,155,458			5,323,679
	Less: billings to date	(4,227,692		)	(5,439,898		)
		$	(72,234	)	$	(116,219	)
Schedule of costs and estimated earnings on uncompleted contracts included in consolidated balance sheet	'
		March 31,			December 31,
		2014			2013
	Costs and estimated earnings in excess of billings	$	75,067		$	57,146
	Billings in excess of costs and estimated earnings	(147,301		)	(173,365		)
		$	(72,234	)	$	(116,219	)

Equity_Method_Investments_Tabl

Equity Method Investments (Tables) (WesPac & WesPac-Midstream)	3 Months Ended
	Mar. 31, 2014
WesPac & WesPac-Midstream	'
Equity method investments	'
Summary of the financial position and results	'
		March 31,			December 31,
		2014			2013
	Balance sheet data
	Assets	$	24,928		$	19,142
	Liabilities	852			1,023
	Net assets	$	24,076		$	18,119
	Company’s equity investment in venture	$	—		$	—
		Three months ended
		March 31,
		2014			2013
	Earnings data:
	Revenue	$	3		$	39
	Expenses	$	190		$	231
	Earnings before taxes	$	(187	)	$	(192	)
	Company’s equity in earnings	$	—		$	(96	)

Business_Combinations_Tables

Business Combinations (Tables)	3 Months Ended
	Mar. 31, 2014
Business Combinations	'
Schedule of pro forma results	'
		Three months
		ended March 31,
		2014		2013
	Revenues	470,074		412,794
	Income before provision for income taxes	18,355		16,132
	Net income attributable to Primoris	10,833		9,700
	Weighted average common shares outstanding:
	Basic	51,610		51,456
	Diluted	51,714		51,467
	Earnings per share:
	Basic	$	0.21	$	0.19
	Diluted	$	0.21	$	0.19

Intangible_Assets_Tables

Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2014
Intangible Assets	'
Summary of intangible asset categories, amounts and the average amortization periods	'
		Amortization		March 31,		December 31,
		Period		2014		2013
	Tradename	3 to 10 years		$	20,041	$	21,023
	Non-compete agreements	2 to 5 years		$	2,093	$	2,575
	Customer relationships	5 to 15 years		$	21,326	$	21,705
	Total			$	43,460	$	45,303
Schedule of estimated amortization expense for intangible assets	'
	For the Years Ending	Estimated
	December 31,	Intangible
		Amortization
		Expense
	2014 (remaining nine months)	$	5,899
	2015	5,921
	2016	5,451
	2017	5,386
	2018	5,307
	Thereafter	15,496
		$	43,460

Accounts_Payable_and_Accrued_L1

Accounts Payable and Accrued Liabilities (Tables)	3 Months Ended
	Mar. 31, 2014
Accounts Payable and Accrued Liabilities	'
Summary of accrued expenses and other current liabilities	'
		March 31,		December 31,
		2014		2013
	Payroll and related employee benefits	$	35,618	$	36,556
	Insurance, including self-insurance reserves	35,405		33,880
	Reserve for estimated losses on uncompleted contracts	274		1,392
	Corporate income taxes and other taxes	14,783		13,305
	Accrued overhead cost	759		1,165
	Other	4,720		4,781
		$	91,559	$	91,079

Noncontrolling_Interests_Table

Noncontrolling Interests (Tables)	3 Months Ended
	Mar. 31, 2014
Noncontrolling Interests	'
Schedule of the Blythe joint venture operating activities included in the Company's consolidated statements of income	'
		March 31,		March 31,
		2014		2013
	Revenues	$	940	$	16,272
	Net income attributable to noncontrolling interests	432		270
Schedule of the carrying value of the assets and liabilities associated with the operations of the Blythe joint venture included in the Company's consolidated balance sheets	'
		March 31,		December 31,
		2014		2013
	Cash	$	1,088	$	3,025
	Accounts receivable	—		1,085
	Current liabilities	405		2,041

Dividends_and_Earnings_Per_Sha1

Dividends and Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2014
Dividends and Earnings Per Share	'
Schedule of computation of basic and diluted earnings per share	'
		Three months
		ended March 31,
		2014		2013
	Numerator:
	Net income attributable to Primoris	$	10,833	$	9,770
	Denominator:
	Weighted average shares for computation of basic earnings per share	51,610		51,456
	Dilutive effect of shares issued to independent directors	—		9
	Dilutive effect of unvested restricted stock units (1)	104		—
	Dilutive effect of shares to be issued to Q3C sellers (2)	—		2
	Weighted average shares for computation of diluted earnings per share	51,714		51,467
	Earnings per share:
	Basic	$	0.21	$	0.19
	Diluted	$	0.21	$	0.19
	(1)         Represents the dilutive effect of a grant for 100,000 shares of Units on May 3, 2013 and 48,512 shares of Units on March 24, 2014.
	(2)         Represents the dilutive effect of 29,273 unregistered shares of common stock provided in January 2013 as part of the purchase consideration for the Q3C acquisition.

Reportable_Operating_Segments_

Reportable Operating Segments (Tables)	3 Months Ended
	Mar. 31, 2014
Reportable Operating Segments	'
Schedule of revenue by segment	'
		For the three months ended March 31,
		2014				2013
	Segment	Revenue		% of		Revenue		% of
				Segment				Segment
				Revenue				Revenue
	East	$	223,072	47.5	%	$	190,211	46.4	%
	West	234,026		49.7	%	207,686		50.6	%
	Engineering	12,976		2.8	%	12,098		3	%
	Total	$	470,074	100	%	$	409,995	100	%
Schedule of gross profit by segment	'
		For the three months ended March 31,
		2014				2013
	Segment	Gross		% of		Gross		% of
		Profit		Segment		Profit		Segment
				Revenue				Revenue
	East	$	16,017	7.2	%	$	14,995	7.9	%
	West	31,673		13.5	%	28,749		13.8	%
	Engineering	2,067		15.9	%	2,352		19.4	%
	Total	$	49,757	10.6	%	$	46,096	11.2	%
Schedule of amount of goodwill recorded by segment	'
	Segment	March 31,		December 31,
		2014		2013
	East	$	70,946	$	70,946
	West	45,239		45,239
	Engineering	2,441		2,441
	Total	$	118,626	$	118,626
Schedule of revenue and total assets by geographic area	'
		External Revenues
		For the three months ended March 31,
		2014				2013				Total Assets
	Country:	Revenue		% of		Revenue		% of		March 31,		December 31,
				Revenue				Revenue		2014		2013
	United States	$	465,244	99	%	$	405,163	98.8	%	$	996,055	$	1,039,322
	Non-United States	4,830		1		4,832		1.2		10,897		11,371
	Total	$	470,074	100	%	$	409,995	100	%	$	1,006,952	$	1,050,693

Nature_of_Business_Details

Nature of Business (Details) (USD $)	24 Months Ended		0 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Jan. 02, 2014	Jan. 22, 2014
	PES	Blythe	BWP
	item		Blaus Wasser, LLC
Nature of Business	'	'	'
Number of Businesses Acquired	2	'	'
Ownership percentage	'	50.00%	'
Amount of purchase of assets and liabilities.	'	'	$5,000

Basis_of_Presentation_Details

Basis of Presentation (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Customer concentration	'	'
Revenues	$470,074	$409,995
Revenues | Customer concentration | Top ten customers	'	'
Customer concentration	'	'
Number of top customers	10	10
Number of calendar years in which top customers typically generate minimum specified percentage of revenue	1	'
Revenues	$283,000	$227,000
Percentage of concentration risk	60.10%	55.40%
Revenues | Customer concentration | Top ten customers | Minimum	'	'
Customer concentration	'	'
Minimum percentage of revenues generated by top ten customers	50.00%	'
Revenues | Customer concentration | Large solar electric plant	'	'
Customer concentration	'	'
Percentage of concentration risk	12.70%	8.50%
Revenues | Customer concentration | One customer	'	'
Customer concentration	'	'
Percentage of concentration risk	12.70%	7.30%
Revenues | Customer concentration | Large gas pipeline company	'	'
Customer concentration	'	'
Percentage of concentration risk	'	7.30%
Revenues | Customer concentration | TX DOT	'	'
Customer concentration	'	'
Percentage of concentration risk	9.30%	'
Accounts receivable | Customer concentration | One customer	'	'
Customer concentration	'	'
Percentage of concentration risk	12.70%	8.20%
Number of customers	1	1

Fair_Value_Measurements_Detail

Fair Value Measurements (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Assets	'	'
Short-term investments	$17,326	$18,686
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)	'	'
Assets	'	'
Cash and cash equivalents	149,620	196,077
Short-term investments	17,326	18,686
Recurring | Significant Unobservable Inputs (Level 3)	'	'
Liabilities	'	'
Contingent consideration	4,347	9,233
Recurring | Amount Recorded on Balance Sheet	'	'
Assets	'	'
Cash and cash equivalents	149,620	196,077
Short-term investments	17,326	18,686
Liabilities	'	'
Contingent consideration	$4,347	$9,233

Fair_Value_Measurements_Detail1

Fair Value Measurements (Details 2) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Rollforward of contingent consideration liability level three fair value measurements	'	'
Change in fair value of contingent consideration	($4,886)	$356
Contingent Consideration Liability	'	'
Rollforward of contingent consideration liability level three fair value measurements	'	'
Balance at the beginning of the period	9,233	'
Change in fair value of contingent consideration	114	'
Balance at the end of the period	4,347	'
Additional information	'	'
Number of unobservable inputs	2	'
Minimum probability of acquired entity meeting contractual operating performance target (as a percent)	33.00%	'
Maximum probability of acquired entity meeting contractual operating performance target (as a percent)	100.00%	'
Contingent Consideration Liability | Q3C Contracting, Inc	'	'
Rollforward of contingent consideration liability level three fair value measurements	'	'
Payments	($5,000)	'

Accounts_Receivable_Details

Accounts Receivable (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Accounts Receivable	'	'
Contracts receivable, net of allowance for doubtful accounts	$233,932	$257,354
Retention receivable	54,850	47,054
Contracts receivable and retention	288,782	304,408
Other accounts receivable	342	547
Accounts receivable, net	289,124	304,955
Allowance for doubtful accounts	$672	$692

Costs_and_Estimated_Earnings_o2

Costs and Estimated Earnings on Uncompleted Contracts (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Costs and Estimated Earnings on Uncompleted Contracts	'	'
Costs incurred on uncompleted contracts	$3,722,890	$4,741,249
Gross profit recognized	432,568	582,430
Costs and Estimated Earnings on Uncompleted Contracts	4,155,458	5,323,679
Less: billings to date	-4,227,692	-5,439,898
Net cost and estimated earnings in excess of billings	-72,234	-116,219
Amount included in consolidated balance sheet	'	'
Costs and estimated earnings in excess of billings	75,067	57,146
Billings in excess of costs and estimated earnings	-147,301	-173,365
Net cost and estimated earnings in excess of billings	($72,234)	($116,219)

Equity_Method_Investments_Deta

Equity Method Investments (Details) (USD $)

3 Months Ended

0 Months Ended

3 Months Ended

0 Months Ended

3 Months Ended

3 Months Ended

0 Months Ended

In Thousands, unless otherwise specified

Mar. 31, 2014

Mar. 31, 2013

Sep. 30, 2013

Jul. 01, 2010

Jul. 01, 2010

Mar. 31, 2014

Mar. 31, 2013

Dec. 31, 2013

Feb. 05, 2014

Mar. 31, 2014

Nov. 17, 2012

Mar. 31, 2014

Mar. 31, 2013

Mar. 31, 2014

Mar. 31, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

WPE, Kealine and the Company

WesPac

WesPac

WesPac-Energy & WesPac-Midstream

WesPac-Energy & WesPac-Midstream

WesPac-Energy & WesPac-Midstream

Alvah, Inc.

Alvah, Inc.

Alvah, Inc.

Alvah, Inc.

Alvah, Inc.

Alvah, Inc.

Alvah, Inc.

Midstream

Midstream

Midstream

Midstream

Highstar

Kealine

ARB

ARB

Q3C

Q3C

project

Highstar

Kealine

Company

Maximum

Equity method investments

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Membership interest (as a percent)

'

'

'

50.00%

50.00%

'

'

'

'

'

49.00%

'

'

'

'

'

'

'

'

Cash proceeds from sale of projects

'

'

$6,082

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum potential bonus payments under the agreement based on attainment of milestones

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5,750

9,000

Amount of reduced potential bonus payments if project not achieving milestone by July, 2014

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

4,500

'

'

'

Number of projects for which milestones must be attained for the potential bonus payments

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2

'

'

'

Funding period

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'2 years

'

'

Cash paid by majority owner to purchase the Company's minority interest

1,189

'

'

'

'

'

'

'

1,189

'

'

'

'

'

'

'

'

'

'

Balance sheet data

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Assets

'

'

'

'

'

24,928

'

19,142

'

'

'

'

'

'

'

'

'

'

'

Liabilities

'

'

'

'

'

852

'

1,023

'

'

'

'

'

'

'

'

'

'

'

Net assets

'

'

'

'

'

24,076

'

18,119

'

'

'

'

'

'

'

'

'

'

'

Earnings data:

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Revenue

'

'

'

'

'

3

39

'

'

'

'

'

'

'

'

'

'

'

'

Expenses

'

'

'

'

'

190

231

'

'

'

'

'

'

'

'

'

'

'

'

Earnings before taxes

'

'

'

'

'

-187

-192

'

'

'

'

'

'

'

'

'

'

'

'

Company's equity in earnings

14

269

'

'

'

'

-96

'

'

14

'

'

'

'

'

'

'

'

'

Payments made to equity method investee

'

'

'

'

'

'

'

'

'

'

'

$1,336

$1,486

$0

$1,245

'

'

'

'

Business_Combinations_Details

Business Combinations (Details) (FSSI acquisition, USD $)	0 Months Ended
In Thousands, unless otherwise specified	Mar. 11, 2013
	item
2013 Acquisition - FSSI	'
Fair value of consideration	$2,377
Number of future potential payments based on agreed upon contingencies	3
Estimated fair value of the potential contingent consideration	702
Non-competition and non-solicitation agreement with a key employee	'
2013 Acquisition - FSSI	'
Initial payment	1,000
Period of employment, non-competition and non-solicitation agreement with a key employee	'5 years
Amortization period of agreement	'5 years
Earnout target period for remainder of the year ending December 31, 2013 | Minimum	'
2013 Acquisition - FSSI	'
Pretax income threshold for measuring financial performance	553
2013 earnout target	'
2013 Acquisition - FSSI	'
Contingent consideration in cash	500
2014 earnout target	'
2013 Acquisition - FSSI	'
Contingent consideration in cash	500
2014 earnout target | Minimum	'
2013 Acquisition - FSSI	'
Pretax income threshold for measuring financial performance	2,502
2015 earnout target	'
2013 Acquisition - FSSI	'
Contingent consideration in cash	500
2015 earnout target | Minimum	'
2013 Acquisition - FSSI	'
Pretax income threshold for measuring financial performance	$4,227

Business_Combinations_Details_

Business Combinations (Details 2) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Pro forma results	'	'
Percentage of pro forma tax rate used in calculating taxes on income from continuing operations	39.00%	39.00%
Revenues	$470,074	$412,794
Income before provision for income taxes	18,355	16,132
Net income attributable to Primoris	$10,833	$9,700
Weighted average common shares outstanding:	'	'
Basic (in shares)	51,610	51,456
Diluted (in shares)	51,714	51,467
Earnings per share:	'	'
Basic (in dollars per share)	$0.21	$0.19
Diluted (in dollars per share)	$0.21	$0.19

Intangible_Assets_Details

Intangible Assets (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Intangible assets	'	'	'
Intangible assets, net	$43,460	'	$45,303
Amortization expense of intangible assets	1,843	1,794	'
Estimated future amortization expense for intangible assets	'	'	'
2014 (remaining nine months)	5,899	'	'
2015	5,921	'	'
2016	5,451	'	'
2017	5,386	'	'
2018	5,307	'	'
Thereafter	15,496	'	'
Total	43,460	'	45,303
Tradename	'	'	'
Intangible assets	'	'	'
Intangible assets, net	20,041	'	21,023
Estimated future amortization expense for intangible assets	'	'	'
Total	20,041	'	21,023
Tradename | Minimum	'	'	'
Intangible assets	'	'	'
Amortization Period	'3 years	'	'
Tradename | Maximum	'	'	'
Intangible assets	'	'	'
Amortization Period	'10 years	'	'
Non-compete agreements	'	'	'
Intangible assets	'	'	'
Intangible assets, net	2,093	'	2,575
Estimated future amortization expense for intangible assets	'	'	'
Total	2,093	'	2,575
Non-compete agreements | Minimum	'	'	'
Intangible assets	'	'	'
Amortization Period	'2 years	'	'
Non-compete agreements | Maximum	'	'	'
Intangible assets	'	'	'
Amortization Period	'5 years	'	'
Customer relationship	'	'	'
Intangible assets	'	'	'
Intangible assets, net	21,326	'	21,705
Estimated future amortization expense for intangible assets	'	'	'
Total	$21,326	'	$21,705
Customer relationship | Minimum	'	'	'
Intangible assets	'	'	'
Amortization Period	'5 years	'	'
Customer relationship | Maximum	'	'	'
Intangible assets	'	'	'
Amortization Period	'15 years	'	'

Accounts_Payable_and_Accrued_L2

Accounts Payable and Accrued Liabilities (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Accounts Payable and Accrued Liabilities	'	'
Retention amounts included in accounts payable	$6,233	$5,602
Accrued expenses and other current liabilities	'	'
Payroll and related employee benefits	35,618	36,556
Insurance, including self-insurance reserves	35,405	33,880
Reserve for estimated losses on uncompleted contracts	274	1,392
Corporate income taxes and other taxes	14,783	13,305
Accrued overhead cost	759	1,165
Other	4,720	4,781
Total accrued expenses and other current liabilities	$91,559	$91,079

Credit_Arrangements_Details

Credit Arrangements (Details)

3 Months Ended

3 Months Ended

0 Months Ended

3 Months Ended

3 Months Ended

3 Months Ended

3 Months Ended

Mar. 31, 2014

Dec. 28, 2012

Mar. 31, 2014

Jul. 25, 2013

Dec. 28, 2012

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Senior Notes

Senior Notes

Senior Notes

Notes Agreement

Notes Agreement

Notes Agreement

Credit Agreement

Credit Agreement

Credit Agreement

Credit Agreement

Credit Agreement

Credit Agreement

Credit Agreement

Credit Agreement

Credit Agreement

Canadian Credit Facility

Canadian Credit Facility

Canadian Credit Facility

USD ($)

USD ($)

Minimum

USD ($)

USD ($)

Minimum

USD ($)

LIBOR

Base rate

Federal funds rate

Prime rate

Minimum

Revolving line of credit

Commercial letters of credit

Commercial letters of credit

Commercial letters of credit

Commercial letters of credit

Commercial letters of credit

USD ($)

payment

USD ($)

USD ($)

USD ($)

USD ($)

CAD

CAD

Maximum

Credit arrangements

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum borrowing capacity

'

'

'

'

'

'

$75,000,000

'

'

'

'

'

$75,000,000

'

'

8,000,000

'

'

Incremental maximum borrowing capacity

'

'

'

'

'

'

50,000,000

'

'

'

'

'

'

'

'

'

'

'

Variable rate basis

'

'

'

'

'

'

'

'LIBOR

'Base Rate

'Federal Funds Rate

'prime rate

'

'

'

'

'

'

'

Basis spread on variable rate (as a percent)

'

'

'

'

'

'

'

'

'

0.50%

'

'

'

'

'

'

'

'

Prepayment to be paid on debt

'

'

5,000,000

'

'

'

'

'

'

'

'

5,000,000

'

'

'

'

'

'

Interest rate (as a percent)

3.65%

'

'

3.85%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Restrictions on investments, change of control provisions and provisions as a percentage of total assets to be disposed off

'

'

'

'

'

20.00%

'

'

'

'

'

20.00%

'

'

'

'

'

'

Total commercial letters of credit outstanding

'

'

'

'

'

'

'

'

'

'

'

'

'

4,808,000

5,074,000

3,079,000

2,788,000

'

Available borrowing capacity

'

'

'

'

'

'

70,192,000

'

'

'

'

'

'

'

'

4,921,000

'

'

Borrowings outstanding

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

'

'

'

Term of credit facility

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'5 years

Annual fee (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.00%

'

'

Required principal payment

7,100,000

'

'

3,600,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Initial principal amount

'

$50,000,000

'

$25,000,000

$25,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of annual principal payments

'

'

'

7

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Noncontrolling_Interests_Detai

Noncontrolling Interests (Details) (USD $)	3 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Noncontrolling Interests	'	'	'
Revenues	$470,074	$409,995	'
Net income attributable to noncontrolling interests	432	270	'
Tax effect on income recognized	7,090	6,207	'
Accounts receivable	289,124	'	304,955
Current liabilities	394,344	'	430,314
Blythe joint venture | Primary beneficiary	'	'	'
Noncontrolling Interests	'	'	'
Revenues	940	16,272	'
Net income attributable to noncontrolling interests	432	270	'
Tax effect on income recognized	0	'	'
Distributions to non-controlling interests	1,125	0	'
Distributions from joint venture	1,125	0	'
Capital contributions	0	'	0
Cash	1,088	'	3,025
Accounts receivable	'	'	1,085
Current liabilities	$405	'	$2,041

Contingent_Earnout_Liabilities1

Contingent Earnout Liabilities (Details) (USD $)	1 Months Ended		3 Months Ended		1 Months Ended
In Thousands, unless otherwise specified	Apr. 30, 2013	Apr. 30, 2013	Mar. 31, 2014	Mar. 31, 2014	Mar. 31, 2014
	Rockford	Sprint sellers	Saxon	Q3C	Q3C
	2012 earnout target	2012 earnout target	2013 earnout target	2014 earnout target	2013 earnout target
Contingent earnout liabilities	'	'	'	'	'
Cash paid	$6,900	$4,000	$0	'	$5,000
Potential contingent consideration	'	'	'	5,000	'
Estimated fair value of the potential contingent consideration	'	'	'	$4,347	'

Related_Party_Transactions_Det

Related Party Transactions (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Related party transactions	'	'
Lease payments to related party	$380	$399
SIGI	'	'
Related party transactions	'	'
Lease payments to related party	219	235
Roger Newnham	'	'
Related party transactions	'	'
Lease payments to related party	72	75
Lemmie Rockford	'	'
Related party transactions	'	'
Lease payments to related party	23	23
Quality RE Partners	'	'
Related party transactions	'	'
Lease payments to related party	$66	$66
Number of former shareholders owning leased property	3	'
Number of current employees owning leased property	2	'

StockBased_Compensation_Detail

Stock-Based Compensation (Details) (Equity Plan, Restricted Stock Units, USD $)	0 Months Ended		3 Months Ended
	Mar. 24, 2014	3-May-13	Mar. 31, 2014
Equity Plan | Restricted Stock Units	'	'	'
Stock-based compensation	'	'	'
Shares granted	48,512	100,000	148,512
Number of equal installments to vest units over the service period	'	4	'
Units Vesting percentage on September 23,2015	'	'	50.00%
Units remaining vesting percentage on March 23,2017	'	'	50.00%
Number of shares of common stock issued for each unit when vested	'	1	'
Compensation expense recognized	'	'	$137,000
Unrecognized compensation expense	'	'	$3,190,000
Period to recognize unrecognized compensation expense	'	'	'3 years 1 month 6 days
Accrued dividend equivalent units	'	'	0

Income_Taxes_Details

Income Taxes (Details)	3 Months Ended
	Mar. 31, 2014
Income Taxes	'
Effective tax rate on income before taxes and noncontrolling interests (as a percent)	38.17%
Effective tax rate for income attributable to Primoris (as a percent)	39.56%
U.S. federal statutory rate (as a percent)	35.00%
Minimum period of statute of limitations of state and foreign jurisdictions	'3 years
Maximum period of statute of limitations of state and foreign jurisdictions	'5 years

Dividends_and_Earnings_Per_Sha2

Dividends and Earnings Per Share (Details) (USD $)	0 Months Ended				3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Apr. 15, 2014	Feb. 26, 2014	Jan. 15, 2014	Oct. 30, 2013	Mar. 31, 2014	Mar. 31, 2013
Dividends and Earnings Per Share	'	'	'	'	'	'
Cash dividend declared (in dollars per share)	'	$0.04	'	$0.04	'	'
Total dividend paid	$1,808	'	$1,805	'	$1,805	'
Numerator:	'	'	'	'	'	'
Net income attributable to Primoris	'	'	'	'	$10,833	$9,770
Denominator:	'	'	'	'	'	'
Weighted average shares for computation of basic earnings per share	'	'	'	'	51,610	51,456
Dilutive effect of shares issued to independent directors	'	'	'	'	'	9
Dilutive effect of unvested restricted stock units	'	'	'	'	104	'
Dilutive effect of shares to be issued to Q3C sellers	'	'	'	'	'	2
Weighted average shares for computation of diluted earnings per share	'	'	'	'	51,714	51,467
Earnings per share:	'	'	'	'	'	'
Basic (in dollars per share)	'	'	'	'	$0.21	$0.19
Diluted (in dollars per share)	'	'	'	'	$0.21	$0.19

Dividends_and_Earnings_Per_Sha3

Dividends and Earnings Per Share (Details 2) (Q3 Contracting)	1 Months Ended
	Jan. 31, 2013
Q3 Contracting	'
Earnings per share	'
Number of unregistered shares of common stock issued	29,273

Stockholders_Equity_Details

Stockholders' Equity (Details) (USD $)	1 Months Ended					0 Months Ended		3 Months Ended	1 Months Ended
	Mar. 31, 2014	Feb. 28, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013	Mar. 24, 2014	3-May-13	Mar. 31, 2014	Jan. 31, 2013	Jan. 07, 2013	Dec. 31, 2012
				LTR Plan	LTR Plan	Equity Plan	Equity Plan	Equity Plan	Q3 Contracting	Q3 Contracting	Q3 Contracting
						Restricted Stock Units	Restricted Stock Units	Restricted Stock Units
Stockholders' equity	'	'	'	'	'	'	'	'	'	'	'
Amount received in exchange for shares of common stock under a long-term incentive plan	'	'	'	$1,671,000	$1,455,000	'	'	'	'	'	'
Shares of common stock purchased under the long-term incentive plan	'	'	'	77,455	131,989	'	'	'	'	'	'
Discounted price from market price at which shares purchased by participants in LTR Plan (as a percent)	'	'	'	75.00%	'	'	'	'	'	'	'
Shares of common stock issued as a part of quarterly compensation of non-employee members of the Board of Directors	6,375	'	12,480	'	'	'	'	'	'	'	'
Stock issued to sellers (in shares)	'	'	'	'	'	'	'	'	29,273	'	'
Price of shares issued (in dollars per share)	'	'	'	'	'	'	'	'	'	'	$14.69
Stock issued for acquisition	'	'	'	'	'	'	'	'	'	430,000	'
Shares granted	'	'	'	'	'	48,512	100,000	148,512	'	'	'
Aggregate purchase price up to which shares can be acquired under share repurchase program	'	$23,000,000	'	'	'	'	'	'	'	'	'

Commitments_and_Contingencies_

Commitments and Contingencies (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Commitments and Contingencies.	'	'
Total lease expense	$3,637	$3,845
Lease payments to related party	$380	$399

Commitments_and_Contingencies_1

Commitments and Contingencies (Details 2) (USD $)	Nov. 30, 2011	Feb. 07, 2012	Mar. 31, 2014	Mar. 31, 2013	Nov. 30, 2012	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified		James Construction Group LLC	Q3C	Q3C	Q3C	Letters of credit	Letters of credit	Bonding	Bonding
		North Texas Tollway Authority v. James Construction Group, LLC
		wall
Commitments and contingencies	'	'	'	'	'	'	'	'	'
Total commercial letters of credit outstanding	'	'	'	'	'	$7,595	$7,696	'	'
Cost to repair retaining wall	'	5,400	'	'	'	'	'	'	'
Number of other walls constructed on the project, which could have potential exposure to failure	'	6	'	'	'	'	'	'	'
Bid and completion bonds issued and outstanding	'	'	'	'	'	'	'	1,336,007	1,458,744
Withdrawal liability recorded	7,500	'	'	119	85	'	'	'	'
Total of monthly payments towards the liability amount	'	'	$19	'	'	'	'	'	'

Reportable_Operating_Segments_1

Reportable Operating Segments (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
	segment
Reportable Operating Segments	'	'	'
Number of operating segments	3	'	'
Segment reporting information	'	'	'
Revenue	$470,074	$409,995	'
% of Segment Revenue	100.00%	100.00%	'
Gross Profit	49,757	46,096	'
% of Segment Revenue	10.60%	11.20%	'
Goodwill	118,626	'	118,626
East	'	'	'
Segment reporting information	'	'	'
Revenue	223,072	190,211	'
% of Segment Revenue	47.50%	46.40%	'
Gross Profit	16,017	14,995	'
% of Segment Revenue	7.20%	7.90%	'
Goodwill	70,946	'	70,946
West	'	'	'
Segment reporting information	'	'	'
Revenue	234,026	207,686	'
% of Segment Revenue	49.70%	50.60%	'
Gross Profit	31,673	28,749	'
% of Segment Revenue	13.50%	13.80%	'
Goodwill	45,239	'	45,239
Engineering	'	'	'
Segment reporting information	'	'	'
Revenue	12,976	12,098	'
% of Segment Revenue	2.80%	3.00%	'
Gross Profit	2,067	2,352	'
% of Segment Revenue	15.90%	19.40%	'
Goodwill	$2,441	'	$2,441

Reportable_Operating_Segments_2

Reportable Operating Segments (Details 2) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Revenues and total assets by geographic area	'	'	'
Revenue	$470,074	$409,995	'
% of Revenue	100.00%	100.00%	'
Total Assets	1,006,952	'	1,050,693
United States	'	'	'
Revenues and total assets by geographic area	'	'	'
Revenue	465,244	405,163	'
% of Revenue	99.00%	98.80%	'
Total Assets	996,055	'	1,039,322
Non-United States	'	'	'
Revenues and total assets by geographic area	'	'	'
Revenue	4,830	4,832	'
% of Revenue	1.00%	1.20%	'
Total Assets	$10,897	'	$11,371