Essendant (ESND) 10-K 18 Feb 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Feb. 13, 2015	Jun. 30, 2014
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	FALSE
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Trading Symbol	USTR
Entity Registrant Name	UNITED STATIONERS INC
Entity Central Index Key	355999
Current Fiscal Year End Date	-19
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		38,563,203
Entity Public Float			$1,468

CONSOLIDATED_STATEMENTS_OF_INC

CONSOLIDATED STATEMENTS OF INCOME (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Net sales	$5,327,205	$5,085,293	$5,080,106
Cost of goods sold	4,516,704	4,295,715	4,305,502
Gross profit	810,501	789,578	774,604
Operating expenses:
Warehousing, marketing and administrative expenses	592,050	580,428	573,693
Loss on sale of business	8,234
Operating income	210,217	209,150	200,911
Interest expense	16,234	12,233	23,619
Interest income	-500	-593	-343
Income before income taxes	194,483	197,510	177,635
Income tax expense	75,285	74,340	65,805
Net income	$119,198	$123,170	$111,830
Net income per share - basic:
Net income per share - basic	$3.08	$3.11	$2.77
Average number of common shares outstanding - basic	38,705	39,650	40,337
Net income per share - diluted:
Net income per share - diluted	$3.05	$3.06	$2.73
Average number of common shares outstanding - diluted	39,130	40,236	40,991

CONSOLIDATED_STATEMENTS_OF_COM

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement Of Income And Comprehensive Income [Abstract]
Net income	$25,841	$38,169	$33,331	$21,857	$34,125	$40,501	$34,670	$13,874	$119,198	$123,170	$111,830
Other comprehensive (loss) income, net of tax
Unrealized translation adjustment									-5,262	-901	1,567
Minimum pension liability adjustments									-17,044	13,194	-4,645
Unrealized interest rate swap adjustments									-597	1,584	5,719
Total other comprehensive (loss) income, net of tax									-22,903	13,877	2,641
Comprehensive income									$96,295	$137,047	$114,471

CONSOLIDATED_BALANCE_SHEETS

CONSOLIDATED BALANCE SHEETS (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets:
Cash and cash equivalents	$20,812	$22,326
Accounts receivable, less allowance for doubtful accounts of $19,725 in 2014 and $20,608 in 2013	702,527	643,379
Inventories	926,809	830,295
Other current assets	30,042	29,255
Total current assets	1,680,190	1,525,255
Property, plant and equipment, at cost
Land	13,105	13,185
Buildings	62,370	62,235
Fixtures and equipment	331,163	318,013
Leasehold improvements	29,841	28,860
Capitalized software costs	91,624	83,026
Total property, plant and equipment	528,103	505,319
Less: accumulated depreciation and amortization	389,886	362,269
Net property, plant equipment	138,217	143,050
Intangible assets, net	111,958	65,502
Goodwill	398,042	356,811
Other long-term assets	41,810	25,576
Total assets	2,370,217	2,116,194
Current liabilities:
Accounts payable	485,241	476,113
Accrued liabilities	192,792	191,531
Current maturities of long-term debt	851	373
Total current liabilities	678,884	668,017
Deferred income taxes	17,763	29,552
Long-term debt	713,058	533,324
Other long-term liabilities	104,394	59,787
Total liabilities	1,514,099	1,290,680
Stockholders’ equity:
Common stock, $0.10 par value; authorized - 100,000,000 shares, issued - 74,435,628 shares in 2014 and 2013	7,444	7,444
Additional paid-in capital	412,291	411,954
Treasury stock, at cost – 35,719,041 shares in 2014 and 34,714,083 shares in 2013	-1,042,501	-998,234
Retained earnings	1,541,675	1,444,238
Accumulated other comprehensive loss	-62,791	-39,888
Total stockholders’ equity	856,118	825,514
Total liabilities and stockholders’ equity	$2,370,217	$2,116,194

CONSOLIDATED_BALANCE_SHEETS_Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Statement Of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$19,725	$20,608
Common stock, par value	$0.10	$0.10
Common stock, authorized	100,000,000	100,000,000
Common stock, issued	74,435,628	74,435,628
Treasury stock, shares	35,719,041	34,714,083

CONSOLIDATED_STATEMENTS_OF_CHA

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (USD $)	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]
In Thousands, except Share data
Balance at Dec. 31, 2011	$704,679	$7,444	($908,667)	$409,190	($56,406)	$1,253,118
Balance (in Shares) at Dec. 31, 2011		74,435,628	-32,281,847
Net income	111,830					111,830
Unrealized translation adjustments	1,567				1,567
Minimum pension liability adjustments, net of tax benefit (loss) of $2,847, $8,397 and $10,853 in 2012, 2013 and 2014 respectively	-4,645				-4,645
Unrealized benefit on interest rate swaps, net of tax loss of $3,505, $1,008 and $0 in 2012, 2013 and 2014 respectively	5,719				5,719
Comprehensive income	114,471				2,641	111,830
Cash dividend declared, $0.53 per share, $0.56 per share and $ per share in 2012, 2013 and 2014 respectively	-21,511					-21,511
Acquisition of treasury stock	-69,908		-69,908
Acquisition of treasury stock (in shares)			-2,454,037
Stock compensation	10,361		15,355	-4,994
Stock compensation (in shares)	619,664		619,664
Balance at Dec. 31, 2012	738,092	7,444	-963,220	404,196	-53,765	1,343,437
Balance (in Shares) at Dec. 31, 2012		74,435,628	-34,116,220
Net income	123,170					123,170
Unrealized translation adjustments	-901				-901
Minimum pension liability adjustments, net of tax benefit (loss) of $2,847, $8,397 and $10,853 in 2012, 2013 and 2014 respectively	13,194				13,194
Unrealized benefit on interest rate swaps, net of tax loss of $3,505, $1,008 and $0 in 2012, 2013 and 2014 respectively	1,584				1,584
Comprehensive income	137,047				13,877	123,170
Cash dividend declared, $0.53 per share, $0.56 per share and $ per share in 2012, 2013 and 2014 respectively	-22,369					-22,369
Acquisition of treasury stock	-62,056		-62,056
Acquisition of treasury stock (in shares)	-1,684,365		-1,684,365
Stock compensation	34,800		27,042	7,758
Stock compensation (in shares)	1,086,502		1,086,502
Balance at Dec. 31, 2013	825,514	7,444	-998,234	411,954	-39,888	1,444,238
Balance (in Shares) at Dec. 31, 2013		74,435,628	-34,714,083
Net income	119,198					119,198
Unrealized translation adjustments	-5,262				-5,262
Minimum pension liability adjustments, net of tax benefit (loss) of $2,847, $8,397 and $10,853 in 2012, 2013 and 2014 respectively	-17,044				-17,044
Unrealized benefit on interest rate swaps, net of tax loss of $3,505, $1,008 and $0 in 2012, 2013 and 2014 respectively	-597				-597
Comprehensive income	96,295				-22,903	119,198
Cash dividend declared, $0.53 per share, $0.56 per share and $ per share in 2012, 2013 and 2014 respectively	-21,761					-21,761
Acquisition of treasury stock	-50,591		-50,591
Acquisition of treasury stock (in shares)	-1,255,705		-1,255,705
Stock compensation	6,661		6,324	337
Stock compensation (in shares)	250,747		250,747
Balance at Dec. 31, 2014	$856,118	$7,444	($1,042,501)	$412,291	($62,791)	$1,541,675
Balance (in Shares) at Dec. 31, 2014		74,435,628	-35,719,041

CONSOLIDATED_STATEMENTS_OF_CHA1

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Minimum pension liability adjustment, tax benefit (loss)	$10,853	($8,397)	$2,847
Unrealized benefit on interest rate swaps, tax loss	380	1,008	3,505
Cash dividend per share	$0.56	$0.56	$0.53
Accumulated Other Comprehensive Income (Loss) [Member]
Minimum pension liability adjustment, tax benefit (loss)	10,853	-8,397	2,847
Unrealized benefit on interest rate swaps, tax loss	$380	$1,008	$3,505
Retained Earnings [Member]
Cash dividend per share	$0.56	$0.56	$0.53

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash Flows From Operating Activities:
Net income	$119,198	$123,170	$111,830
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	32,381	32,153	29,994
Amortization of intangible assets	8,623	6,985	6,083
Share-based compensation	8,195	10,808	8,746
Loss (gain) on the disposition of property, plant and equipment	1,155	-57	122
Amortization of capitalized financing costs	859	1,021	995
Excess tax benefits related to share-based compensation	-1,214	-3,977	-648
Loss on sale of business	8,234
Asset impairment charge		1,183
Deferred income taxes	-6,367	-3,921	-6,713
Changes in operating assets and liabilities (net of acquisitions):
(Increase) decrease in accounts receivable, net	-16,529	14,735	21,820
(Increase) decrease in inventory	-30,319	-66,627	10,374
(Increase) decrease in other assets	-2,898	-4,224	21,105
(Decrease) increase in accounts payable	-42,093	-40,634	16,264
Increase (decrease) in checks in-transit	1,368	21,348	-32,008
Increase (decrease) in accrued liabilities	1,276	-3,648	276
(Decrease) increase in other liabilities	-4,736	-13,578	1,574
Net cash provided by operating activities	77,133	74,737	189,814
Cash Flows From Investing Activities:
Capital expenditures	-24,994	-33,789	-32,787
Proceeds from the disposition of property, plant and equipment	2,767	3,516	775
Acquisitions, net of cash acquired	-161,406		-75,254
Net cash used in investing activities	-183,633	-30,273	-107,266
Cash Flows From Financing Activities:
Net borrowings (repayments) under revolving credit facility	155,911	-31,378	-123,633
Borrowings under Receivables Securitization Program	9,300	40,700	150,000
Repayment of debt	-135,000
Proceeds from the issuance of debt	150,000
Net (disbursements) proceeds from share-based compensation arrangements	-2,863	19,895	864
Acquisition of treasury stock, at cost	-49,982	-62,056	-69,908
Payment of cash dividends	-21,789	-22,309	-21,285
Excess tax benefits related to share-based compensation	1,214	3,977	648
Payment of debt issuance costs	-823	-1,889	-143
Net cash provided by (used in) financing activities	105,968	-53,060	-63,457
Effect of exchange rate changes on cash and cash equivalents	-982	3	45
Net change in cash and cash equivalents	-1,514	-8,593	19,136
Cash and cash equivalents, beginning of period	22,326	30,919	11,783
Cash and cash equivalents, end of period	$20,812	$22,326	$30,919

Basis_of_Presentation

Basis of Presentation	12 Months Ended
	Dec. 31, 2014
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Presentation	1. Basis of Presentation
	The accompanying Consolidated Financial Statements represent United Stationers Inc. (“USI”) with its wholly owned subsidiary United Stationers Supply Co. (“USSC”), and USSC’s subsidiaries (collectively, “United” or the “Company”). The Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States and include the accounts of USI and its subsidiaries. All intercompany transactions and balances have been eliminated. The Company operates in a single reportable segment as a leading national wholesale distributor of workplace essentials, with net sales of approximately $5.3 billion for the year ended December 31, 2014. The Company stocks over 160,000 items on a national basis from over 1,600 manufacturers. These items include a broad spectrum of technology products, traditional office products, office furniture, janitorial and breakroom supplies, and industrial supplies. The Company sells its products through a national distribution network of 77 distribution centers to its approximately 30,000 reseller customers, who in turn sell directly to end-consumers. The Company’s customers include independent office products dealers; contract stationers; office products superstores; computer products resellers; office furniture dealers; mass merchandisers; mail order companies; sanitary supply, paper and foodservice distributors; drug and grocery store chains; healthcare distributors; e-commerce merchants; oil field, welding supply and industrial/MRO distributors; aftermarket automotive supply distributors and retailers; other independent distributors and end consumers. Many resellers have online capabilities. The Company also operates as an online retailer which sells direct to end consumers.
	Acquisition of O.K.I. Supply Co.
	During the fourth quarter of 2012, USSC completed the acquisition of all of the capital stock of O.K.I. Supply Co. (OKI), a welding, safety and industrial products wholesaler. This acquisition was completed at a purchase price of $90.0 million. The purchase price included a $4.5 million indemnification reserve, which was paid in the fourth quarter of 2014. In total, the purchase price, net of cash acquired, was $79.8 million. The acquisition extends the Company’s position as the leading pure-wholesale industrial distributor in the United States and brings expanded categories and services to customers. The purchase was financed through the Company’s existing debt agreements.
	OKI contributed $20.5 million to the Company’s 2012 net financial sales after its acquisition on November 1, 2012. Had the OKI acquisition been completed as of the beginning of 2012, the Company’s unaudited pro forma net sales for the year ended December 31, 2012 would have been $5.2 billion and unaudited pro forma net income for the year ended December 31, 2012 would have been $112.6 million.
	Acquisition of CPO Commerce, Inc.
	On May 30, 2014, USSC completed the acquisition of CPO, a leading online retailer of brand name power tools and equipment. The acquisition of CPO significantly expanded the Company’s digital resources and capabilities to support resellers as they transition to an increasingly online environment. CPO’s expertise will strength United’s ability to offer features like improved product content, real-time access to inventory and pricing, digital marketing and merchandising, and an enhanced digital platform to our manufacturing partners.
	The purchase price was $37.4 million, including $5.1 million related to the estimated fair value of contingent consideration which is based upon the achievement of certain sales targets during a three-year period immediately following the acquisition date. The final payments related to the contingent consideration will be determined by actual achievement in the earn-out periods and will be between zero and $10 million. Any changes to the estimated fair value after the original purchase accounting is completed will be recorded in “warehousing, marketing and administrative expenses” in the period in which a change occurs. The Company financed the 100% stock acquisition with borrowings under the Company’s available committed bank facilities.
	The Company has developed a preliminary estimate of the fair value of assets acquired and liabilities assumed for purposes of allocating the purchase price. This estimate is subject to change as the valuation activities are completed. The fair value of the assets and liabilities acquired were estimated using various valuation methods including estimated selling price, a market approach, and discounted cash flows using both an income and cost approach.
	At December 31, 2014, the preliminary allocation of the purchase price is as follows (amounts in thousands):
					$	31,825
	Purchase Price, net of cash acquired…………………..
	Preliminary Allocation of Purchase Price:
	Accounts receivable……………………………………	$	(2,658	)
	Inventories……………………………………………..		(13,051	)
	Other current assets…………………………………….		(307	)
	Property, plant and equipment…………………………		(488	)
	Intangible assets………………………………………..		(12,800	)
	Total assets acquired……………………………….					(29,304	)
	Trade accounts payable………………………………..		17,124
	Accrued liabilities……………………………………..		2,130
	Deferred taxes…………………………………………		3,282
	Other long-term liabilities…………………………….		51
	Total liabilities assumed……………………………					22,587
	Goodwill………………………………………………				$	25,108
	The purchased identifiable intangible assets are as follows (amounts in thousands):
		Total			Estimated Life
	Customer relationships	$	5,200		3 years
	Trademark		7,600		15 years
	Total	$	12,800
	Any changes to the preliminary allocation of the purchase price, some of which may be material, will be allocated to residual goodwill.
	The impact of CPO on the Company’s 2014 net financial sales was immaterial. Had the CPO acquisition been completed as of the beginning of 2012, the Company’s unaudited pro forma net sales and net income for the twelve-month periods ending December 31, 2014, 2013, and 2012 would not have been materially impacted.
	Acquisition of MEDCO
	On October 31, 2014, USSC completed the acquisition of all of the capital stock of Liberty Bell Equipment Corp., a United States wholesaler of automotive aftermarket tools and equipment, and its affiliates (collectively, MEDCO) including G2S Equipment de Fabrication et d’Entretien ULC, a Canadian wholesaler. MEDCO advances a key pillar of the Company’s strategy, diversification into higher growth and margin channels and categories. It also brings expanded categories and services to customers.
	The purchase price was $150.0 million, including $4.8 million related to the estimated fair value of contingent consideration which is based upon the achievements of certain sales and EBITDA targets over the next three years as well as $6.0 million reserved as a payable upon completion of an eighteen month indemnification period. The final payments related to the contingent consideration will be determined by actual achievement in the earn-out periods and will be between zero and $10 million. Any changes to the estimated fair value after the original purchase accounting is completed will be recorded in “warehousing, marketing and administrative expenses” in the period in which a change occurs. This acquisition was funded through a combination of cash on hand and cash available under the Company’s committed bank facility.
	The Company has developed a preliminary estimate of the fair value of assets acquired and liabilities assumed for purposes of allocating the purchase price. The estimate is subject to change as the valuation activities are completed. The fair value of the assets and liabilities acquired were estimated using various valuation methods including estimated selling price, a market approach, and discounted cash flows using both an income and cost approach.
	At December 31, 2014, the preliminary allocation of the purchase price is as follows (amounts in thousands):
					$	145,471
	Purchase Price, net of cash acquired…………………..
	Preliminary Allocation of Purchase Price:
	Accounts receivable……………………………………	$	(44,732	)
	Inventories……………………………………………..		(54,656	)
	Other current assets…………………………………….		(1,299	)
	Property, plant and equipment…………………………		(4,408	)
	Deferred Income tax assets…………………………….		(1,615	)
	Other assets……………………………………………..		(442	)
	Intangible assets………………………………………..		(44,070	)
	Total assets acquired……………………………….					(151,222	)
	Trade accounts payable………………………………..		32,383
	Accrued liabilities……………………………………..		3,830
	Other long-term liabilities…………………………….		52
	Total liabilities assumed……………………………					36,265
	Goodwill………………………………………………				$	30,514
	The purchased identifiable intangible assets are as follows (amounts in thousands):
		Total			Estimated Life
	Customer relationships	$	40,030		4-15 years
	Trademarks		4,040		3-15 years
	Total	$	44,070
	Any changes to the preliminary allocation of the purchase price, some of which may be material, will be allocated to residual goodwill.
	MEDCO contributed $36.3 million to the Company’s 2014 net sales after its acquisition on October 31, 2014. Had the MEDCO acquisition been completed as of the beginning of 2012, the Company’s unaudited pro forma net sales for the years ended December 31, 2014, 2013, and 2012 would have been $5.5 billion, $5.3 billion, and $5.3 billion respectively and the Company’s unaudited pro forma net income for the years ended December 31, 2014, 2013, and 2012 would have been $125.0 million, $129.0 million, and $119.2 million, respectively.
	Divestiture of MBS Dev, Inc.
	During the fourth quarter of 2014, the Company completed the sale of MBS Dev, Inc. (“MBS Dev”), a software solutions provider to business products resellers which the Company had acquired in the first quarter of 2010. In conjunction with the sale, United recognized a loss on disposition of MBS Dev.  See Note 4 “Goodwill and Intangible Assets” and Note 15 “Fair Value of Financial Instruments” for further information.
	Investments
	In the fourth quarter of 2013, the Company impaired the remaining investment of $1.2 million in its minority interest in the capital stock of a managed print services and technology solution business that was acquired in 2010. This charge and the Company’s share of the earnings and losses of this investment are included in the Operating Expenses section of the Consolidated Statements of Income.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2. Summary of Significant Accounting Policies
	Principles of Consolidation
	The Consolidated Financial Statements include the accounts of the Company. All significant intercompany accounts and transactions have been eliminated in consolidation. For all acquisitions, account balances and results of operations are included in the Consolidated Financial Statements as of the date acquired.
	Use of Estimates
	The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the Consolidated Financial Statements and accompanying notes. Actual results could differ from these estimates.
	Various assumptions and other factors underlie the determination of significant accounting estimates. The process of determining significant estimates is fact specific and takes into account factors such as historical experience, current and expected economic conditions, product mix, and in some cases, actuarial techniques. The Company periodically reevaluates these significant factors and makes adjustments where facts and circumstances dictate.
	Supplier Allowances
	Supplier allowances (fixed or variable) are common practice in the business products industry and have a significant impact on the Company’s overall gross margin. Receivables related to supplier allowances totaled $124.4 million and $103.2 million as of December 31, 2014 and 2013, respectively. These receivables are included in “Accounts receivable” in the Consolidated Balance Sheets.
	The majority of the Company’s annual supplier allowances and incentives are variable, based solely on the volume and mix of the Company’s product purchases from suppliers. These variable allowances are recorded based on the Company’s annual inventory purchase volumes and product mix and are included in the Company’s Consolidated Financial Statements as a reduction to cost of goods sold, thereby reflecting the net inventory purchase cost. The remaining portion of the Company’s annual supplier allowances and incentives are fixed and are earned based primarily on supplier participation in specific Company advertising and marketing publications. Fixed allowances and incentives are taken to income through cost of goods sold as inventory is sold. Supplier allowances and incentives attributable to unsold inventory are carried as a component of net inventory cost.
	Customer Rebates
	Customer rebates and discounts are common practice in the business products industry and have a significant impact on the Company’s overall sales and gross margin. Customer rebates include volume rebates, sales growth incentives, advertising allowances, participation in promotions and other miscellaneous discount programs. These rebates are paid to customers monthly, quarterly and/or annually. Such rebates are reported in the Consolidated Financial Statements as a reduction of sales. Accrued customer rebates were $63.2 million and $52.6 million as of December 31, 2014 and 2013, respectively, are included as a component of “Accrued liabilities” in the Consolidated Balance Sheets.
	Revenue Recognition
	Revenue is recognized when a service is rendered or when title to the product has transferred to the customer. Management records an estimate for future product returns related to revenue recognized in the current period. This estimate is based on historical product return trends and the gross margin associated with those returns. Management also records customer rebates that are based on annual sales volume to the Company’s customers. Annual rebates earned by customers include growth components, volume hurdle components, and advertising allowances.
	Shipping and handling costs billed to customers are treated as revenues and recognized at the time title to the product has transferred to the customer. Freight costs are included in the Company’s Consolidated Financial Statements as a component of cost of goods sold and are not netted against shipping and handling revenues. Net sales do not include sales tax charged to customers.
	Additional revenue is generated from the sale of software licenses, delivery of subscription services (including the right to use software and software maintenance services), and professional services. Revenue is recognized when persuasive evidence of an arrangement exists, delivery has occurred, the fees are fixed and determinable, and collection is considered probable. If collection is not considered probable, the Company recognizes revenue when the fees are collected. If fees are not fixed and determinable, the Company recognizes revenues when the fees become due from the customer.
	Share-Based Compensation
	At December 31, 2014, the Company had two active share-based employee compensation plans covering key associates and/or non-employee directors of the Company. See Note 3 “Share-Based Compensation” to the Consolidated Financial Statements for more information.
	Accounts Receivable
	In the normal course of business, the Company extends credit to customers. Accounts receivable, as shown in the Consolidated Balance Sheets, include such trade accounts receivable and are net of allowances for doubtful accounts and anticipated discounts. The Company makes judgments as to the collectability of trade accounts receivable based on historical trends and future expectations. Management estimates an allowance for doubtful accounts, which addresses the collectability of trade accounts receivable. This allowance adjusts gross trade accounts receivable downward to its estimated collectible or net realizable value. To determine the allowance for doubtful accounts, management reviews specific customer risks and the Company’s trade accounts receivable aging. Uncollectible trade receivable balances are written off against the allowance for doubtful accounts when it is determined that the trade receivable balance is uncollectible.
	Goodwill and Intangible Assets
	Goodwill is initially recorded based on the premium paid for acquisitions and is subsequently tested for impairment. See Note 4 “Goodwill and Intangible Assets” to the Consolidated Financial Statements.
	Intangible assets are initially recorded at their fair market values determined on quoted market prices in active markets, if available, or recognized valuation models. Intangible assets that have finite useful lives are amortized on a straight-line basis over their useful lives. Intangible assets that have indefinite useful lives are not amortized but are tested at least annually for impairment or whenever events or circumstances indicate impairment may have occurred. See Note 4 “Goodwill and Intangible Assets” to the Consolidated Financial Statements.
	Insured Loss Liability Estimates
	The Company is primarily responsible for retained liabilities related to workers’ compensation, vehicle, and certain employee health benefits. The Company records expense for paid and open claims and an expense for claims incurred but not reported based upon historical trends and certain assumptions about future events. The Company has an annual per-person maximum cap, provided by a third-party insurance company, on certain employee medical benefits. In addition, the Company has a per-occurrence maximum on workers’ compensation and auto claims.
	Leases
	The Company leases real estate and personal property under operating leases. Certain operating leases include incentives from landlords including, landlord “build-out” allowances, rent escalation clauses and rent holidays or periods in which rent is not payable for a certain amount of time. The Company accounts for landlord “build-out” allowances as deferred rent at the time of possession and amortizes this deferred rent on a straight-line basis over the term of the lease.
	The Company also recognizes leasehold improvements associated with the “build-out” allowances and amortizes these improvements over the shorter of (1) the term of the lease or (2) the expected life of the respective improvements. The Company accounts for rent escalation and rent holidays as deferred rent at the time of possession and amortizes this deferred rent on a straight-line basis over the term of the lease. As of December 31, 2014, any capital leases to which the Company is a party are immaterial to the Company’s financial statements.
	Inventories
	Approximately 74% and 76% of total inventory as of December 31, 2014 and 2013, respectively has been valued under the last-in, first-out (“LIFO”) accounting method. LIFO results in a better matching of costs and revenues. The remaining inventory is valued under the first-in, first-out (“FIFO”) accounting method. Inventory valued under the FIFO and LIFO accounting methods is recorded at the lower of cost or market. If the Company had valued its entire inventory under the lower of FIFO cost or market, inventory would have been $118.6 million and $112.4 million higher than reported as of December 31, 2014 and 2013, respectively. The annual change in the LIFO reserve as of December 31, 2014, 2013 and 2012 resulted in a $6.2 million increase, a $4.6 million increase and an $11.7 million increase, respectively, in cost of goods sold.
	The change in the LIFO reserve in 2014 included a LIFO liquidation relating to decrements in four of the Company’s five LIFO pools. These decrements resulted in liquidation of LIFO inventory quantities carried at lower costs in prior years as compared with the cost of current year purchases. This liquidation resulted in LIFO income of $6.0 million which was more than offset by LIFO expense of $12.2 million related to current inflation for an overall net increase in cost of sales of $6.2 million.
	The change in the LIFO reserve in 2013 included a LIFO liquidation relating to a decrement in the Company’s technology LIFO pool. This decrement resulted in liquidation of LIFO inventory quantities carried at lower costs in prior years as compared with the cost of current year purchases. This liquidation resulted in LIFO income of $0.6 million which was more than offset by LIFO expense of $5.2 million related to current inflation for an overall net increase in cost of sales of $4.6 million.
	The change in the LIFO reserve for 2012 included the LIFO liquidation impact relating to decrements in the Company’s office products and technology LIFO pools. These decrements resulted in the liquidation of LIFO inventory quantities carried at lower costs in prior years as compared with the cost of current year purchases. These liquidations resulted in LIFO income of $3.3 million which was more than offset by LIFO expense of $15.0 million related to current inflation for a net increase in cost of sales of $11.7 million.
	The Company also records adjustments to inventory for shrinkage. Inventory that is obsolete, damaged, defective or slow moving is recorded at the lower of cost or market. These adjustments are determined using historical trends and are adjusted, if necessary, as new information becomes available. The Company charges certain warehousing and administrative expenses to inventory each period with $43.3 million and $38.0 million remaining in inventory as of December 31, 2014 and December 31, 2013, respectively.
	Pension Benefits
	Calculating the Company’s obligations and expenses related to its pension requires selection and use of certain actuarial assumptions. As more fully discussed in Note 11 to the Consolidated Financial Statements, these actuarial assumptions include discount rates, expected long-term rates of return on plan assets, mortality rates, and rates of increase in compensation and healthcare costs. To select the appropriate actuarial assumptions, management relies on current market conditions and historical information. Pension expense for 2014 was $3.6 million, compared to $4.5 million and $5.7 million in 2013 and 2012, respectively.
	Cash Equivalents
	An unfunded check balance (payments in-transit) exists for the Company’s primary disbursement accounts. Under the Company’s cash management system, the Company utilizes available borrowings, on an as-needed basis, to fund the clearing of checks as they are presented for payment. As of December 31, 2014, and 2013, outstanding checks totaling $62.1 million and $60.8 million, respectively, were included in “Accounts payable” in the Consolidated Balance Sheets.
	Property, Plant and Equipment
	Property, plant and equipment is recorded at cost. Depreciation and amortization are determined by using the straight-line method over the estimated useful lives of the assets. The estimated useful life assigned to fixtures and equipment is from two to ten years; the estimated useful life assigned to buildings does not exceed forty years; leasehold improvements are amortized over the lesser of their useful lives or the term of the applicable lease. Repair and maintenance costs are charged to expense as incurred.
	Software Capitalization
	The Company capitalizes internal use software development costs in accordance with guidance on accounting for costs of computer software developed or obtained for internal use. Amortization is recorded on a straight-line basis over the estimated useful life of the software, generally not to exceed ten years. Capitalized software is included in “Property, plant and equipment” on the Consolidated Balance Sheets. The total costs are as follows (in thousands):
		As of December 31,
		2014			2013
	Capitalized software development costs	$	91,624		$	83,026
	Accumulated amortization		(65,951	)		(59,257	)
	Net capitalized software development costs	$	25,673		$	23,769
	Derivative Financial Instruments
	The Company’s risk management policies allow for the use of derivative financial instruments to prudently manage foreign currency exchange rate and interest rate exposure. The policies do not allow such derivative financial instruments to be used for speculative purposes. At this time, the Company uses interest rate swaps which are subject to the management, direction and control of its financial officers. Risk management practices, including the use of all derivative financial instruments, are presented to the Board of Directors for approval.
	All derivatives are recognized on the balance sheet date at their fair value. The Company’s outstanding derivative at December 31, 2014 was in a net liability position and was included in “Other Long-Term Liabilities” on the Consolidated Balance Sheet. As of December 31, 2013, the outstanding derivative was in a net asset position and is included in “Other Long-Term Assets” on the Consolidated Balance Sheet.
	The interest rate swaps that the Company has entered into are classified as cash flow hedges in accordance with accounting guidance on derivative instruments and hedging activities as they are hedging a forecasted transaction or the variability of cash flow to be paid by the Company. Changes in the fair value of a derivative that is qualified, designated and highly effective as a cash flow hedge are recorded in other comprehensive income, net of tax, until earnings are affected by the forecasted transaction or the variability of cash flow, and then are reported in current earnings.
	The Company formally documents all relationships between hedging instruments and hedged items, as well as the risk-management objective and strategy for undertaking various hedge transactions. This process includes linking all derivatives designated as cash flow hedges to specific forecasted transactions or variability of cash flow.
	The Company formally assesses, at both the hedge’s inception and on an ongoing basis, whether the derivatives used in hedging transactions are highly effective in offsetting changes in cash flow of hedged items. When it is determined that a derivative is not highly effective as a hedge then hedge accounting is discontinued prospectively in accordance with accounting guidance on derivative instruments and hedging activities. This has not occurred as all cash flow hedges contain no ineffectiveness. See Note 17, “Derivative Financial Instruments”, for further detail.
	Income Taxes
	The Company accounts for income taxes using the liability method in accordance with the accounting guidance for income taxes. The Company estimates actual current tax expense and assesses temporary differences that exist due to differing treatments of items for tax and financial statement purposes. These temporary differences result in the recognition of deferred tax assets and liabilities. A provision has not been made for deferred U.S. income taxes on the undistributed earnings of the Company’s foreign subsidiaries as these earnings have historically been permanently invested except to the extent a liability was recorded in purchase accounting for the undistributed earnings of the foreign subsidiaries of OKI as of the date of the acquisition. It is not practicable to determine the amount of unrecognized deferred tax liability for such unremitted foreign earnings.
	The current and deferred tax balances and income tax expense recognized by the Company are based on management’s interpretation of the tax laws of multiple jurisdictions. Income tax expense also reflects the Company’s best estimates and assumptions regarding, among other things, the level of future taxable income, interpretation of tax laws, and tax planning. Future changes in tax laws, changes in projected levels of taxable income, and tax planning could impact the effective tax rate and current and deferred tax balances recorded by the Company. Management’s estimates as of the date of the Consolidated Financial Statements reflect its best judgment giving consideration to all currently available facts and circumstances. As such, these estimates may require adjustment in the future, as additional facts become known or as circumstances change. Further, in accordance with the accounting guidance on income taxes, the tax effects from uncertain tax positions are recognized in the Consolidated Financial Statements, only if it is more likely than not that the position will be sustained upon examination, based on the technical merits of the position. The Company accounts for interest and penalties related to uncertain tax positions as a component of income tax expense.
	Foreign Currency Translation
	The functional currency for the Company’s foreign operations is the local currency. Assets and liabilities of these operations are translated into U.S. currency at the rates of exchange at the balance sheet date. The resulting translation adjustments are included in other comprehensive income (loss) in the Consolidated Statements of Comprehensive Income, a separate component of stockholders’ equity. Income and expense items are translated at average monthly rates of exchange. Realized gains and losses from foreign currency transactions were not material.
	New Accounting Pronouncements
	In April 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity. This ASU modifies the definition of discontinued operations by limiting discontinued operations reporting to disposals of components of an entity that represent strategic shifts that have (or will have) a major effect on an entity’s operations and financial results. The update also requires additional financial statement disclosures about discontinued operations as well as disposal of an individually significant component of an entity that does not qualify for discontinued operations presentation. The updated guidance is effective prospectively for years beginning on or after December 15, 2014. In the fourth quarter of 2014, the Company elected to early adopt this guidance. This guidance was applied in the analysis of the accounting treatment of our fourth quarter 2014 divestiture of MBS Dev.
	In May 2014, the FASB issued ASU No. 2014-09, Revenue From Contracts With Customers, that outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. The ASU is based on the principle that an entity should recognize revenue to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The ASU also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments and assets recognized from costs incurred to fulfill a contract. Entities have the option of using either a full retrospective or a modified retrospective approach for the adoption of the new standard. This standard is effective for fiscal years beginning after December 15, 2016, including interim periods within that reporting period. The Company is currently evaluating the new guidance to determine the impact it will have on its consolidated financial statements.
	In June 2014, the FASB issued ASU No. 2014-12, Compensation—Stock Compensation (Topic 718): Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved After the Requisite Service Period. The standard requires that a performance target that affects vesting and that could be achieved after the requisite service period be treated as a performance condition, and compensation cost should be recognized in the period in which it becomes probable that the performance target will be achieved. This ASU is effective for fiscal years beginning after December 15, 2015, and for interim periods within those fiscal years. This new standard will not have an effect on the Company’s consolidated financial statements as it is in alignment with the Company’s current accounting policies for equity based compensation.

ShareBased_Compensation

Share-Based Compensation	12 Months Ended
	Dec. 31, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Share-Based Compensation	3. Share-Based Compensation
	Overview
	As of December 31, 2014, the Company has two active equity compensation plans. A description of these plans is as follows:
	Nonemployee Directors’ Deferred Stock Compensation Plan
	Pursuant to the United Stationers Inc. Nonemployee Directors’ Deferred Stock Compensation Plan, non-employee directors may defer receipt of all or a portion of their retainer and meeting fees. Fees deferred are credited quarterly to each participating director in the form of stock units, based on the fair market value of the Company’s common stock on the quarterly deferral date. Each stock unit account generally is distributed and settled in whole shares of the Company’s common stock on a one-for-one basis, with a cash-out of any fractional stock unit interests, after the participant ceases to serve as a Company director. For the years ended December 31, 2014, 2013 and 2012, the Company recorded compensation expense of $0.1 million, $0.1 million, and $0.2 million, respectively. As of December 31, 2014, 2013 and 2012 the accumulated number of stock units outstanding under this plan was 43,082; 56,737; and 62,421; respectively.
	Amended and Restated 2004 Long-Term Incentive Plan (“LTIP”)
	In May 2011, the Company’s shareholders approved the LTIP to, among other things, attract and retain managerial talent, further align the interest of key associates to those of the Company’s stockholders and provide competitive compensation to key associates. Award vehicles include stock options, stock appreciation rights, full value awards, cash incentive awards and performance-based awards. Key associates and non-employee directors of the Company are eligible to become participants in the LTIP, except that non-employee directors may not be granted stock options.
	Accounting For Share-Based Compensation
	The following table summarizes the share-based compensation expense (in thousands):
		Year Ended December 31,
		2014			2013				2012
	Numerator:
	Pre-tax expense	$	8,195		$	10,808			$	8,746
	Tax effect		(3,114	)		(4,108	)			(3,323	)
	After tax expense	$	5,081		$	6,700			$	5,423
	Denominator:
	Denominator for basic shares—Weighted average shares		38,705			39,650				40,337
	Denominator for diluted shares—Adjusted weighted average shares and the effect of dilutive securities		39,130			40,236				40,991
	Net expense per share:
	Net expense per share—basic	$	0.13		$	0.17			$	0.13
	Net expense per share—diluted	$	0.13		$	0.17			$	0.13
	The following tables summarize the intrinsic value of options outstanding, exercisable, and exercised for the applicable periods listed below:
		As of December 31,							Year ended December 31,
		Outstanding			Exercisable				Exercised
	2014	$	6,092		$	4,543			$	537
	2013		9,897			6,262				13,676
	2012		8,420			8,420				2,380
	The following tables summarize the intrinsic value of restricted shares outstanding and vested for the applicable periods listed below:
		As of December 31,			Year ended December 31,
		Outstanding			Vested
	2014	$	45,928		$	10,976
	2013		47,780			12,414
	2012		40,222			8,812
	The aggregate intrinsic values summarized in the tables above are based on the closing sale price per share for the Company’s Common Stock on the last day of trading in each year which was $42.16, $45.89, and $30.99 per share for the years ended December 31, 2014, 2013 and 2012, respectively. Additionally, the aggregate intrinsic value of options exercisable does not include the value of options for which the exercise price exceeds the stock price as of the last day of trading in each year.
	Stock Options
	The fair value of option awards and modifications to option awards is estimated on the date of grant or modification using a Black-Scholes option valuation model that uses various assumptions including the expected stock price volatility, risk-free interest rate, and expected life of the option. The expected term of options granted is derived from the historical forfeiture and exercise behavior and represents the period of time that options granted are expected to be outstanding. The expected volatility of the price of the underlying shares is implied based on historical volatility of the Company’s common stock. The expected dividends were based on the current dividend yield of the Company’s stock as of the date of the grant. The risk-free rate for periods within the contractual life of the option is based on the U.S. Treasury yield curve in effect at the time of grant. The assumptions used are shown in the following table.
		2014			2013
	Weighted average expected term		5.6				5.6
	Expected volatility		39.12	%	40.01 -		40.49	%
	Weighted average volatility		39.12	%			40.48	%
	Weighted average expected dividends		1.24	%			1.46	%
	Risk-free rate		1.75	%	0.76 -		1.62	%
	Stock options granted in 2014 and 2013 vest at the end of 2.25 years and 3 years, respectively, and have a term of 10 years. Previously issued stock options generally vested in annual increments over three years and have a term of 10 years. Compensation costs for all stock options are recognized, net of estimated forfeitures, on a straight-line basis over the vesting period. As of December 31, 2014, there was $2.5 million of unrecognized compensation cost related to stock option awards granted. The cost is expected to be recognized over a weighted-average period of 1.25 years. In 2014, there were 5,538 stock options granted. In 2013, there were 585,189 stock options granted. There were no stock options granted during 2012.
	The following table summarizes the transactions, excluding restricted stock, under the Company’s equity compensation plans for the last three years:
					Weighted							Weighted					Weighted
					Average							Average					Average
					Exercise							Exercise					Exercise
		2014			Price				2013			Price		2012			Price
	Options outstanding—January 1		812,160		$	33.7				1,371,850		$	24.86		1,715,380		$	24.62
	Granted		5,538			45.89				585,189			38.71		-			-
	Exercised		(32,610	)		24.43				(1,065,920	)		24.69		(217,634	)		18.69
	Cancelled		(57,710	)		38.74				(78,959	)		38.69		(125,896	)		32.35
	Options outstanding—December 31		727,378		$	33.81				812,160		$	33.7		1,371,850		$	24.86
	Number of options exercisable		273,320		$	25.54				305,930		$	25.42		1,371,850		$	24.86
	The following table summarizes outstanding and exercisable options granted under the Company’s equity compensation plans as of December 31, 2014:
					Remaining
					Contractual
	Exercise Prices	Outstanding			Life (Years)				Exercisable
	20.00 - 25.00		178,382			1.4				178,382
	25.01 - 30.00		92,692			2.7				92,692
	30.01 - 35.00		2,246			2.4				2,246
	35.01 - 40.00		448,520			8.3				-
	40.01 - 50.00		5,538			9				-
	Total		727,378			5.9				273,320
Restricted Stock and Restricted Stock Units
The Company granted 253,042 shares of restricted stock and 176,717 restricted stock units (“RSUs”) during 2014. During 2013, the Company granted 181,916 shares of restricted stock and 166,348 RSUs. During 2012, the Company granted 461,512 shares of restricted stock and 245,737 RSUs. The restricted stock granted in each period generally vests in three equal annual installments on the anniversaries of the date of the grant. The majority of the RSUs granted in 2014, 2013, and 2012 vest in three annual installments based on the terms of the agreements, to the extent earned based on the Company’s cumulative net income or economic profit performance against target economic profit goals. The performance-based RSUs granted in 2014 and 2013 have a minimum and maximum payout of zero to 200%. The performance-based RSUs granted in 2012 have a minimum and maximum payout of zero to 150%. Included in the 2014, 2013, and 2012 grants were 271,594, 194,517, and 426,064 shares of restricted stock and RSUs granted to employees who were not executive officers, as of December 31, 2014, 2013 and 2012, respectively. In addition, there were 20,664, 23,898, and 41,051 shares of restricted stock and RSUs granted to non-employee directors during the years ended December 31, 2014, 2013 and 2012, respectively. For the years ended December 31, 2014, 2013 and 2012, respectively, there were also 137,501, 129,849, and 240,134 shares of restricted stock and RSUs granted to executive officers. The restricted stock granted to executive officers vests with respect to each officer in annual increments over three years provided that the following conditions are satisfied: (1) the officer is still employed as of the anniversary date of the grant; and (2) the Company’s cumulative diluted earnings per share for the four calendar quarters immediately preceding the vesting date exceed $0.50 per diluted share as defined in the officers’ restricted stock agreement. As of December 31, 2014, there was $12.9 million of total unrecognized compensation cost related to non-vested restricted stock and RSUs granted. The cost is expected to be recognized over a weighted-average period of 2.1 years. The following table summarizes restricted stock and RSU transactions for the last three years.
				Weighted							Weighted					Weighted
				Average							Average					Average
				Grant Date							Grant Date					Grant Date
Restricted Stock and RSUs	2014			Fair Value				2013			Fair Value		2012			Fair Value
Nonvested—January 1		1,041,189		$	31.24				1,297,906		$	28.61		1,002,125		$	26.42
Granted		429,759			40.52				348,264			38.28		707,249			27.84
Vested		(237,739	)		41.59				(323,159	)		37.02		(324,345	)		22
Cancelled		(143,835	)		34.04				(281,822	)		30.04		(87,123	)		28.16
Nonvested—December 31		1,089,374		$	31.23				1,041,189		$	31.24		1,297,906		$	28.61

Goodwill_and_Intangible_Assets

Goodwill and Intangible Assets	12 Months Ended
	Dec. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	4. Goodwill and Intangible Assets
	Goodwill is tested for impairment at the reporting unit level on an annual basis as of October 1 as well as between annual tests if an event occurs or circumstances change that would more likely than not reduce the fair value of the reporting unit below its carrying value. Based on the test completed in 2014, the Company concluded that the fair value of each of the reporting units, excluding MBS Dev, was in excess of the carrying value. The Company makes a qualitative evaluation about the likelihood of goodwill impairment to determine whether it should calculate the fair value of a reporting unit. The Company applied this qualitative approach to one of its four reporting units. Two of the other four reporting units were evaluated for impairment using the market based and/or the discounted cash flow approach to determine fair value. At the Company’s annual impairment test date of October 1, 2014, the Company concluded for three of the four reporting units that goodwill was not impaired as prescribed by related accounting guidance.
	Prior to the completion of the annual goodwill impairment test for MBS Dev, the Company began negotiating the sale of MBS Dev with third parties and concluded that this change in strategy for MBS Dev was an interim indicator of impairment that necessitated an interim test for goodwill impairment. The Company completed a goodwill impairment test as of the date the assets were classified as held for sale, and used a market approach to determine the fair value of the MBS Dev reporting unit. The fair value of the MBS Dev reporting unit did not exceed its carrying value, requiring the Company to determine the amount of goodwill impairment loss by valuing the entity’s assets and liabilities at fair value and comparing the fair value of the implied goodwill to the carrying value of goodwill. Upon completion of this calculation, the carrying amount of the goodwill exceeded the implied fair value of that goodwill, resulting in a goodwill impairment of $9.0 million. The goodwill impairment was partially offset by the fair value of the consideration received for MBS Dev being in excess of the carrying value, leading to a total loss on disposition of MBS Dev of $8.2 million.  The recognized and unrecognized intangible assets were valued using the cost method and relief from royalty approach using estimates of forecasted future revenues.
	Indefinite lived intangible assets are tested for impairment annually as of October 1 or more frequently if events or changes in circumstances indicate that the assets might be impaired. Based on the testing completed in 2014 and no changes in circumstances in the fourth quarter of 2014, intangible values exceeded their book value. In the fourth quarter of 2012, it was determined that a trade name acquired in a past acquisition was no longer in use and therefore was fully impaired. The Company wrote off the value of this indefinite lived intangible, $0.7 million, in the fourth quarter of 2012 and included this amount within operating expenses in the Consolidated Statement of Income and within depreciation and amortization in the Consolidated Statement of Cash Flows.
	As of December 31, 2014 and 2013, the Company’s Consolidated Balance Sheets reflected $398.0 million and $356.8 million of goodwill, and $112.0 million and $65.5 million in net intangible assets, respectively.
	The changes in the carrying amount of goodwill are noted in the following table (in thousands):
	Goodwill, balance as of December 31,  2013	$	356,811
	Acquisition of CPO		25,108
	Acquisition of MEDCO		30,514
	Impairment of MBS Dev Goodwill		(9,034	)
	MBS Dev divestiture		(4,599	)
	Currency translation adjustment		(758	)
	Goodwill, balance as of December 31, 2014	$	398,042
	Net intangible assets consist primarily of customer lists, trademarks, and non-compete agreements purchased as part of past acquisitions. The Company has no intention to renew or extend the terms of acquired intangible assets and accordingly, did not incur any related costs during 2014 or 2013. Amortization of intangible assets purchased as part of these acquisitions totaled $8.6 million, $7.0 million, and $6.1 million for the years ended December 31, 2014, 2013 and 2012, respectively. Accumulated amortization of intangible assets as of December 31, 2014 and 2013 totaled $45.2 million and $38.8 million, respectively.
	The following table summarizes the intangible assets of the Company by major class of intangible assets and the cost, accumulated amortization, net carrying amount, and weighted average life, if applicable (in thousands):
		December 31, 2014									December 31, 2013
										Weighted								Weighted
										Average								Average
		Gross						Net		Useful	Gross					Net		Useful
		Carrying			Accumulated			Carrying		Life	Carrying		Accumulated			Carrying		Life
		Amount			Amortization			Amount		(years)	Amount		Amortization			Amount		(years)
	Intangible assets subject to amortization
	Customer relationships and other intangibles	$	125,761		$	(41,123	)	$	84,638	16	$	84,470	$	(36,232	)	$	48,238	17
	Non-compete agreements		4,672			(2,364	)		2,308	4		4,700		(1,952	)		2,748	4
	Trademarks		14,428			(1,716	)		12,712	13		2,890		(674	)		2,216	5
	Total	$	144,861		$	(45,203	)	$	99,658		$	92,060	$	(38,858	)	$	53,202
	Intangible assets not subject to amortization
	Trademarks		12,300			-			12,300	n/a		12,300	-				12,300	n/a
	Total	$	157,161		$	(45,203	)	$	111,958		$	104,360	$	(38,858	)	$	65,502
	The following table summarizes the amortization expense expected to be incurred over the next five years on intangible assets (in thousands):
	Year	Amounts
	2015	$	13,943
	2016		13,360
	2017		11,296
	2018		7,521
	2019		5,749
	The Company’s industry is changing rapidly and is being shaped by digitalization of work and office, the blurring of its traditional channels, a massive marketing shift to online away from brick and mortar stores, and the convergence of Business-to-Business and Business-to-Consumer.  As a result, the Company is executing actions to reposition itself for success and to continue to give its customers what they need to succeed.  A key action in the repositioning was the approval of a rebranding plan in February 2015. This rebranding plan will be presented for stockholder approval in the proxy statement for the 2015 annual meeting of stockholders. At December 31, 2014, the Company held approximately $12.0 million in intangible assets related to brand names; the Company expects to substantially reduce its use of these brand names as a result of the rebranding.  Accordingly, the Company anticipates in the first quarter of 2015 that certain indefinite lived intangible assets will become definite lived and there will be a reduction to the useful lives of certain other intangible assets.  The Company anticipates recording a non-cash impairment charge during the first quarter of 2015 of approximately $10.0 million and an impact of $12.0 million for the full year 2015 related to impairment and amortization of these intangibles.
	The Company will also continue to exit non-strategic channels and categories during 2015 to further align with its strategies.  In February 2015, the Company approved a plan to sell a subsidiary in Mexico. The Company will actively market the entity as an asset sale and plans to dispose of the entity by the end of 2015.  In conjunction with the classification as held-for-sale, in accordance with ASC 205, the Company is currently estimating a non-cash loss related to the revaluation of these assets of $12.0 million to $16.0 million in the first quarter of 2015. The Company anticipates additional impacts during 2015 related to transaction expenses and foreign exchange volatility. As of December 31, 2014, the Company had $9.4 million recognized in Accumulated Other Comprehensive Income related to the subsidiary’s deferred foreign exchange loss.
	As of December 31, 2014, the carrying amounts of the Mexican subsidiary by major classes of assets and liabilities included in the Consolidated Balance Sheet are as follows (in thousands):
		Amount
	ASSETS
	Current assets:
	Cash and cash equivalents	$	1,288
	Accounts receivable, less allowance for doubtful accounts		9,355
	Inventories		14,757
	Other current assets		261
	Total current assets		25,661
	Property, plant and equipment, at cost
	Fixtures and equipment		589
	Capitalized software costs		109
	Total property, plant and equipment		698
	Less: accumulated depreciation and amortization		576
	Net property, plant equipment		122
	Goodwill		4,621
	Other assets		658
	Total assets	$	31,062
	LIABILITIES
	Current liabilities:
	Accounts payable		5,242
	Accrued liabilities		1,651
	Total current liabilities		6,893
	Other long-term liabilities		7
	Total liabilities	$	6,900

Severance_and_Restructuring_Ch

Severance and Restructuring Charges	12 Months Ended
	Dec. 31, 2014
Restructuring And Related Activities [Abstract]
Severance and Restructuring Charges	5. Severance and Restructuring Charges
	Commencing in the first quarter of 2015 and continuing through the first quarter of 2016, the Company plans to implement a workforce reduction and certain facility closures. The Company is currently estimating the impact of these activities to be approximately $7.0 million in the first quarter of 2015 and an additional $2.0 million in the remainder of 2015 for a total 2015 expense of approximately $9.0 million.
	During the first quarter of 2013, the Company recorded a $14.4 million pre-tax charge related to a workforce reduction and facility closures. These actions were substantially completed in 2013. The pre-tax charge is comprised of certain OKI facility closure expenses of $1.2 million and severance and workforce reduction-related expenses of $13.2 million which were included in operating expenses. Cash outflows for these actions occurred primarily during 2013 and 2014 and will continue into 2015. Cash outlays associated with these charges were $3.9 million and $8.6 million during 2014 and 2013, respectively. During 2014 and 2013, the Company reversed a portion of these charges totaling $0.3 million and $1.4 million, respectively. As of December 31, 2014 and 2013, the Company had accrued liabilities for these actions of $0.2 million and $4.4 million, respectively.
	During the first quarter of 2012, the Company approved a distribution network optimization and cost reduction program. This program was substantially completed in the first quarter of 2012 and the Company recorded a $6.2 million pre-tax charge in that period in connection with these actions. The pre-tax charge is comprised of facility closure expenses of $2.6 million and severance and related expense of $3.6 million which were included in operating expenses. Cash outlays associated with facility closures and severance in 2014 were zero and $0.2 million, respectively. Cash outlays associated with facility closures and severance in 2013 were $0.6 million and $1.1 million, respectively. Cash outlays associated with facility closures and severance in 2012 were $2.1 million and $1.9 million, respectively. During 2012, the Company reversed a portion of these severance charges totaling $0.3 million. As of December 31, 2014 and 2013, the Company had accrued liabilities for these actions of zero and $0.2 million, respectively.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Loss	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Accumulated Other Comprehensive Loss	6. Accumulated Other Comprehensive Loss
	The change in Accumulated Other Comprehensive Income (Loss) (“AOCI”) by component, net of tax, for the year ended December 31, 2014 is as follows:
	(amounts in thousands)	Foreign Currency Translation			Cash Flow Hedges			Defined Benefit Pension Plans			Total
	AOCI, balance as of December 31, 2013	$	(6,661	)	$	871		$	(34,098	)	$	(39,888	)
	Other comprehensive (loss) income before reclassifications		(5,262	)		(1,063	)		(19,400	)		(25,725	)
	Amounts reclassified from AOCI		-			466			2,356			2,822
	Net other comprehensive (loss) income		(5,262	)		(597	)		(17,044	)		(22,903	)
	AOCI, balance as of December 31, 2014	$	(11,923	)	$	274		$	(51,142	)	$	(62,791	)
	The following table details the amounts reclassified out of AOCI into the income statement during the twelve-month period ending December 31, 2014 respectively:
		Amount Reclassified From AOCI
		For the Twelve
		Months Ended
		December 31,			Affected Line Item In The Statement
	Details About AOCI Components	2014			Where Net Income is Presented
	Gain on interest rate swap cash flow hedges, before tax	$	751		Interest expense, net
			(285	)	Tax provision
		$	466		Net of tax
	Amortization of defined benefit pension plan items:
	Prior service cost and unrecognized loss	$	3,856		Warehousing, marketing and administrative expenses
			(1,500	)	Tax provision
			2,356		Net of tax
	Total reclassifications for the period	$	2,822		Net of tax

Earnings_Per_Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Earnings Per Share	7. Earnings Per Share
	Basic earnings per share (“EPS”) is computed by dividing net income by the weighted-average number of common shares outstanding during the period. Diluted EPS reflects the potential dilution that could occur if dilutive securities were exercised into common stock. Stock options, restricted stock and deferred stock units are considered dilutive securities. Stock options to purchase 0.5 million, 0.5 million, and 0.5 million shares of common stock were outstanding at December 31, 2014, 2013, and 2012, respectively, but were not included in the computation of diluted earnings per share because the options’ exercise prices were greater than the average market price of the common shares and, therefore, the effect would be antidilutive. The following table sets forth the computation of basic and diluted earnings per share (in thousands, except per share data):
		Years Ended December 31,
		2014		2013		2012
	Numerator:
	Net income	$	119,198	$	123,170	$	111,830
	Denominator:
	Denominator for basic earnings per share -
	weighted average shares		38,705		39,650		40,337
	Effect of dilutive securities:
	Employee stock options and restricted units		425		586		654
	Denominator for diluted earnings per share -
	Adjusted weighted average shares and the effect of dilutive
	securities		39,130		40,236		40,991
	Net income per share:
	Net income per share - basic	$	3.08	$	3.11	$	2.77
	Net income per share - diluted	$	3.05	$	3.06	$	2.73
	Common Stock Repurchases
	As of December 31, 2014 the Company had $42.4 million remaining on its current Board authorization to repurchase USI common stock. In February 2015, the Board of Directors authorized the Company to purchase an additional $100 million of common stock. In 2014 and 2013, the Company repurchased 1,255,705 and 1,684,365 shares of USI’s common stock at an aggregate cost of $50.6 million and $62.1 million, respectively. Depending on market and business conditions and other factors, the Company may continue or suspend purchasing its common stock at any time without notice. Acquired shares are included in the issued shares of the Company and treasury stock, but are not included in average shares outstanding when calculating earnings per share data. During 2014, 2013 and 2012, the Company reissued 250,747, 1,086,502, and 619,664 shares, respectively, of treasury stock to fulfill its obligations under its equity incentive plans.

Segment_Information

Segment Information	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Segment Information	8. Segment Information
	Management defines operating segments as individual operations that the Chief Operating Decision Maker (“CODM”) (in the Company’s case, the Chief Executive Officer) reviews for the purpose of assessing performance and making operating decisions. When evaluating operating segments, management considers whether:
	·	The component engages in business activities from which it may earn revenues and incur expenses;
	·	The operating results of the component are regularly reviewed by the enterprise’s CODM;
	·	Discrete financial information is available about the component; and
	·	Other factors are present, such as management structure, presentation of information to the Board of Directors and the nature of the business activity of each component.
	Based on the factors referenced above, management has determined that the Company has five operating segments, Supply/Lagasse, ORS Nasco, CPO, Automotive (comprised of the Company’s newly acquired entity, MEDCO) and MBS Dev. Supply/Lagasse also includes operations in Mexico conducted through a USSC subsidiary, Azerty de Mexico, which has been consolidated into the operating segment. ORS Nasco includes operations in Canada and Dubai, UAE.  The Automotive operating segment includes operations in Canada.  For the years ended December 31, 2014, 2013 and 2012, the Company’s net sales from its foreign operations totaled $151.3 million, $138.2 million and $112.5 million, respectively. As of December 31, 2014, 2013, and 2012, long-lived assets of the Company’s foreign operations totaled $42.5 million, $13.8 million, and $13.1 million, respectively.
	Management has also concluded that three of the Company’s operating segments (Supply/Lagasse, ORS Nasco, and Automotive) meet all of the aggregation criteria required by the accounting guidance. Such determination is based on company-wide similarities in (1) the nature of products and/or services provided, (2) customers served, (3) production processes and/or distribution methods used, (4) economic characteristics including margins and earnings before interest and taxes, and (5) regulatory environment. This aggregate presentation reflects management’s approach to assessing performance and allocating resources. MBS Dev and CPO do not meet the materiality thresholds for reporting individual segments and have therefore been combined with the other operating segments.
	The Company’s product offerings may be divided into the following primary categories: (i) traditional office products, which include writing instruments, paper products, organizers and calendars and various office accessories; (ii) technology products such as computer supplies and peripherals; (iii) office furniture, such as desks, filing and storage solutions, seating and systems furniture, along with a variety of products for niche markets such as education government, healthcare and professional services; (iv) janitorial and breakroom supplies, which includes janitorial and breakroom supplies, foodservice consumables, safety and security items, and paper and packaging supplies; and (v) industrial supplies which includes hand and power tools, safety and security supplies, janitorial equipment and supplies, welding products, and automotive aftermarket tools and equipment. In 2014, the Company’s largest supplier was Hewlett-Packard Company which represented approximately 16% of its total purchases. No other supplier accounted for more than 10% of the Company’s total purchases.
	The Company’s customers include independent office products dealers and contract stationers, office products mega-dealers, office products superstores, computer products resellers, office furniture dealers, mass merchandisers, mail order companies, sanitary supply distributors, drug and grocery store chains, e-commerce dealers, other independent distributors and end consumers. The Company had one customer, W.B. Mason Co., Inc., which constituted approximately 12% of its 2014 consolidated net sales. No other single customer accounted for more than 10% of the 2014 consolidated net sales. The following table shows net sales by product category for 2014, 2013 and 2012 (in thousands):
		Years Ended December 31
		2014 (1)		2013 (1)		2012 (1)
	Janitorial and breakroom supplies	$	1,448,528	$	1,336,182	$	1,281,806
	Technology products		1,437,721		1,462,756		1,558,568
	Traditional office products		1,331,797		1,314,456		1,373,399
	Industrial supplies		638,752		517,810		409,266
	Office furniture		309,003		311,403		323,390
	Freight revenue		121,933		105,567		99,319
	Other		39,471		37,119		34,358
	Total net sales	$	5,327,205	$	5,085,293	$	5,080,106
	-1	Certain prior period amounts have been reclassified to conform to the current presentation. Such reclassifications include changes between several product categories due to several specific products being reclassified to different categories. These changes did not impact the Consolidated Statements of Income.

Debt

Debt	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Debt	9. Debt
	USI is a holding company and, as a result, its primary sources of funds are cash generated from operating activities of its direct operating subsidiary, USSC, and from borrowings by USSC. The 2013 Credit Agreement, the 2013 Note Purchase Agreement, the 2013 Credit Agreement, the 2007 Note Purchase Agreement, and the Receivables Securitization Program (each of which are defined below) contain restrictions on the use of cash transferred from USSC to USI.
	Debt consisted of the following amounts (in millions):
		As of		As of
		December 31, 2014		December 31, 2013
	2013 Credit Agreement	$	363	$	206.8
	2013 Note Purchase Agreement		150		-
	2007 Note Purchase Agreement		-		135
	Receivables Securitization Program		200		190.7
	OKI Mortgage & Capital Lease		0.9		1.2
	Total	$	713.9	$	533.7
	As of December 31, 2014, 79.0% of the Company’s outstanding debt, excluding capital leases, was priced at variable interest rates based primarily on the applicable bank prime rate or London InterBank Offered Rate (“LIBOR”). As of December 31, 2014, the overall weighted average effective borrowing rate, excluding the impact of commitment fees, of the Company’s debt was 1.9%. At December 31, 2014, 58.0% of the Company’s debt was unhedged and a 50 basis point movement in interest rates would result in a $2.1 million change in annualized interest expense, on a pre-tax basis, and upon cash flows from operations.
	Receivables Securitization Program
	The Company’s accounts receivable securitization program (“Receivables Securitization Program” or the “Program”) provides maximum financing of up to $200 million. The parties to the program are USI, USSC, United Stationers Receivables, LLC (“USR”), and United Stationers Financial Services (“USFS”) and PNC Bank, National Association and the Bank of Tokyo – Mitsubishi UFJ, Ltd New York Branch (the “Investors”). The Program is governed by the following agreements:
	·	The Amended and Restated Transfer and Administration Agreement among USSC, USFS, USR, and the Investors;
	·	The Receivables Sale Agreement between USSC and USFS;
	·	The Receivables Purchase Agreement between USFS and USR; and
	·	The Performance Guaranty executed by USI in favor of USR.
	Pursuant to the Receivables Sale Agreement, USSC sells to USFS, on an on-going basis, all the customer accounts receivable and related rights originated by USSC. Pursuant to the Receivables Purchase Agreement, USFS sells to USR, on an on-going basis, all the accounts receivable and related rights purchased from USSC. Pursuant to the Amended and Restated Transfer and Administration Agreement, USR then sells the receivables and related rights to the Investors. The Program provides for maximum funding available of the lesser of $200 million or the total amount of eligible receivables less excess concentrations and applicable reserves. USFS retains servicing responsibility over the receivables. USR is a wholly-owned, bankruptcy remote special purpose subsidiary of USFS. The assets of USR are not available to satisfy the creditors of any other person, including USFS, USSC or USI, until all amounts outstanding under the Program are repaid and the Program has been terminated.
	The receivables sold to the Investors remain on USI’s Consolidated Balance Sheets, and amounts advanced to USR by the Investor or any successor Investors are recorded as debt on USI’s Consolidated Balance Sheets. The cost of such debt is recorded as interest expense on USI’s Consolidated Statements of Income. As of December 31, 2014 and December 31, 2013, $360.3 million and $355.4 million, respectively, of receivables had been sold to the Investors. As of December 31, 2014, USR had $200.0 million outstanding under the Program. As of December 31, 2013, USR had $190.7 million outstanding under the Program.
	Credit Agreement and Other Debt
	On October 15, 2007, USI and USSC entered into a Master Note Purchase Agreement (the “2007 Note Purchase Agreement”) with several purchasers. Pursuant to the 2007 Note Purchase Agreement, USSC issued and sold $135 million of floating rate senior secured notes due October 15, 2014 at par in a private placement (the “Series 2007-A Notes”). Interest on the Series 2007-A Notes was payable quarterly in arrears at a rate per annum equal to three-month LIBOR plus 1.30%, beginning January 15, 2008. The parties to the 2007 Note Purchase Agreement have satisfied their obligations under that agreement. The Company will not issue any new debt under the 2007 Note Purchase Agreement.
	On November 25, 2013, USI and USSC, entered into a Note Purchase Agreement (the “2013 Note Purchase Agreement”) with the note purchasers identified therein (collectively, the “Note Purchasers”). Pursuant to the 2013 Note Purchase Agreement, USSC issued and the Note Purchasers purchased an aggregate of $150 million of senior secured notes due January 15, 2021 (the “2014 Notes”). The issuance of the 2014 Notes occurred on January 15, 2014. USSC used the proceeds from the sale of the 2014 Notes to repay the Series 2007-A Notes and to reduce borrowings under the 2013 Credit Agreement, which is described below. Interest on the 2014 Notes is payable semi-annually at a rate per annum equal to 3.75%. At the time USSC priced the 2014 Notes, USSC terminated the June 2013 Swap Transaction (as described in Note 17 “Derivative Financial Instruments”). After giving effect to the impact of terminating the June 2013 Swap Transaction, the effective per annum interest rate on the 2014 Notes is 3.66%. The full principal amount of the 2014 Notes matures on January 15, 2021. If USSC elects to prepay some or all of the 2014 Notes prior to January 15, 2021, USSC will be obligated to pay a Make-Whole Amount calculated as set forth in the Agreement.
	On July 8, 2013, the Company and USSC entered into a Fourth Amended and Restated Five-Year Revolving Credit Agreement (the “2013 Credit Agreement”) with JPMorgan Chase Bank, National Association, as Agent, and the lenders identified therein. The 2013 Credit Agreement extended the maturity date of the loan agreement to July 6, 2018.
	The 2013 Credit Agreement provides for a revolving credit facility with an aggregate committed principal amount of $700 million. The 2013 Credit Agreement also provides for the issuance of letters of credit. The Company had outstanding letters of credit of $11.1 million under the 2013 Credit Agreement as of December 31, 2014 and 2013. Subject to the terms and conditions of the 2013 Credit Agreement, USSC may seek additional commitments to increase the aggregate committed principal amount to a total amount of $1.05 billion.
	Borrowings under the 2013 Credit Agreement bear interest at LIBOR for specified interest periods or at the Alternate Base Rate (as defined in the 2013 Credit Agreement), plus, in each case, a margin determined based on the Company’s debt to EBITDA ratio calculated as provided in Section 6.20 of the 2013 Credit Agreement (the “Leverage Ratio”). Depending on the Company’s Leverage Ratio, the margin on LIBOR-based loans ranges from 1.00% to 2.00% and on Alternate Base Rate loans ranges from 0.00% to 1.00%. As of December 31, 2014, the applicable margin for LIBOR-based loans was 1.25% and for Alternate Base Rate loans was 0.25%. In addition, USSC is required to pay the lenders a fee on the unutilized portion of the commitments under the 2013 Credit Agreement at a rate per annum between 0.15% and 0.35%, depending on the Company’s Leverage Ratio.
	Subject to the terms and conditions of the 2013 Credit Agreement, USSC is permitted to incur up to $300 million of indebtedness in addition to borrowings under the 2013 Credit Agreement plus up to $200 million under the Company’s Receivables Securitization Program and up to $135 million in replacement or refinancing of the 2013 Note Purchase Agreement.
	USSC has entered into several interest rate swap transactions to mitigate its floating rate risk on a portion of its total long-term debt. See Note 17, “Derivative Financial Instruments”, for further details on these swap transactions and their accounting treatment.
	Obligations of USSC under the 2013 Credit Agreement and the 2014 Notes are guaranteed by USI and certain of USSC’s domestic subsidiaries. USSC’s obligations under these agreements and the guarantors’ obligations under the guaranty are secured by liens on substantially all Company assets other than real property and certain accounts receivable already collateralized as part of the Receivables Securitization Program.
	The 2013 Credit Agreement, the 2014 Notes and the Amended and Restated Transfer and Administration Agreement prohibit the Company from exceeding a Leverage Ratio of 3.50 to 1.00 (3.75 to 1.00 or 4.00 to 1.00 for the first four fiscal quarters following certain acquisitions). The 2013 Credit Agreement and the 2013 Note Purchase Agreement also impose limits on the Company’s ability to repurchase stock and issue dividends when the Leverage Ratio is greater than 3.00 to 1.00.
	The 2013 Credit Agreement, the 2014 Notes, and the Amended and Restated Transfer and Administration Agreement contain additional representations and warranties, covenants and events of default that are customary for these types of agreements. The 2013 Credit Agreement, the 2013 Note Purchase Agreement, and the Transfer and Administration Agreement contain cross-default provisions. As a result, if a termination event occurs under any of those agreements, the lenders under all of the agreements may cease to make additional loans, accelerate any loans then outstanding and/or terminate the agreements to which they are party.
	Debt maturities as of December 31, 2014, were as follows (in millions):
	Year	Amount
	2015	$	0.9
	2016		-
	2017		-
	2018		563
	Thereafter		150
	Total	$	713.9

Leases_Contractual_Obligations

Leases, Contractual Obligations and Contingencies	12 Months Ended
	Dec. 31, 2014
Commitments And Contingencies Disclosure [Abstract]
Leases Contractual Obligations And Contingencies	10. Leases, Contractual Obligations and Contingencies
	The Company has entered into non-cancelable long-term leases for certain property and equipment. Future minimum lease payments under operating leases in effect as of December 31, 2014 having initial or remaining non-cancelable lease terms in excess of one year are as follows (in thousands):
		Operating
	Year	Leases
	2015	$	49,778
	2016		42,854
	2017		33,693
	2018		25,676
	2019		22,178
	Thereafter		29,469
	Total required lease payments		203,648
	Operating lease expense was approximately $45.1 million, $46.3 million, and $48.5 million in 2014, 2013 and 2012, respectively.

Pension_Plans_and_Defined_Cont

Pension Plans and Defined Contribution Plan	12 Months Ended
	Dec. 31, 2014
Compensation And Retirement Disclosure [Abstract]
Pension Plans and Defined Contribution Plan	11. Pension Plans and Defined Contribution Plan
	Pension Plans
	As of December 31, 2014, the Company has pension plans covering approximately 2,600 of its active associates. Non-contributory plans covering non-union associates provide pension benefits that are based on years of credited service and a percentage of annual compensation. Beginning in 2009, benefits were frozen in the plans covering non-union employees. Non-contributory plans covering union members generally provide benefits of stated amounts based on years of service. The Company funds the plans in accordance with all applicable laws and regulations. The Company uses December 31 as its measurement date to determine its pension obligations.
	Change in Projected Benefit Obligation
	The following table sets forth the plans’ changes in Projected Benefit Obligation for the years ended December 31, 2014 and 2013 (in thousands):
			2014				2013
	Benefit obligation at beginning of year		$	183,069			$	196,521
	Service cost—benefit earned during the period			1,069				1,479
	Interest cost on projected benefit obligation			8,960				8,379
	Union plan amendments			1,736				-
	Actuarial (gain) loss			35,054				(16,373	)
	Benefits paid			(5,802	)			(6,937	)
	Benefit obligation at end of year		$	224,086			$	183,069
	The increase in projected benefit obligation during 2014 relates to the use of newly issued mortality assumptions released by the Society of Actuaries (“RP-2014”) and a reduction in the assumed discount rate. The use of RP-2014 increased the projected benefit obligation by $8.6 million. The accumulated benefit obligation for the plan as of December 31, 2014 and 2013 totaled $224.1 million and $183.1 million, respectively.
	Plan Assets and Investment Policies and Strategies
	The following table sets forth the change in the plans’ assets for the years ended December 31, 2014 and 2013 (in thousands):
			2014				2013
	Fair value of plan assets at beginning of year		$	162,250			$	145,563
	Actual return on plan assets			15,323				10,624
	Company contributions			2,000				13,000
	Benefits paid			(5,802	)			(6,937	)
	Fair value of plan assets at end of year		$	173,771			$	162,250
	The Company’s pension plan investment allocations, as a percentage of the fair value of total plan assets, as of December 31, 2014 and 2013, by asset category are as follows:
	Asset Category		2014				2013
	Cash			1.1	%			1.2	%
	Equity securities			29.6	%			29.2	%
	Fixed income			45.4	%			42.5	%
	Real assets			13.6	%			16.6	%
	Hedge funds			10.3	%			10.5	%
	Total			100	%			100	%
	The investment policies and strategies for the Company’s pension plan assets are established with the goals of generating above-average investment returns over time, while containing risks within acceptable levels and providing adequate liquidity for the payment of plan obligations. The Company recognizes that there typically are tradeoffs among these objectives, and strives to minimize risk associated with a given expected return.
	The Company’s defined benefit plan assets are measured at fair value on a recurring basis and are invested primarily in a diversified mix of fixed income investments and equity securities. The Company establishes target ranges for investment allocation and sets specific allocations. The target allocations for the non-union plan assets are 50.0% fixed income, 26.0% equity securities, 14.0% real assets, and 10.0% hedge funds. The target allocations for the union plan assets are 20.0% fixed income, 50.0% equity securities, 20.0% real assets and 10.0% hedge funds. Equity securities include investments in large cap and small cap corporations located in the U.S. and a mix of both international and emerging market corporations. Fixed Income securities include investment grade bonds and U.S. treasuries. Other types of investments include commodity futures, Real Estate Investment Trusts (REITs) and hedge funds.
	Fair values for equity and fixed income securities are primarily based on valuations for identical instruments in active markets.
	The fair values of the Company’s pension plan assets at December 31, 2014 and 2013 by asset category are as follows:
	Fair Value Measurements at
	December 31, 2014 (in thousands)
									Quoted Prices In				Significant		Significant
									Active Markets for				Observable		Unobservable
									Identical Assets				Inputs		Inputs
	Asset Category				Total				(Level 1)				(Level 2)		(Level 3)
	Cash				$	1,831			$	1,831
	Equity Securities
	U.S. Large Cap		(a)			18,612				18,612
	International Large Value		(c)			16,791				16,791
	Emerging Markets		(d)			9,653				9,653
	U.S. Small Value Fund		(e)			5,274				5,274
	U.S. Small Growth Fund		(f)			1,123				1,123
	Fixed Income
	U.S. Fixed Income		(g)			78,886				78,886
	Real Assets
	Domestic Real Estate		(h)			13,870				13,870
	Commodities		(i)			9,789				9,789
	Hedge Funds
	Hedge Funds		(j)			17,941								17,941
	Total				$	173,770			$	155,829			$	17,941	$	-
	Fair Value Measurements at
	December 31, 2013 (in thousands)
									Quoted Prices In				Significant		Significant
									Active Markets for				Observable		Unobservable
									Identical Assets				Inputs		Inputs
	Asset Category				Total				(Level 1)				(Level 2)		(Level 3)
	Cash				$	1,888			$	1,888
	Equity Securities
	U.S. Large Cap		(a)			17,380				17,380
International Large Core		(b)			7,650				7,650
International Large Value		(c)			7,598				7,598
Emerging Markets		(d)			8,502				8,502
U.S. Small Value Fund		(e)			5,058				5,058
U.S. Small Growth Fund		(f)			1,211				1,211
Fixed Income
U.S. Fixed Income		(g)			69,070				69,070
Real Assets
Domestic Real Estate		(h)			11,638				11,638
Commodities		(i)			15,246				15,246
Hedge Funds
Hedge Funds		(j)			17,009								17,009
Total				$	162,250			$	145,241			$	17,009	$	-
(a)	A separately managed, diversified portfolio consisting of publically traded large cap stocks. The portfolio is predominately comprised of U.S. companies but may also hold international company stock.
(b)	A daily valued mutual fund investment. The fund invests in publically traded companies domiciled outside the U.S. and includes companies located in emerging market countries.
(c) A daily valued open-ended mutual fund. This fund invests in common stocks of companies domiciled in countries outside of the U.S.
(d)	A daily valued mutual fund investment. The fund invests in publically traded companies domiciled in emerging market countries.
(e)	A daily valued mutual fund investment. The fund invests in publically traded, small capitalization companies that are considered value in style. The majority of holdings are domiciled in the U.S. though the fund may hold international stocks.
(f)	A daily valued mutual fund investment. The fund invests in publically traded, small capitalization companies that are considered growth in style. The majority of holdings are domiciled in the U.S. though the fund may hold international stocks.
(g)	A separately managed fixed income portfolio utilized to match the duration of the Plan’s liabilities. This liability driven investment portfolio is comprised of Treasury securities including STRIPS and zero coupon bonds as well as high quality corporate bonds.
(h) A daily valued mutual fund investment. The fund invests in publically traded Real Estate Investment Trusts. This is an index mutual fund that tracks the Morgan Stanley REIT Index. The fund normally invests at least 98% of assets that are included in the Morgan Stanley REIT Index.
(i) A daily valued mutual fund investment. This fund combines a commodities position, typically through swap agreements, with a portfolio of inflation indexed bonds and other fixed income securities. The commodities position is constructed to track the performance of the Dow Jones UBS Commodity Index.
(j)	A separately managed fund of hedge funds. This fund seeks attractive risk-adjusted returns through investments in a well-diversified group of managers that employ a variety of unique investment strategies. It targets low volatility and low correlation to traditional asset classes. This fund may allocate its assets among a select group of non-traditional portfolio managers that invest or trade in a wide range of securities and other instruments, including, but not limited to: equities and fixed income securities, currencies, commodities, futures contracts, options and other derivative instruments.  This fund was sold prior to December 31, 2014 but the transaction did not settle until January 2015.
Plan Funded Status
The following table sets forth the plans’ funded status as of December 31, 2014 and 2013 (in thousands):
		2014				2013
Funded status of the plan		$	(50,316	)		$	(20,820	)
Unrecognized prior service cost			3,166				1,613
Unrecognized net actuarial loss			79,502				53,158
Net amount recognized		$	32,352			$	33,951
Amounts Recognized in Consolidated Balance Sheets
		2014				2013
Accrued benefit liability		$	(50,316	)		$	(20,820	)
Accumulated other comprehensive income			82,668				54,771
Net amount recognized		$	32,352			$	33,951
Components of Net Periodic Benefit Cost
Net periodic pension cost for the years ended December 31, 2014, 2013 and 2012 for pension and supplemental benefit plans includes the following components (in thousands):
	Pension Benefits
		For the Years Ended December 31,
		2014				2013				2012
Service cost - benefit earned during the period		$	1,069			$	1,479			$	962
Interest cost on projected benefit obligation			8,960				8,379				8,417
Expected return on plan assets			(10,286	)			(11,338	)			(10,005	)
Amortization of prior service cost			182				192				176
Amortization of actuarial loss			3,674				5,741				6,194
Net periodic pension cost		$	3,599			$	4,453			$	5,744
The estimated net actuarial loss and prior service cost that will be amortized from accumulated other comprehensive loss into the net periodic benefit cost during 2015 are approximately $5.8 million and $0.3 million, respectively.
Assumptions Used
The following tables summarize the Company’s actuarial assumptions for discount rates, expected long-term rates of return on plan assets, and rates of increase in compensation for the years ended December 31, 2014, 2013 and 2012:
		2014				2013				2012
Pension plan assumptions:
Assumed discount rate, general			4.09%				4.95%				4.30%
Assumed discount rate, union			4.16%				5.10%				4.45%
Expected long-term rate of return on plan assets, general			6.30%				7.30%				7.75%
Expected long-term rate of return on plan assets, union			7.30%				7.75%				7.75%
To select the appropriate actuarial assumptions, management relied on current market conditions, historical information and consultation with and input from the Company’s outside actuaries. The expected long-term rate of return on plan assets assumption is based on historical returns and the future expectation of returns for each asset category, as well as the target asset allocation of the asset portfolio. There was no rate of compensation increase in each of the past three fiscal years.
Contributions
On December 10, 2014 the Company’s Board of Directors approved a $2 million cash contribution to the Company’s Union pension plan which was funded in January 2015. Additional fundings, if any, for 2015 have not yet been determined.
Estimated Future Benefit Payments
The estimated future benefit payments under the Company’s pension plans are as follows (in thousands):
		Amounts
2015		$	6,130
2016			7,376
2017			7,951
2018			8,117
2019			9,165
2020-2024			55,313
Defined Contribution Plan
The Company has a defined contribution plan. Salaried associates and non-union hourly paid associates are eligible to participate after completing six consecutive months of employment. The plan permits associates to have contributions made as 401(k) salary deferrals on their behalf, or as voluntary after-tax contributions, and provides for Company contributions, or contributions matching associates’ salary deferral contributions, at the discretion of the Board of Directors. Company contributions to match associates’ contributions were approximately $5.5 million, $5.3 million and $5.3 million in 2014, 2013 and 2012, respectively.

Preferred_Stock

Preferred Stock	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Preferred Stock	12. Preferred Stock
	USI’s authorized capital shares include 15 million shares of preferred stock. The rights and preferences of preferred stock are established by USI’s Board of Directors upon issuance. As of December 31, 2014 and 2013, USI had no preferred stock outstanding and all 15 million shares are classified as undesignated preferred stock.

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Taxes	13. Income Taxes
	The provision for income taxes consisted of the following (in thousands):
		For the Years Ended December 31,
		2014			2013			2012
	Currently Payable
	Federal	$	73,319		$	70,234		$	65,835
	State		8,333			8,027			6,683
	Total currently payable		81,652			78,261			72,518
	Deferred, net
	Federal		(5,736	)		(3,891	)		(5,790	)
	State		(631	)		(30	)		(923	)
	Total deferred, net		(6,367	)		(3,921	)		(6,713	)
	Provision for income taxes	$	75,285		$	74,340		$	65,805
	The Company’s effective income tax rates for the years ended December 31, 2014, 2013 and 2012 varied from the statutory federal income tax rate as set forth in the following table (in thousands):
		Years Ended December 31,
		2014						2013						2012
		Amount			% of Pre-tax Income			Amount			% of Pre-tax Income			Amount			% of Pre-tax Income
	Tax provision based on the federal statutory rate	$	68,070			35	%	$	69,128			35	%	$	62,172			35	%
	State and local income taxes—net of federal income tax benefit		4,816			2.5	%		5,292			2.6	%		3,464			2	%
	Change in tax reserves and accrual adjustments		(115	)		(0.1	%)		(69	)		0	%		(521	)		(0.4	%)
	Non-deductible and other		2,514			1.3	%		(11	)		0	%		690			0.4	%
	Provision for income taxes	$	75,285			38.7	%	$	74,340			37.6	%	$	65,805			37	%
	The deferred tax assets and liabilities resulted from temporary differences in the recognition of certain items for financial and tax accounting purposes. The sources of these differences and the related tax effects were as follows (in thousands):
		As of December 31,
		2014						2013
		Assets			Liabilities			Assets			Liabilities
	Accrued expenses	$	12,299		$	-		$	14,615		$	-
	Allowance for doubtful accounts		7,452			-			7,815			-
	Depreciation and amortization		-			26,816			-			28,282
	Intangibles arising from acquisitions		-			22,184			-			23,689
	Inventory reserves and adjustments		-			28,092			-			28,783
	Pension and post-retirement		18,797			-			7,319			-
	Interest rate swap		-			211			-			591
	Share-based compensation		5,653			-			5,750			-
	Income tax credits, capital losses, and net operating losses		12,550			-			5,539			-
	Restructuring costs		273			-			1,930			-
	Other		819			-			376			-
	Total Deferred		57,843			77,303			43,344			81,345
	Valuation Allowance		(7,397	)		-			(2,791	)		-
	Net Deferred	$	50,446		$	77,303		$	40,553		$	81,345
	In the Consolidated Balance Sheets, these deferred assets and liabilities were classified on a net basis as current and non-current, based on the classification of the related asset or liability or the expected reversal date of the temporary difference.
	Valuation allowances principally relate to federal capital loss carryovers, state tax credits, and net operating losses.  As of December 31, 2014, the Company has a capital loss carryforward of $10.2 million that expires in 2019.  The Company also has state tax credit carryforwards of $9.1 million that expire by 2019 and state net operating loss carryforwards of $0.9 million that expire by 2033.
	Accounting for Uncertainty in Income Taxes
	At December 31, 2014, the gross unrecognized tax benefits were $3.2 million. At December 31, 2013 and 2012, the Company had $3.1 million in gross unrecognized tax benefits. The following table shows the changes in gross unrecognized tax benefits, for the years ended December 31, 2014, 2013 and 2012 (in thousands):
		2014			2013			2012
	Beginning Balance, January 1	$	3,108		$	3,134		$	3,374
	Additions based on tax positions taken during a prior period		123			169			308
	Reductions based on tax positions taken during a prior period		(11	)		(5	)		(11	)
	Additions based on tax positions taken during the current period		382			389			451
	Reductions related to settlement of tax matters		(70	)		(184	)		(490	)
	Reductions related to lapses of applicable statutes of limitation		(327	)		(395	)		(498	)
	Ending Balance, December 31	$	3,205		$	3,108		$	3,134
	The total amount of unrecognized tax benefits as of December 31, 2014, 2013 and 2012 that, if recognized, would affect the effective tax rate are $2.1 million, $2.0 million, and $2.0 million, respectively.
	The Company recognizes net interest and penalties related to unrecognized tax benefits in income tax expense. The gross amount of interest and penalties reflected in the Consolidated Statements of Income for the years ended December 31, 2014, 2013 and 2012 were zero, zero, and income of $0.1 million, respectively. The Consolidated Balance Sheets at December 31, 2014 and 2013 include $0.6 million accrued for the potential payment of interest and penalties.
	As of December 31, 2014, the Company’s U.S. Federal income tax returns for 2011 and subsequent years remain subject to examination by tax authorities. In addition, the Company’s state income tax returns for the 2007 and subsequent tax years remain subject to examinations by state and local income tax authorities. Although the Company is not currently under examination by the IRS, a number of state and local examinations are currently ongoing. Due to the potential for resolution of ongoing examinations and the expiration of various statutes of limitation, it is reasonably possible that the Company’s gross unrecognized tax benefits balance may change within the next twelve months by a range of zero to $1.0 million.

Supplemental_Cash_Flow_Informa

Supplemental Cash Flow Information	12 Months Ended
	Dec. 31, 2014
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flow Information	14. Supplemental Cash Flow Information
	In addition to the information provided in the Consolidated Statements of Cash Flows, the following are supplemental disclosures of cash flow information for the years ended December 31, 2014, 2013 and 2012 (in thousands):
		Years Ended December 31
		2014		2013		2012
	Cash Paid During the Year For:
	Interest	$	12,822	$	12,385	$	22,563
	Income taxes, net		76,205		79,526		53,053

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	15. Fair Value of Financial Instruments
	The estimated fair value of the Company’s financial instruments approximates their net carrying values. The estimated fair values of the Company’s financial instruments are as follows (in thousands):
		As of  December 31,
		2014				2013
		Carrying Amount		Fair Value		Carrying Amount		Fair Value
	Cash and cash equivalents	$	20,812	$	20,812	$	22,326	$	22,326
	Accounts receivable, net		702,527		702,527		643,379		643,379
	Convertible note receivable		6,775		6,775		-		-
	Non-convertible note receivable		2,800		2,800		-		-
	Accounts payable		485,241		485,241		476,113		476,113
	Debt		713,909		713,909		533,697		533,697
	Long-term interest rate swap liability		253		253		-		-
	Long-term interest rate swap asset		-		-		599		599
	The fair value of the interest rate swaps is estimated based upon the amount that the Company would receive or pay to terminate the agreements as of December 31 of each year. See Note 17, “Derivative Financial Instruments”, for further information.
	The convertible and non-convertible notes disclosed above were part of the consideration received in the sale of MBS Dev in the fourth quarter of 2014.  Both have maturity dates of December 16, 2019. The convertible note is convertible upon the discretion of the Company and can be converted into common units of a privately held company. Both notes are carried at fair market value. See Note 18 “”Fair Value Measurements” for additional information.

Other_Assets_and_Liabilities

Other Assets and Liabilities	12 Months Ended
	Dec. 31, 2014
Regulatory Assets And Liabilities Disclosure [Abstract]
Other Assets and Liabilities	16. Other Assets and Liabilities
	Other assets and liabilities as of December 31, 2014 and 2013 were as follows (in thousands):
		As of  December 31,
		2014		2013
	Other Long-Term Assets, net:
	Investment in deferred compensation	$	4,984	$	4,408
	Long-term prepaid assets		19,055		14,063
	Long-term convertible and non-convertible notes receivable		9,575		-
	Capitalized financing costs		3,141		3,391
	Long-term swap asset		-		599
	Long-term income tax asset		2,881		-
	Other		2,174		3,115
	Total other long-term assets, net	$	41,810	$	25,576
	Other Long-Term Liabilities:
	Accrued pension obligation	$	50,316	$	20,820
	Deferred rent		16,241		18,654
	Deferred directors compensation		5,016		4,412
	Long-term swap liability		253		-
	Long-term income tax liability		3,639		3,482
	Long-term merger expenses		17,229		198
	Long-term workers compensation liability		7,155		6,876
	Other		4,545		5,345
	Total other long-term liabilities	$	104,394	$	59,787

Derivative_Financial_Instrumen

Derivative Financial Instruments

12 Months Ended

Dec. 31, 2014

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments

17. Derivative Financial Instruments

Interest rate movements create a degree of risk to the Company’s operations by affecting the amount of interest payments. Interest rate swap agreements are used to manage the Company’s exposure to interest rate changes. The Company designates its floating-to-fixed interest rate swaps as cash flow hedges of the variability of future cash flows at the inception of the swap contract to support hedge accounting.

USSC has entered into swap transactions to mitigate USSC’s floating rate risk on the noted aggregate notional amount of LIBOR-based interest rate risk noted in the table below. These swap transactions occurred as follows:

·

On November 6, 2007, USSC entered into an interest rate swap transaction (the “November 2007 Swap Transaction”) with U.S. Bank National Association as the counterparty. This swap transaction matured on January 15, 2013.

·

On July 18, 2012, USSC entered into a two-year forward, three-year interest rate swap transaction (the “July 2012 Swap Transaction”) with U.S. Bank National Association as the counterparty. The swap transaction has an effective date of July 18, 2014 and a maturity date of July 18, 2017.

·

On June 11, 2013, USSC entered into a seven-month forward, seven-year interest rate swap transaction (the “June 2013 Swap Transaction”) with J.P. Morgan Chase Bank as the counterparty. The swap transaction has an effective date of January 15, 2014 and a maturity date of January 15, 2021. This swap was terminated in October 2013.

Approximately 42% of the Company’s current outstanding debt had its interest payments designated as the hedged forecasted transactions as of December 31, 2014.

The Company’s outstanding swap transaction is accounted for as cash flow hedge and is recorded at fair value on the statement of financial position as of December 31, 2014 and December 31, 2013. This hedge was as follows (in thousands):

Notional

Fair Value Net

As of December 31, 2014

Amount

Receive

Pay

Maturity Date

Liability (1)

July 2012 Swap Transaction

$

150,000

Floating 1-month LIBOR

1.05%

July 18, 2017

$

253

-1

This interest rate derivative qualifies for hedge accounting and is in a net liability position. Therefore, the fair value of the interest rate derivative is included in the Company’s Consolidated Balance Sheets as a component of “Other Long-Term Liabilities”, with an offsetting component in “Stockholders’ Equity” as part of “Accumulated Other Comprehensive Loss”.

Notional

Fair Value Net

As of December 31, 2013

Amount

Receive

Pay

Maturity Date

Asset (1)

July 2012 Swap Transaction

$

150,000

Floating 1-month LIBOR

1.05%

July 18, 2017

$

599

-1

This interest rate derivative qualifies for hedge accounting and is in a net asset position. Therefore, the fair value of the interest rate derivative included in the Company’s Consolidated Balance Sheets as a component of “Other Long-Term Assets” with an offsetting component in “Stockholders’ Equity” as part of “Accumulated Other Comprehensive Loss”.

Under the terms of the July 2012 Swap Transaction, USSC is required to make monthly fixed rate payments to the counterparty calculated based on the notional amounts noted in the table above at a fixed rate also noted in the table above, while the counterparty will be obligated to make monthly floating rate payments to USSC based on the one-month LIBOR on the same referenced notional amount.

The hedged transaction described above qualifies as a cash flow hedge in accordance with accounting guidance on derivative instruments. This guidance requires companies to recognize all of their derivative instruments as either assets or liabilities in the statement of financial position at fair value. The Company does not offset fair value amounts recognized for interest rate swaps executed with the same counterparty.

In connection with the pricing of the 2013 Note Purchase Agreement, discussed in Note 9 “Debt”, the Company terminated the June 2013 Swap Transaction. The gain of $0.9 million realized by the Company on the termination was recorded as a component of Other Comprehensive Income on the Company’s consolidated balance sheet as of December 31, 2014 and is being reclassified into earnings over the term of the 2014 Notes. During 2014, $0.1M was reclassified into earnings. Within the next 12 months, $0.1M will be recognized in earnings. This swap reduced the exposure to variability in interest rates between the date the Company entered into the hedge and the pricing of the 2014 Notes by the Company.

The July 2012 Swap Transaction effectively converts a portion of the Company’s future floating-rate debt to a fixed-rate basis. This swap transaction reduces the impact of interest rate changes on future interest expense. By using such derivative financial instruments, the Company exposes itself to credit risk and market risk. Credit risk is the risk that the counterparty to the interest rate swap (as noted above) will fail to perform under the terms of the agreement. The Company attempts to minimize the credit risk in these agreements by only entering into transactions with counterparties the Company determines are creditworthy. The market risk is the adverse effect on the value of a derivative financial instrument that results from a change in interest rates.

The Company’s agreement with its derivative counterparty provides that if an event of default occurs on any Company debt of $25 million or more, the counterparty can terminate the swap agreement. If an event of default had occurred and the counterparty had exercised their early termination right under the outstanding swap transaction as of December 31, 2014, the Company would have been obligated to pay the aggregate fair value net liability of $0.3 million plus accrued interest to the counterparty.

The swap transaction that was in effect as of December 31, 2014 and 2013 contained no ineffectiveness; therefore, all gains or losses on that derivative instrument were reported as a component of other comprehensive income (“OCI”) and reclassified into earnings as “interest expense” in the same period or periods during which they affected earnings. The following table depicts the effect of these derivative instruments on the statements of income and comprehensive income for years ended December 31, 2014 and 2013.

Amount of Gain (Loss)

Location of Gain (Loss)

Amount of Gain (Loss)

Recognized in

Reclassified from

Reclassified

OCI on Derivative

Accumulated OCI into

from Accumulated OCI into Income

(Effective Portion)

Income (Effective

(Effective Portion)

Portion)

2014

2013

2014

2013

November 2007 Swap Transaction

$

-

$

(77

)

Interest expense, net

$

-

$

(228

)

July 2012 Swap Transaction

105

864

Interest expense, net

625

-

June 2013 Swap Transaction

-

569

Interest expense, net

-

-

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value Measurements	18. Fair Value Measurements
	The Company measures certain financial assets and liabilities at fair value on a recurring basis, including certain note receivables and interest rate swap liabilities related to interest rate swap derivatives based on the mark-to-market position of the Company’s interest rate swap positions and other observable interest rates (see Note 17, “Derivative Financial Instruments”, for more information on these interest rate swaps).
	FASB accounting guidance on fair value establishes a hierarchy for those instruments measured at fair value which distinguishes between assumptions based on market data (observable inputs) and the Company’s own assumptions (unobservable inputs). The hierarchy consists of three levels:
	·	Level 1—Quoted market prices in active markets for identical assets or liabilities;
	·	Level 2—Inputs other than Level 1 inputs that are either directly or indirectly observable; and
	·	Level 3—Unobservable inputs developed using estimates and assumptions developed by the Company which reflect those that a market participant would use.
	Determining which category an asset or liability falls within the hierarchy requires significant judgment. The Company evaluates its hierarchy disclosures each quarter. The following table summarizes the financial instruments measured at fair value in the accompanying Consolidated Balance Sheets as of December 31, 2014 and 2013 (in thousands):
		Fair Value Measurements as of December 31, 2014
				Quoted Market		Significant Other		Significant
				Prices in Active		Observable		Unobservable
				Markets for		Inputs		Inputs
				Identical Assets  or
				Liabilities
		Total		Level 1		Level 2		Level 3
	Assets
	Convertible note receivable	$	6,775	$	-	$	-	$	6,775
	Non-convertible note receivable		2,800		-		-		2,800
	Liabilities
	Interest rate swap liability		253		-		253		-
	Total	$	9,828	$	-	$	253	$	9,575
		Fair Value Measurements as of December 31, 2013
				Quoted Market		Significant Other		Significant
				Prices in Active		Observable		Unobservable
				Markets for		Inputs		Inputs
				Identical Assets  or
				Liabilities
		Total		Level 1		Level 2		Level 3
	Assets
	Interest rate swap asset	$	599	$	-	$	599	$	-
	The carrying amount of accounts receivable at December 31, 2014 and 2013, including $360.3 million and $355.4 million, respectively, of receivables sold under the Current Receivables Securitization Program, approximates fair value because of the short-term nature of this item.
	The notes above were obtained as part of the consideration received from the sale of MBS Dev in December 2014. Both have maturity dates of December 16, 2019. The convertible note can be converted into common units of a privately held company at the Company’s discretion. Both notes are carried at fair market value, which is revalued quarterly. The non-convertible promissory note was valued using a discounted cash flow analysis with a rate typical for investments in similar-sized companies.  The convertible subordinated promissory note was additionally valued using an option pricing model. This method values the conversion feature by using the price paid per share by the most recent, third-party investor.
	FASB accounting guidance on fair value measurements requires separate disclosure of assets and liabilities measured at fair value on a recurring basis, as noted above, from those measured at fair value on a nonrecurring basis. As of December 31, 2014, no assets or liabilities are measured at fair value on a nonrecurring basis.

Quarterly_Financial_DataUnaudi

Quarterly Financial Data-Unaudited	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Data-Unaudited	19. Quarterly Financial Data—Unaudited
		First Quarter		Second Quarter		Third Quarter		Fourth Quarter		Total(1)
		(dollars in thousands, except per share data)
	Year Ended December 31, 2014:
	Net sales	$	1,254,139	$	1,320,037	$	1,419,947	$	1,333,082	$	5,327,205
	Gross profit		187,083		199,460		211,028		212,930	$	810,501
	Net income(2)		21,857		33,331		38,169		25,841	$	119,198
	Net income per share—basic	$	0.56	$	0.86	$	0.99	$	0.67	$	3.08
	Net income per share—diluted	$	0.55	$	0.85	$	0.98	$	0.67	$	3.05
	Year Ended December 31, 2013:
	Net sales	$	1,250,485	$	1,274,494	$	1,336,676	$	1,223,638	$	5,085,293
	Gross profit		188,525		201,936		203,661		195,456		789,578
	Net income(3)		13,874		34,670		40,501		34,125		123,170
	Net income per share—basic	$	0.35	$	0.87	$	1.03	$	0.86	$	3.11
	Net income per share—diluted	$	0.34	$	0.86	$	1.01	$	0.85	$	3.06
	(1) As a result of changes in the number of common and common equivalent shares during the year, the sum of quarterly earnings per share will not necessarily equal earnings per share for the total year.
	(2) 2014 results were impacted by a loss on disposition of MBS Dev totaling $8.2 million or $0.21 per diluted share in the fourth quarter. This loss was not fully recognizable for tax.
	(3) 2013 results were impacted by the effects of a $13.0 million or $0.20 per diluted share workforce reduction and facility closure charge in the first quarter, and a non-tax deductible $1.2 million or $0.03 per diluted share asset impairment charge in the fourth quarter.

Schedule_II_Valuation_and_Qual

Schedule II Valuation and Qualifying Accounts	12 Months Ended
	Dec. 31, 2014
Valuation And Qualifying Accounts [Abstract]
Schedule II Valuation and Qualifying Accounts	SCHEDULE II
	UNITED STATIONERS INC. AND SUBSIDIARIES VALUATION AND QUALIFYING ACCOUNTS
	YEARS ENDED DECEMBER 31, 2014, 2013 and 2012
	Description (in thousands)	Balance at Beginning of Period		Additions Charged to Costs and Expenses		Deductions(1)			Reclassifications(2)			Balance at End of Period
	Allowance for doubtful accounts(3):
	2014	$	20,608	$	4,898	$	(5,781	)	$	-		$	19,725
	2013		22,716		4,888		(6,504	)		(492	)		20,608
	2012		28,323		5,232		(8,490	)		(2,349	)		22,716
	(1)—net of any recoveries.
	(2)—represents the reclassification of a valuation allowance for customer deductions which also offsets accounts receivable.
	(3)—represents allowance for doubtful accounts related to the retained interest in receivables sold and accounts receivable, net.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation
	The Consolidated Financial Statements include the accounts of the Company. All significant intercompany accounts and transactions have been eliminated in consolidation. For all acquisitions, account balances and results of operations are included in the Consolidated Financial Statements as of the date acquired.
Use of Estimates	Use of Estimates
	The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the Consolidated Financial Statements and accompanying notes. Actual results could differ from these estimates.
	Various assumptions and other factors underlie the determination of significant accounting estimates. The process of determining significant estimates is fact specific and takes into account factors such as historical experience, current and expected economic conditions, product mix, and in some cases, actuarial techniques. The Company periodically reevaluates these significant factors and makes adjustments where facts and circumstances dictate.
Supplier Allowances	Supplier Allowances
	Supplier allowances (fixed or variable) are common practice in the business products industry and have a significant impact on the Company’s overall gross margin. Receivables related to supplier allowances totaled $124.4 million and $103.2 million as of December 31, 2014 and 2013, respectively. These receivables are included in “Accounts receivable” in the Consolidated Balance Sheets.
	The majority of the Company’s annual supplier allowances and incentives are variable, based solely on the volume and mix of the Company’s product purchases from suppliers. These variable allowances are recorded based on the Company’s annual inventory purchase volumes and product mix and are included in the Company’s Consolidated Financial Statements as a reduction to cost of goods sold, thereby reflecting the net inventory purchase cost. The remaining portion of the Company’s annual supplier allowances and incentives are fixed and are earned based primarily on supplier participation in specific Company advertising and marketing publications. Fixed allowances and incentives are taken to income through cost of goods sold as inventory is sold. Supplier allowances and incentives attributable to unsold inventory are carried as a component of net inventory cost.
Customer Rebates	Customer Rebates
	Customer rebates and discounts are common practice in the business products industry and have a significant impact on the Company’s overall sales and gross margin. Customer rebates include volume rebates, sales growth incentives, advertising allowances, participation in promotions and other miscellaneous discount programs. These rebates are paid to customers monthly, quarterly and/or annually. Such rebates are reported in the Consolidated Financial Statements as a reduction of sales. Accrued customer rebates were $63.2 million and $52.6 million as of December 31, 2014 and 2013, respectively, are included as a component of “Accrued liabilities” in the Consolidated Balance Sheets.
Revenue Recognition	Revenue Recognition
	Revenue is recognized when a service is rendered or when title to the product has transferred to the customer. Management records an estimate for future product returns related to revenue recognized in the current period. This estimate is based on historical product return trends and the gross margin associated with those returns. Management also records customer rebates that are based on annual sales volume to the Company’s customers. Annual rebates earned by customers include growth components, volume hurdle components, and advertising allowances.
	Shipping and handling costs billed to customers are treated as revenues and recognized at the time title to the product has transferred to the customer. Freight costs are included in the Company’s Consolidated Financial Statements as a component of cost of goods sold and are not netted against shipping and handling revenues. Net sales do not include sales tax charged to customers.
	Additional revenue is generated from the sale of software licenses, delivery of subscription services (including the right to use software and software maintenance services), and professional services. Revenue is recognized when persuasive evidence of an arrangement exists, delivery has occurred, the fees are fixed and determinable, and collection is considered probable. If collection is not considered probable, the Company recognizes revenue when the fees are collected. If fees are not fixed and determinable, the Company recognizes revenues when the fees become due from the customer.
Share-Based Compensation	Share-Based Compensation
	At December 31, 2014, the Company had two active share-based employee compensation plans covering key associates and/or non-employee directors of the Company. See Note 3 “Share-Based Compensation” to the Consolidated Financial Statements for more information.
Accounts Receivable	Accounts Receivable
	In the normal course of business, the Company extends credit to customers. Accounts receivable, as shown in the Consolidated Balance Sheets, include such trade accounts receivable and are net of allowances for doubtful accounts and anticipated discounts. The Company makes judgments as to the collectability of trade accounts receivable based on historical trends and future expectations. Management estimates an allowance for doubtful accounts, which addresses the collectability of trade accounts receivable. This allowance adjusts gross trade accounts receivable downward to its estimated collectible or net realizable value. To determine the allowance for doubtful accounts, management reviews specific customer risks and the Company’s trade accounts receivable aging. Uncollectible trade receivable balances are written off against the allowance for doubtful accounts when it is determined that the trade receivable balance is uncollectible.
Goodwill and Intangible Assets	Goodwill and Intangible Assets
	Goodwill is initially recorded based on the premium paid for acquisitions and is subsequently tested for impairment. See Note 4 “Goodwill and Intangible Assets” to the Consolidated Financial Statements.
	Intangible assets are initially recorded at their fair market values determined on quoted market prices in active markets, if available, or recognized valuation models. Intangible assets that have finite useful lives are amortized on a straight-line basis over their useful lives. Intangible assets that have indefinite useful lives are not amortized but are tested at least annually for impairment or whenever events or circumstances indicate impairment may have occurred. See Note 4 “Goodwill and Intangible Assets” to the Consolidated Financial Statements.
Insured Loss Liability Estimates	Insured Loss Liability Estimates
	The Company is primarily responsible for retained liabilities related to workers’ compensation, vehicle, and certain employee health benefits. The Company records expense for paid and open claims and an expense for claims incurred but not reported based upon historical trends and certain assumptions about future events. The Company has an annual per-person maximum cap, provided by a third-party insurance company, on certain employee medical benefits. In addition, the Company has a per-occurrence maximum on workers’ compensation and auto claims.
Leases	Leases
	The Company leases real estate and personal property under operating leases. Certain operating leases include incentives from landlords including, landlord “build-out” allowances, rent escalation clauses and rent holidays or periods in which rent is not payable for a certain amount of time. The Company accounts for landlord “build-out” allowances as deferred rent at the time of possession and amortizes this deferred rent on a straight-line basis over the term of the lease.
	The Company also recognizes leasehold improvements associated with the “build-out” allowances and amortizes these improvements over the shorter of (1) the term of the lease or (2) the expected life of the respective improvements. The Company accounts for rent escalation and rent holidays as deferred rent at the time of possession and amortizes this deferred rent on a straight-line basis over the term of the lease. As of December 31, 2014, any capital leases to which the Company is a party are immaterial to the Company’s financial statements.
Inventories	Inventories
	Approximately 74% and 76% of total inventory as of December 31, 2014 and 2013, respectively has been valued under the last-in, first-out (“LIFO”) accounting method. LIFO results in a better matching of costs and revenues. The remaining inventory is valued under the first-in, first-out (“FIFO”) accounting method. Inventory valued under the FIFO and LIFO accounting methods is recorded at the lower of cost or market. If the Company had valued its entire inventory under the lower of FIFO cost or market, inventory would have been $118.6 million and $112.4 million higher than reported as of December 31, 2014 and 2013, respectively. The annual change in the LIFO reserve as of December 31, 2014, 2013 and 2012 resulted in a $6.2 million increase, a $4.6 million increase and an $11.7 million increase, respectively, in cost of goods sold.
	The change in the LIFO reserve in 2014 included a LIFO liquidation relating to decrements in four of the Company’s five LIFO pools. These decrements resulted in liquidation of LIFO inventory quantities carried at lower costs in prior years as compared with the cost of current year purchases. This liquidation resulted in LIFO income of $6.0 million which was more than offset by LIFO expense of $12.2 million related to current inflation for an overall net increase in cost of sales of $6.2 million.
	The change in the LIFO reserve in 2013 included a LIFO liquidation relating to a decrement in the Company’s technology LIFO pool. This decrement resulted in liquidation of LIFO inventory quantities carried at lower costs in prior years as compared with the cost of current year purchases. This liquidation resulted in LIFO income of $0.6 million which was more than offset by LIFO expense of $5.2 million related to current inflation for an overall net increase in cost of sales of $4.6 million.
	The change in the LIFO reserve for 2012 included the LIFO liquidation impact relating to decrements in the Company’s office products and technology LIFO pools. These decrements resulted in the liquidation of LIFO inventory quantities carried at lower costs in prior years as compared with the cost of current year purchases. These liquidations resulted in LIFO income of $3.3 million which was more than offset by LIFO expense of $15.0 million related to current inflation for a net increase in cost of sales of $11.7 million.
	The Company also records adjustments to inventory for shrinkage. Inventory that is obsolete, damaged, defective or slow moving is recorded at the lower of cost or market. These adjustments are determined using historical trends and are adjusted, if necessary, as new information becomes available. The Company charges certain warehousing and administrative expenses to inventory each period with $43.3 million and $38.0 million remaining in inventory as of December 31, 2014 and December 31, 2013, respectively.
Pension Benefits	Pension Benefits
	Calculating the Company’s obligations and expenses related to its pension requires selection and use of certain actuarial assumptions. As more fully discussed in Note 11 to the Consolidated Financial Statements, these actuarial assumptions include discount rates, expected long-term rates of return on plan assets, mortality rates, and rates of increase in compensation and healthcare costs. To select the appropriate actuarial assumptions, management relies on current market conditions and historical information. Pension expense for 2014 was $3.6 million, compared to $4.5 million and $5.7 million in 2013 and 2012, respectively.
Cash Equivalents	Cash Equivalents
	An unfunded check balance (payments in-transit) exists for the Company’s primary disbursement accounts. Under the Company’s cash management system, the Company utilizes available borrowings, on an as-needed basis, to fund the clearing of checks as they are presented for payment. As of December 31, 2014, and 2013, outstanding checks totaling $62.1 million and $60.8 million, respectively, were included in “Accounts payable” in the Consolidated Balance Sheets.
Property, Plant and Equipment	Property, Plant and Equipment
	Property, plant and equipment is recorded at cost. Depreciation and amortization are determined by using the straight-line method over the estimated useful lives of the assets. The estimated useful life assigned to fixtures and equipment is from two to ten years; the estimated useful life assigned to buildings does not exceed forty years; leasehold improvements are amortized over the lesser of their useful lives or the term of the applicable lease. Repair and maintenance costs are charged to expense as incurred.
Software Capitalization	Software Capitalization
	The Company capitalizes internal use software development costs in accordance with guidance on accounting for costs of computer software developed or obtained for internal use. Amortization is recorded on a straight-line basis over the estimated useful life of the software, generally not to exceed ten years. Capitalized software is included in “Property, plant and equipment” on the Consolidated Balance Sheets. The total costs are as follows (in thousands):
		As of December 31,
		2014			2013
	Capitalized software development costs	$	91,624		$	83,026
	Accumulated amortization		(65,951	)		(59,257	)
	Net capitalized software development costs	$	25,673		$	23,769
Derivative Financial Instruments	Derivative Financial Instruments
	The Company’s risk management policies allow for the use of derivative financial instruments to prudently manage foreign currency exchange rate and interest rate exposure. The policies do not allow such derivative financial instruments to be used for speculative purposes. At this time, the Company uses interest rate swaps which are subject to the management, direction and control of its financial officers. Risk management practices, including the use of all derivative financial instruments, are presented to the Board of Directors for approval.
	All derivatives are recognized on the balance sheet date at their fair value. The Company’s outstanding derivative at December 31, 2014 was in a net liability position and was included in “Other Long-Term Liabilities” on the Consolidated Balance Sheet. As of December 31, 2013, the outstanding derivative was in a net asset position and is included in “Other Long-Term Assets” on the Consolidated Balance Sheet.
	The interest rate swaps that the Company has entered into are classified as cash flow hedges in accordance with accounting guidance on derivative instruments and hedging activities as they are hedging a forecasted transaction or the variability of cash flow to be paid by the Company. Changes in the fair value of a derivative that is qualified, designated and highly effective as a cash flow hedge are recorded in other comprehensive income, net of tax, until earnings are affected by the forecasted transaction or the variability of cash flow, and then are reported in current earnings.
	The Company formally documents all relationships between hedging instruments and hedged items, as well as the risk-management objective and strategy for undertaking various hedge transactions. This process includes linking all derivatives designated as cash flow hedges to specific forecasted transactions or variability of cash flow.
	The Company formally assesses, at both the hedge’s inception and on an ongoing basis, whether the derivatives used in hedging transactions are highly effective in offsetting changes in cash flow of hedged items. When it is determined that a derivative is not highly effective as a hedge then hedge accounting is discontinued prospectively in accordance with accounting guidance on derivative instruments and hedging activities. This has not occurred as all cash flow hedges contain no ineffectiveness. See Note 17, “Derivative Financial Instruments”, for further detail.
Income Taxes	Income Taxes
	The Company accounts for income taxes using the liability method in accordance with the accounting guidance for income taxes. The Company estimates actual current tax expense and assesses temporary differences that exist due to differing treatments of items for tax and financial statement purposes. These temporary differences result in the recognition of deferred tax assets and liabilities. A provision has not been made for deferred U.S. income taxes on the undistributed earnings of the Company’s foreign subsidiaries as these earnings have historically been permanently invested except to the extent a liability was recorded in purchase accounting for the undistributed earnings of the foreign subsidiaries of OKI as of the date of the acquisition. It is not practicable to determine the amount of unrecognized deferred tax liability for such unremitted foreign earnings.
	The current and deferred tax balances and income tax expense recognized by the Company are based on management’s interpretation of the tax laws of multiple jurisdictions. Income tax expense also reflects the Company’s best estimates and assumptions regarding, among other things, the level of future taxable income, interpretation of tax laws, and tax planning. Future changes in tax laws, changes in projected levels of taxable income, and tax planning could impact the effective tax rate and current and deferred tax balances recorded by the Company. Management’s estimates as of the date of the Consolidated Financial Statements reflect its best judgment giving consideration to all currently available facts and circumstances. As such, these estimates may require adjustment in the future, as additional facts become known or as circumstances change. Further, in accordance with the accounting guidance on income taxes, the tax effects from uncertain tax positions are recognized in the Consolidated Financial Statements, only if it is more likely than not that the position will be sustained upon examination, based on the technical merits of the position. The Company accounts for interest and penalties related to uncertain tax positions as a component of income tax expense.
Foreign Currency Translation	Foreign Currency Translation
	The functional currency for the Company’s foreign operations is the local currency. Assets and liabilities of these operations are translated into U.S. currency at the rates of exchange at the balance sheet date. The resulting translation adjustments are included in other comprehensive income (loss) in the Consolidated Statements of Comprehensive Income, a separate component of stockholders’ equity. Income and expense items are translated at average monthly rates of exchange. Realized gains and losses from foreign currency transactions were not material.
New Accounting Pronouncements	New Accounting Pronouncements
	In April 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity. This ASU modifies the definition of discontinued operations by limiting discontinued operations reporting to disposals of components of an entity that represent strategic shifts that have (or will have) a major effect on an entity’s operations and financial results. The update also requires additional financial statement disclosures about discontinued operations as well as disposal of an individually significant component of an entity that does not qualify for discontinued operations presentation. The updated guidance is effective prospectively for years beginning on or after December 15, 2014. In the fourth quarter of 2014, the Company elected to early adopt this guidance. This guidance was applied in the analysis of the accounting treatment of our fourth quarter 2014 divestiture of MBS Dev.
	In May 2014, the FASB issued ASU No. 2014-09, Revenue From Contracts With Customers, that outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. The ASU is based on the principle that an entity should recognize revenue to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The ASU also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments and assets recognized from costs incurred to fulfill a contract. Entities have the option of using either a full retrospective or a modified retrospective approach for the adoption of the new standard. This standard is effective for fiscal years beginning after December 15, 2016, including interim periods within that reporting period. The Company is currently evaluating the new guidance to determine the impact it will have on its consolidated financial statements.
	In June 2014, the FASB issued ASU No. 2014-12, Compensation—Stock Compensation (Topic 718): Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved After the Requisite Service Period. The standard requires that a performance target that affects vesting and that could be achieved after the requisite service period be treated as a performance condition, and compensation cost should be recognized in the period in which it becomes probable that the performance target will be achieved. This ASU is effective for fiscal years beginning after December 15, 2015, and for interim periods within those fiscal years. This new standard will not have an effect on the Company’s consolidated financial statements as it is in alignment with the Company’s current accounting policies for equity based compensation.

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Schedule of Deferred Tax Assets and Liabilities	ERROR: Could not retrieve Word content for note block
	The sources of these differences and the related tax effects were as follows (in thousands):
		As of December 31,
		2014						2013
		Assets			Liabilities			Assets			Liabilities
	Accrued expenses	$	12,299		$	-		$	14,615		$	-
	Allowance for doubtful accounts		7,452			-			7,815			-
	Depreciation and amortization		-			26,816			-			28,282
	Intangibles arising from acquisitions		-			22,184			-			23,689
	Inventory reserves and adjustments		-			28,092			-			28,783
	Pension and post-retirement		18,797			-			7,319			-
	Interest rate swap		-			211			-			591
	Share-based compensation		5,653			-			5,750			-
	Income tax credits, capital losses, and net operating losses		12,550			-			5,539			-
	Restructuring costs		273			-			1,930			-
	Other		819			-			376			-
	Total Deferred		57,843			77,303			43,344			81,345
	Valuation Allowance		(7,397	)		-			(2,791	)		-
	Net Deferred	$	50,446		$	77,303		$	40,553		$	81,345
Schedule of Provision for Income Taxes	The provision for income taxes consisted of the following (in thousands):
		For the Years Ended December 31,
		2014			2013			2012
	Currently Payable
	Federal	$	73,319		$	70,234		$	65,835
	State		8,333			8,027			6,683
	Total currently payable		81,652			78,261			72,518
	Deferred, net
	Federal		(5,736	)		(3,891	)		(5,790	)
	State		(631	)		(30	)		(923	)
	Total deferred, net		(6,367	)		(3,921	)		(6,713	)
	Provision for income taxes	$	75,285		$	74,340		$	65,805
Schedule of Effective Income Tax Rates Varied from Statutory Federal Income Tax Rate	The Company’s effective income tax rates for the years ended December 31, 2014, 2013 and 2012 varied from the statutory federal income tax rate as set forth in the following table (in thousands):
		Years Ended December 31,
		2014						2013						2012
		Amount			% of Pre-tax Income			Amount			% of Pre-tax Income			Amount			% of Pre-tax Income
	Tax provision based on the federal statutory rate	$	68,070			35	%	$	69,128			35	%	$	62,172			35	%
	State and local income taxes—net of federal income tax benefit		4,816			2.5	%		5,292			2.6	%		3,464			2	%
	Change in tax reserves and accrual adjustments		(115	)		(0.1	%)		(69	)		0	%		(521	)		(0.4	%)
	Non-deductible and other		2,514			1.3	%		(11	)		0	%		690			0.4	%
	Provision for income taxes	$	75,285			38.7	%	$	74,340			37.6	%	$	65,805			37	%
Schedule of Unrecognized Tax Benefits	The following table shows the changes in gross unrecognized tax benefits, for the years ended December 31, 2014, 2013 and 2012 (in thousands):
		2014			2013			2012
	Beginning Balance, January 1	$	3,108		$	3,134		$	3,374
	Additions based on tax positions taken during a prior period		123			169			308
	Reductions based on tax positions taken during a prior period		(11	)		(5	)		(11	)
	Additions based on tax positions taken during the current period		382			389			451
	Reductions related to settlement of tax matters		(70	)		(184	)		(490	)
	Reductions related to lapses of applicable statutes of limitation		(327	)		(395	)		(498	)
	Ending Balance, December 31	$	3,205		$	3,108		$	3,134

Basis_of_Presentation_Tables

Basis of Presentation (Tables)	12 Months Ended
	Dec. 31, 2014
CPO Commerce, Inc [Member]
Purchase Price Allocation	At December 31, 2014, the preliminary allocation of the purchase price is as follows (amounts in thousands):
					$	31,825
	Purchase Price, net of cash acquired…………………..
	Preliminary Allocation of Purchase Price:
	Accounts receivable……………………………………	$	(2,658	)
	Inventories……………………………………………..		(13,051	)
	Other current assets…………………………………….		(307	)
	Property, plant and equipment…………………………		(488	)
	Intangible assets………………………………………..		(12,800	)
	Total assets acquired……………………………….					(29,304	)
	Trade accounts payable………………………………..		17,124
	Accrued liabilities……………………………………..		2,130
	Deferred taxes…………………………………………		3,282
	Other long-term liabilities…………………………….		51
	Total liabilities assumed……………………………					22,587
	Goodwill………………………………………………				$	25,108
Summary of Purchased Identifiable Intangible Assets	The purchased identifiable intangible assets are as follows (amounts in thousands):
		Total			Estimated Life
	Customer relationships	$	5,200		3 years
	Trademark		7,600		15 years
	Total	$	12,800
MEDCO [Member]
Purchase Price Allocation	At December 31, 2014, the preliminary allocation of the purchase price is as follows (amounts in thousands):
					$	145,471
	Purchase Price, net of cash acquired…………………..
	Preliminary Allocation of Purchase Price:
	Accounts receivable……………………………………	$	(44,732	)
	Inventories……………………………………………..		(54,656	)
	Other current assets…………………………………….		(1,299	)
	Property, plant and equipment…………………………		(4,408	)
	Deferred Income tax assets…………………………….		(1,615	)
	Other assets……………………………………………..		(442	)
	Intangible assets………………………………………..		(44,070	)
	Total assets acquired……………………………….					(151,222	)
	Trade accounts payable………………………………..		32,383
	Accrued liabilities……………………………………..		3,830
	Other long-term liabilities…………………………….		52
	Total liabilities assumed……………………………					36,265
	Goodwill………………………………………………				$	30,514
Summary of Purchased Identifiable Intangible Assets	The purchased identifiable intangible assets are as follows (amounts in thousands):
		Total			Estimated Life
	Customer relationships	$	40,030		4-15 years
	Trademarks		4,040		3-15 years
	Total	$	44,070

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Schedule of Capitalized Software Included in Property, Plant and Equipment	Capitalized software is included in “Property, plant and equipment” on the Consolidated Balance Sheets. The total costs are as follows (in thousands):
		As of December 31,
		2014			2013
	Capitalized software development costs	$	91,624		$	83,026
	Accumulated amortization		(65,951	)		(59,257	)
	Net capitalized software development costs	$	25,673		$	23,769

ShareBased_Compensation_Tables

Share-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Schedule of Share-Based Compensation Expense	The following table summarizes the share-based compensation expense (in thousands):
		Year Ended December 31,
		2014			2013				2012
	Numerator:
	Pre-tax expense	$	8,195		$	10,808			$	8,746
	Tax effect		(3,114	)		(4,108	)			(3,323	)
	After tax expense	$	5,081		$	6,700			$	5,423
	Denominator:
	Denominator for basic shares—Weighted average shares		38,705			39,650				40,337
	Denominator for diluted shares—Adjusted weighted average shares and the effect of dilutive securities		39,130			40,236				40,991
	Net expense per share:
	Net expense per share—basic	$	0.13		$	0.17			$	0.13
	Net expense per share—diluted	$	0.13		$	0.17			$	0.13
Schedule of Intrinsic Value of Options Outstanding, Exercisable and Exercised		As of December 31,							Year ended December 31,
		Outstanding			Exercisable				Exercised
	2014	$	6,092		$	4,543			$	537
	2013		9,897			6,262				13,676
	2012		8,420			8,420				2,380
		As of December 31,			Year ended December 31,
		Outstanding			Vested
	2014	$	45,928		$	10,976
	2013		47,780			12,414
	2012		40,222			8,812
Schedule of Valuation Techniques Assumption	The assumptions used are shown in the following table.
		2014			2013
	Weighted average expected term		5.6				5.6
	Expected volatility		39.12	%	40.01 -		40.49	%
	Weighted average volatility		39.12	%			40.48	%
	Weighted average expected dividends		1.24	%			1.46	%
	Risk-free rate		1.75	%	0.76 -		1.62	%
Schedule of Stock Options	The following table summarizes the transactions, excluding restricted stock, under the Company’s equity compensation plans for the last three years:
					Weighted							Weighted					Weighted
					Average							Average					Average
					Exercise							Exercise					Exercise
		2014			Price				2013			Price		2012			Price
	Options outstanding—January 1		812,160		$	33.7				1,371,850		$	24.86		1,715,380		$	24.62
	Granted		5,538			45.89				585,189			38.71		-			-
	Exercised		(32,610	)		24.43				(1,065,920	)		24.69		(217,634	)		18.69
	Cancelled		(57,710	)		38.74				(78,959	)		38.69		(125,896	)		32.35
	Options outstanding—December 31		727,378		$	33.81				812,160		$	33.7		1,371,850		$	24.86
	Number of options exercisable		273,320		$	25.54				305,930		$	25.42		1,371,850		$	24.86
Schedule of Outstanding and Exercisable Options Granted	The following table summarizes outstanding and exercisable options granted under the Company’s equity compensation plans as of December 31, 2014:
					Remaining
					Contractual
	Exercise Prices	Outstanding			Life (Years)				Exercisable
	20.00 - 25.00		178,382			1.4				178,382
	25.01 - 30.00		92,692			2.7				92,692
	30.01 - 35.00		2,246			2.4				2,246
	35.01 - 40.00		448,520			8.3				-
	40.01 - 50.00		5,538			9				-
	Total		727,378			5.9				273,320
Schedule of Restricted Stock and RSU Grants and Changes	The following table summarizes restricted stock and RSU transactions for the last three years.
					Weighted							Weighted					Weighted
					Average							Average					Average
					Grant Date							Grant Date					Grant Date
	Restricted Stock and RSUs	2014			Fair Value				2013			Fair Value		2012			Fair Value
	Nonvested—January 1		1,041,189		$	31.24				1,297,906		$	28.61		1,002,125		$	26.42
	Granted		429,759			40.52				348,264			38.28		707,249			27.84
	Vested		(237,739	)		41.59				(323,159	)		37.02		(324,345	)		22
	Cancelled		(143,835	)		34.04				(281,822	)		30.04		(87,123	)		28.16
	Nonvested—December 31		1,089,374		$	31.23				1,041,189		$	31.24		1,297,906		$	28.61

Goodwill_and_Intangible_Assets1

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2014
Goodwill [Line Items]
Summary of Changes in Carrying Amount of Goodwill
	The changes in the carrying amount of goodwill are noted in the following table (in thousands):
	Goodwill, balance as of December 31,  2013	$	356,811
	Acquisition of CPO		25,108
	Acquisition of MEDCO		30,514
	Impairment of MBS Dev Goodwill		(9,034	)
	MBS Dev divestiture		(4,599	)
	Currency translation adjustment		(758	)
	Goodwill, balance as of December 31, 2014	$	398,042
Summary of Intangible Assets of Company by Major Class	The following table summarizes the intangible assets of the Company by major class of intangible assets and the cost, accumulated amortization, net carrying amount, and weighted average life, if applicable (in thousands):
		December 31, 2014									December 31, 2013
										Weighted								Weighted
										Average								Average
		Gross						Net		Useful	Gross					Net		Useful
		Carrying			Accumulated			Carrying		Life	Carrying		Accumulated			Carrying		Life
		Amount			Amortization			Amount		(years)	Amount		Amortization			Amount		(years)
	Intangible assets subject to amortization
	Customer relationships and other intangibles	$	125,761		$	(41,123	)	$	84,638	16	$	84,470	$	(36,232	)	$	48,238	17
	Non-compete agreements		4,672			(2,364	)		2,308	4		4,700		(1,952	)		2,748	4
	Trademarks		14,428			(1,716	)		12,712	13		2,890		(674	)		2,216	5
	Total	$	144,861		$	(45,203	)	$	99,658		$	92,060	$	(38,858	)	$	53,202
	Intangible assets not subject to amortization
	Trademarks		12,300			-			12,300	n/a		12,300	-				12,300	n/a
	Total	$	157,161		$	(45,203	)	$	111,958		$	104,360	$	(38,858	)	$	65,502
Summary of Amortization Expense Expected to be Incurred Over Next Five Years on Intangible Assets	The following table summarizes the amortization expense expected to be incurred over the next five years on intangible assets (in thousands):
	Year	Amounts
	2015	$	13,943
	2016		13,360
	2017		11,296
	2018		7,521
	2019		5,749
Mexican subsidiary [Member]
Goodwill [Line Items]
Carrying Amounts by Major Classes of Assets and Liabilities	As of December 31, 2014, the carrying amounts of the Mexican subsidiary by major classes of assets and liabilities included in the Consolidated Balance Sheet are as follows (in thousands):
		Amount
	ASSETS
	Current assets:
	Cash and cash equivalents	$	1,288
	Accounts receivable, less allowance for doubtful accounts		9,355
	Inventories		14,757
	Other current assets		261
	Total current assets		25,661
	Property, plant and equipment, at cost
	Fixtures and equipment		589
	Capitalized software costs		109
	Total property, plant and equipment		698
	Less: accumulated depreciation and amortization		576
	Net property, plant equipment		122
	Goodwill		4,621
	Other assets		658
	Total assets	$	31,062
	LIABILITIES
	Current liabilities:
	Accounts payable		5,242
	Accrued liabilities		1,651
	Total current liabilities		6,893
	Other long-term liabilities		7
	Total liabilities	$	6,900

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Loss (Tables)	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Change in Accumulated Other Comprehensive Income (Loss) (AOCI) by Component, Net of Tax	The change in Accumulated Other Comprehensive Income (Loss) (“AOCI”) by component, net of tax, for the year ended December 31, 2014 is as follows:
	(amounts in thousands)	Foreign Currency Translation			Cash Flow Hedges			Defined Benefit Pension Plans			Total
	AOCI, balance as of December 31, 2013	$	(6,661	)	$	871		$	(34,098	)	$	(39,888	)
	Other comprehensive (loss) income before reclassifications		(5,262	)		(1,063	)		(19,400	)		(25,725	)
	Amounts reclassified from AOCI		-			466			2,356			2,822
	Net other comprehensive (loss) income		(5,262	)		(597	)		(17,044	)		(22,903	)
	AOCI, balance as of December 31, 2014	$	(11,923	)	$	274		$	(51,142	)	$	(62,791	)
Amounts Reclassified Out of AOCI into Income Statement	The following table details the amounts reclassified out of AOCI into the income statement during the twelve-month period ending December 31, 2014 respectively:
		Amount Reclassified From AOCI
		For the Twelve
		Months Ended
		December 31,			Affected Line Item In The Statement
	Details About AOCI Components	2014			Where Net Income is Presented
	Gain on interest rate swap cash flow hedges, before tax	$	751		Interest expense, net
			(285	)	Tax provision
		$	466		Net of tax
	Amortization of defined benefit pension plan items:
	Prior service cost and unrecognized loss	$	3,856		Warehousing, marketing and administrative expenses
			(1,500	)	Tax provision
			2,356		Net of tax
	Total reclassifications for the period	$	2,822		Net of tax

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Schedule of Computation of Basic and Diluted Earnings Per Share	The following table sets forth the computation of basic and diluted earnings per share (in thousands, except per share data):
		Years Ended December 31,
		2014		2013		2012
	Numerator:
	Net income	$	119,198	$	123,170	$	111,830
	Denominator:
	Denominator for basic earnings per share -
	weighted average shares		38,705		39,650		40,337
	Effect of dilutive securities:
	Employee stock options and restricted units		425		586		654
	Denominator for diluted earnings per share -
	Adjusted weighted average shares and the effect of dilutive
	securities		39,130		40,236		40,991
	Net income per share:
	Net income per share - basic	$	3.08	$	3.11	$	2.77
	Net income per share - diluted	$	3.05	$	3.06	$	2.73

Segment_Information_Tables

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Schedule of Net Sales by Product Category	The following table shows net sales by product category for 2014, 2013 and 2012 (in thousands):
		Years Ended December 31
		2014 (1)		2013 (1)		2012 (1)
	Janitorial and breakroom supplies	$	1,448,528	$	1,336,182	$	1,281,806
	Technology products		1,437,721		1,462,756		1,558,568
	Traditional office products		1,331,797		1,314,456		1,373,399
	Industrial supplies		638,752		517,810		409,266
	Office furniture		309,003		311,403		323,390
	Freight revenue		121,933		105,567		99,319
	Other		39,471		37,119		34,358
	Total net sales	$	5,327,205	$	5,085,293	$	5,080,106
	-1	Certain prior period amounts have been reclassified to conform to the current presentation. Such reclassifications include changes between several product categories due to several specific products being reclassified to different categories. These changes did not impact the Consolidated Statements of Income.

Debt_Tables

Debt (Tables)	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Schedule of Long-Term Debt Components	Debt consisted of the following amounts (in millions):
		As of		As of
		December 31, 2014		December 31, 2013
	2013 Credit Agreement	$	363	$	206.8
	2013 Note Purchase Agreement		150		-
	2007 Note Purchase Agreement		-		135
	Receivables Securitization Program		200		190.7
	OKI Mortgage & Capital Lease		0.9		1.2
	Total	$	713.9	$	533.7
Schedule of Debt Maturities	Debt maturities as of December 31, 2014, were as follows (in millions):
	Year	Amount
	2015	$	0.9
	2016		-
	2017		-
	2018		563
	Thereafter		150
	Total	$	713.9

Leases_Contractual_Obligations1

Leases, Contractual Obligations and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2014
Commitments And Contingencies Disclosure [Abstract]
Schedule of Future Minimum Lease Payments under Operating Leases	The Company has entered into non-cancelable long-term leases for certain property and equipment. Future minimum lease payments under operating leases in effect as of December 31, 2014 having initial or remaining non-cancelable lease terms in excess of one year are as follows (in thousands):
		Operating
	Year	Leases
	2015	$	49,778
	2016		42,854
	2017		33,693
	2018		25,676
	2019		22,178
	Thereafter		29,469
	Total required lease payments		203,648

Pension_Plans_and_Defined_Cont1

Pension Plans and Defined Contribution Plan (Tables)	12 Months Ended
	Dec. 31, 2014
Compensation And Retirement Disclosure [Abstract]
Schedule of Reconciliation of Changes in Projected Benefit Obligation	The following table sets forth the plans’ changes in Projected Benefit Obligation for the years ended December 31, 2014 and 2013 (in thousands):
			2014				2013
	Benefit obligation at beginning of year		$	183,069			$	196,521
	Service cost—benefit earned during the period			1,069				1,479
	Interest cost on projected benefit obligation			8,960				8,379
	Union plan amendments			1,736				-
	Actuarial (gain) loss			35,054				(16,373	)
	Benefits paid			(5,802	)			(6,937	)
	Benefit obligation at end of year		$	224,086			$	183,069
Schedule of Change in Plan Asset	The following table sets forth the change in the plans’ assets for the years ended December 31, 2014 and 2013 (in thousands):
			2014				2013
	Fair value of plan assets at beginning of year		$	162,250			$	145,563
	Actual return on plan assets			15,323				10,624
	Company contributions			2,000				13,000
	Benefits paid			(5,802	)			(6,937	)
	Fair value of plan assets at end of year		$	173,771			$	162,250
Schedule of Pension Plan Investment Allocations	The Company’s pension plan investment allocations, as a percentage of the fair value of total plan assets, as of December 31, 2014 and 2013, by asset category are as follows:
	Asset Category		2014				2013
	Cash			1.1	%			1.2	%
	Equity securities			29.6	%			29.2	%
	Fixed income			45.4	%			42.5	%
	Real assets			13.6	%			16.6	%
	Hedge funds			10.3	%			10.5	%
	Total			100	%			100	%
Schedule of Fair Values of Pension Plan Assets	The fair values of the Company’s pension plan assets at December 31, 2014 and 2013 by asset category are as follows:
	Fair Value Measurements at
	December 31, 2014 (in thousands)
									Quoted Prices In				Significant		Significant
									Active Markets for				Observable		Unobservable
									Identical Assets				Inputs		Inputs
	Asset Category				Total				(Level 1)				(Level 2)		(Level 3)
	Cash				$	1,831			$	1,831
	Equity Securities
	U.S. Large Cap		(a)			18,612				18,612
	International Large Value		(c)			16,791				16,791
	Emerging Markets		(d)			9,653				9,653
	U.S. Small Value Fund		(e)			5,274				5,274
	U.S. Small Growth Fund		(f)			1,123				1,123
	Fixed Income
	U.S. Fixed Income		(g)			78,886				78,886
	Real Assets
	Domestic Real Estate		(h)			13,870				13,870
	Commodities		(i)			9,789				9,789
	Hedge Funds
	Hedge Funds		(j)			17,941								17,941
	Total				$	173,770			$	155,829			$	17,941	$	-
	Fair Value Measurements at
	December 31, 2013 (in thousands)
									Quoted Prices In				Significant		Significant
									Active Markets for				Observable		Unobservable
									Identical Assets				Inputs		Inputs
	Asset Category				Total				(Level 1)				(Level 2)		(Level 3)
	Cash				$	1,888			$	1,888
	Equity Securities
	U.S. Large Cap		(a)			17,380				17,380
	International Large Core		(b)			7,650				7,650
	International Large Value		(c)			7,598				7,598
	Emerging Markets		(d)			8,502				8,502
	U.S. Small Value Fund		(e)			5,058				5,058
	U.S. Small Growth Fund		(f)			1,211				1,211
	Fixed Income
	U.S. Fixed Income		(g)			69,070				69,070
	Real Assets
	Domestic Real Estate		(h)			11,638				11,638
	Commodities		(i)			15,246				15,246
	Hedge Funds
	Hedge Funds		(j)			17,009								17,009
	Total				$	162,250			$	145,241			$	17,009	$	-
	(a)	A separately managed, diversified portfolio consisting of publically traded large cap stocks. The portfolio is predominately comprised of U.S. companies but may also hold international company stock.
	(b)	A daily valued mutual fund investment. The fund invests in publically traded companies domiciled outside the U.S. and includes companies located in emerging market countries.
	(c) A daily valued open-ended mutual fund. This fund invests in common stocks of companies domiciled in countries outside of the U.S.
	(d)	A daily valued mutual fund investment. The fund invests in publically traded companies domiciled in emerging market countries.
	(e)	A daily valued mutual fund investment. The fund invests in publically traded, small capitalization companies that are considered value in style. The majority of holdings are domiciled in the U.S. though the fund may hold international stocks.
	(f)	A daily valued mutual fund investment. The fund invests in publically traded, small capitalization companies that are considered growth in style. The majority of holdings are domiciled in the U.S. though the fund may hold international stocks.
	(g)	A separately managed fixed income portfolio utilized to match the duration of the Plan’s liabilities. This liability driven investment portfolio is comprised of Treasury securities including STRIPS and zero coupon bonds as well as high quality corporate bonds.
	(h) A daily valued mutual fund investment. The fund invests in publically traded Real Estate Investment Trusts. This is an index mutual fund that tracks the Morgan Stanley REIT Index. The fund normally invests at least 98% of assets that are included in the Morgan Stanley REIT Index.
	(i) A daily valued mutual fund investment. This fund combines a commodities position, typically through swap agreements, with a portfolio of inflation indexed bonds and other fixed income securities. The commodities position is constructed to track the performance of the Dow Jones UBS Commodity Index.
	(j)	A separately managed fund of hedge funds. This fund seeks attractive risk-adjusted returns through investments in a well-diversified group of managers that employ a variety of unique investment strategies. It targets low volatility and low correlation to traditional asset classes. This fund may allocate its assets among a select group of non-traditional portfolio managers that invest or trade in a wide range of securities and other instruments, including, but not limited to: equities and fixed income securities, currencies, commodities, futures contracts, options and other derivative instruments.  This fund was sold prior to December 31, 2014 but the transaction did not settle until January 2015.
Schedule of Plan Funded Status	The following table sets forth the plans’ funded status as of December 31, 2014 and 2013 (in thousands):
			2014				2013
	Funded status of the plan		$	(50,316	)		$	(20,820	)
	Unrecognized prior service cost			3,166				1,613
	Unrecognized net actuarial loss			79,502				53,158
	Net amount recognized		$	32,352			$	33,951
Schedule of Amounts Recognized in Consolidated Balance Sheets	Amounts Recognized in Consolidated Balance Sheets
			2014				2013
	Accrued benefit liability		$	(50,316	)		$	(20,820	)
	Accumulated other comprehensive income			82,668				54,771
	Net amount recognized		$	32,352			$	33,951
Schedule of Components of Net Periodic Pension Cost	Net periodic pension cost for the years ended December 31, 2014, 2013 and 2012 for pension and supplemental benefit plans includes the following components (in thousands):
		Pension Benefits
			For the Years Ended December 31,
			2014				2013				2012
	Service cost - benefit earned during the period		$	1,069			$	1,479			$	962
	Interest cost on projected benefit obligation			8,960				8,379				8,417
	Expected return on plan assets			(10,286	)			(11,338	)			(10,005	)
	Amortization of prior service cost			182				192				176
	Amortization of actuarial loss			3,674				5,741				6,194
	Net periodic pension cost		$	3,599			$	4,453			$	5,744
Schedule of Actuarial Assumptions for Discount Rates, Expected Long-Term Rates of Return on Plan Assets, and Rates of Increase in Compensation and Healthcare Costs	The following tables summarize the Company’s actuarial assumptions for discount rates, expected long-term rates of return on plan assets, and rates of increase in compensation for the years ended December 31, 2014, 2013 and 2012:
			2014				2013				2012
	Pension plan assumptions:
	Assumed discount rate, general			4.09%				4.95%				4.30%
	Assumed discount rate, union			4.16%				5.10%				4.45%
	Expected long-term rate of return on plan assets, general			6.30%				7.30%				7.75%
	Expected long-term rate of return on plan assets, union			7.30%				7.75%				7.75%
Schedule of Estimated Future Benefit Payments	The estimated future benefit payments under the Company’s pension plans are as follows (in thousands):
			Amounts
	2015		$	6,130
	2016			7,376
	2017			7,951
	2018			8,117
	2019			9,165
	2020-2024			55,313

Supplemental_Cash_Flow_Informa1

Supplemental Cash Flow Information (Tables)	12 Months Ended
	Dec. 31, 2014
Supplemental Cash Flow Elements [Abstract]
Schedule of Supplemental Disclosures of Cash Flow Information	In addition to the information provided in the Consolidated Statements of Cash Flows, the following are supplemental disclosures of cash flow information for the years ended December 31, 2014, 2013 and 2012 (in thousands):
		Years Ended December 31
		2014		2013		2012
	Cash Paid During the Year For:
	Interest	$	12,822	$	12,385	$	22,563
	Income taxes, net		76,205		79,526		53,053

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Schedule of Estimated Fair Value of Financial Instruments	The estimated fair values of the Company’s financial instruments are as follows (in thousands):
		As of  December 31,
		2014				2013
		Carrying Amount		Fair Value		Carrying Amount		Fair Value
	Cash and cash equivalents	$	20,812	$	20,812	$	22,326	$	22,326
	Accounts receivable, net		702,527		702,527		643,379		643,379
	Convertible note receivable		6,775		6,775		-		-
	Non-convertible note receivable		2,800		2,800		-		-
	Accounts payable		485,241		485,241		476,113		476,113
	Debt		713,909		713,909		533,697		533,697
	Long-term interest rate swap liability		253		253		-		-
	Long-term interest rate swap asset		-		-		599		599

Other_Assets_and_Liabilities_T

Other Assets and Liabilities (Tables)	12 Months Ended
	Dec. 31, 2014
Regulatory Assets And Liabilities Disclosure [Abstract]
Schedule of Other Assets and Liabilities	Other assets and liabilities as of December 31, 2014 and 2013 were as follows (in thousands):
		As of  December 31,
		2014		2013
	Other Long-Term Assets, net:
	Investment in deferred compensation	$	4,984	$	4,408
	Long-term prepaid assets		19,055		14,063
	Long-term convertible and non-convertible notes receivable		9,575		-
	Capitalized financing costs		3,141		3,391
	Long-term swap asset		-		599
	Long-term income tax asset		2,881		-
	Other		2,174		3,115
	Total other long-term assets, net	$	41,810	$	25,576
	Other Long-Term Liabilities:
	Accrued pension obligation	$	50,316	$	20,820
	Deferred rent		16,241		18,654
	Deferred directors compensation		5,016		4,412
	Long-term swap liability		253		-
	Long-term income tax liability		3,639		3,482
	Long-term merger expenses		17,229		198
	Long-term workers compensation liability		7,155		6,876
	Other		4,545		5,345
	Total other long-term liabilities	$	104,394	$	59,787

Derivative_Financial_Instrumen1

Derivative Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2014
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Schedule of Interest Rate Swap Agreements, Cash Flow Hedge	The Company’s outstanding swap transaction is accounted for as cash flow hedge and is recorded at fair value on the statement of financial position as of December 31, 2014 and December 31, 2013. This hedge was as follows (in thousands):
		Notional									Fair Value Net
	As of December 31, 2014	Amount		Receive		Pay			Maturity Date		Liability (1)
	July 2012 Swap Transaction	$	150,000	Floating 1-month LIBOR			1.05%		July 18, 2017		$	253
	-1	This interest rate derivative qualifies for hedge accounting and is in a net liability position. Therefore, the fair value of the interest rate derivative is included in the Company’s Consolidated Balance Sheets as a component of “Other Long-Term Liabilities”, with an offsetting component in “Stockholders’ Equity” as part of “Accumulated Other Comprehensive Loss”.
		Notional									Fair Value Net
	As of December 31, 2013	Amount		Receive		Pay			Maturity Date		Asset (1)
	July 2012 Swap Transaction	$	150,000	Floating 1-month LIBOR			1.05%		July 18, 2017		$	599
	-1	This interest rate derivative qualifies for hedge accounting and is in a net asset position. Therefore, the fair value of the interest rate derivative included in the Company’s Consolidated Balance Sheets as a component of “Other Long-Term Assets” with an offsetting component in “Stockholders’ Equity” as part of “Accumulated Other Comprehensive Loss”.
Schedule of Effect of Derivative Instruments on Income Statement	The following table depicts the effect of these derivative instruments on the statements of income and comprehensive income for years ended December 31, 2014 and 2013.
		Amount of Gain (Loss)						Location of Gain (Loss)	Amount of Gain (Loss)
		Recognized in						Reclassified from	Reclassified
		OCI on Derivative						Accumulated OCI into	from Accumulated OCI into Income
		(Effective Portion)						Income (Effective	(Effective Portion)
								Portion)
		2014		2013					2014				2013
	November 2007 Swap Transaction	$	-	$	(77	)		Interest expense, net	$	-			$	(228	)
	July 2012 Swap Transaction		105		864			Interest expense, net		625				-
	June 2013 Swap Transaction		-		569			Interest expense, net		-				-

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Schedule of Financial Instruments Measured at Fair Value	The following table summarizes the financial instruments measured at fair value in the accompanying Consolidated Balance Sheets as of December 31, 2014 and 2013 (in thousands):
		Fair Value Measurements as of December 31, 2014
				Quoted Market		Significant Other		Significant
				Prices in Active		Observable		Unobservable
				Markets for		Inputs		Inputs
				Identical Assets  or
				Liabilities
		Total		Level 1		Level 2		Level 3
	Assets
	Convertible note receivable	$	6,775	$	-	$	-	$	6,775
	Non-convertible note receivable		2,800		-		-		2,800
	Liabilities
	Interest rate swap liability		253		-		253		-
	Total	$	9,828	$	-	$	253	$	9,575
		Fair Value Measurements as of December 31, 2013
				Quoted Market		Significant Other		Significant
				Prices in Active		Observable		Unobservable
				Markets for		Inputs		Inputs
				Identical Assets  or
				Liabilities
		Total		Level 1		Level 2		Level 3
	Assets
	Interest rate swap asset	$	599	$	-	$	599	$	-

Quarterly_Financial_DataUnaudi1

Quarterly Financial Data-Unaudited (Tables)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Financial Data
		First Quarter		Second Quarter		Third Quarter		Fourth Quarter		Total(1)
		(dollars in thousands, except per share data)
	Year Ended December 31, 2014:
	Net sales	$	1,254,139	$	1,320,037	$	1,419,947	$	1,333,082	$	5,327,205
	Gross profit		187,083		199,460		211,028		212,930	$	810,501
	Net income(2)		21,857		33,331		38,169		25,841	$	119,198
	Net income per share—basic	$	0.56	$	0.86	$	0.99	$	0.67	$	3.08
	Net income per share—diluted	$	0.55	$	0.85	$	0.98	$	0.67	$	3.05
	Year Ended December 31, 2013:
	Net sales	$	1,250,485	$	1,274,494	$	1,336,676	$	1,223,638	$	5,085,293
	Gross profit		188,525		201,936		203,661		195,456		789,578
	Net income(3)		13,874		34,670		40,501		34,125		123,170
	Net income per share—basic	$	0.35	$	0.87	$	1.03	$	0.86	$	3.11
	Net income per share—diluted	$	0.34	$	0.86	$	1.01	$	0.85	$	3.06
	(1) As a result of changes in the number of common and common equivalent shares during the year, the sum of quarterly earnings per share will not necessarily equal earnings per share for the total year.
	(2) 2014 results were impacted by a loss on disposition of MBS Dev totaling $8.2 million or $0.21 per diluted share in the fourth quarter. This loss was not fully recognizable for tax.
	(3) 2013 results were impacted by the effects of a $13.0 million or $0.20 per diluted share workforce reduction and facility closure charge in the first quarter, and a non-tax deductible $1.2 million or $0.03 per diluted share asset impairment charge in the fourth quarter.

Basis_of_Presentation_Addition

Basis of Presentation - Additional Information (Detail) (USD $)	3 Months Ended									12 Months Ended			0 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Oct. 31, 2014
	Product									Location
	Manufacturers_Distributors									Customer
										Product
										Manufacturers_Distributors
Basis Of Presentation [Line Items]
Net sales	$1,333,082,000	$1,419,947,000	$1,320,037,000	$1,254,139,000	$1,223,638,000	$1,336,676,000	$1,274,494,000	$1,250,485,000		$5,327,205,000	$5,085,293,000	$5,080,106,000
Number of items	160,000									160,000
Number of manufacturers	1,600									1,600
Number of distribution centers										77
Number of reseller customer										30,000
Business acquisition cash paid									90,000,000
Purchase Price									79,800,000			79,800,000
Write off of investment					1,200,000
O.K.I. Supply Co. [Member]
Basis Of Presentation [Line Items]
Amount payable related to acquisition	4,500,000									4,500,000
Contribution to the Company's net financial sales										20,500,000
Pro forma net sales												5,200,000,000
Pro forma net income												112,600,000
CPO Commerce, Inc [Member]
Basis Of Presentation [Line Items]
Business acquisition cash paid										37,400,000
Amount payable related to acquisition	51,000									51,000
Business acquisition, fair value of contingent consideration	5,100,000									5,100,000
Business acquisition contingent consideration payments, range minimum	0									0
Business acquisition contingent consideration payments, range maximum	10,000,000									10,000,000
Stock acquisition, percentage acquired	100.00%									100.00%
MEDCO [Member]
Basis Of Presentation [Line Items]
Business acquisition cash paid													150,000,000
Amount payable related to acquisition	52,000									52,000			6,000,000
Contribution to the Company's net financial sales										36,300,000
Pro forma net sales										5,500,000,000	5,300,000,000	5,300,000,000
Pro forma net income										125,000,000	129,000,000	119,200,000
Business acquisition, fair value of contingent consideration													4,800,000
Business acquisition contingent consideration payments, range minimum													0
Business acquisition contingent consideration payments, range maximum													$10,000,000
Business acquisition acquired entity indemnification payment period													18 months

Basis_of_Presentation_Purchase

Basis of Presentation - Purchase Price Allocation (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Oct. 31, 2014
Preliminary Allocation of Purchase Price:
Goodwill	$398,042	$356,811
CPO Commerce, Inc [Member]
Business Acquisition [Line Items]
Purchase price, net of cash acquired	31,825
Preliminary Allocation of Purchase Price:
Accounts receivable	-2,658
Inventories	-13,051
Other current assets	-307
Property, plant and equipment	-488
Intangible assets	-12,800
Total assets acquired	-29,304
Trade accounts payable	17,124
Accrued liabilities	2,130
Deferred taxes	3,282
Other long-term liabilities	51
Total liabilities assumed	22,587
Goodwill	25,108
MEDCO [Member]
Business Acquisition [Line Items]
Purchase price, net of cash acquired	145,471
Preliminary Allocation of Purchase Price:
Accounts receivable	-44,732
Inventories	-54,656
Other current assets	-1,299
Property, plant and equipment	-4,408
Deferred Income tax assets	-1,615
Other assets	-442
Intangible assets	-44,070
Total assets acquired	-151,222
Trade accounts payable	32,383
Accrued liabilities	3,830
Other long-term liabilities	52		6,000
Total liabilities assumed	36,265
Goodwill	$30,514

Basis_of_Presentation_Summary_

Basis of Presentation - Summary of Purchased Identifiable Intangible Assets (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014
CPO Commerce, Inc [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Finite lived intangible assets	$12,800
MEDCO [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Finite lived intangible assets	44,070
Customer relationships [Member] | CPO Commerce, Inc [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Finite lived intangible assets	5,200
Finite lived intangible assets estimated life	3 years
Customer relationships [Member] | MEDCO [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Finite lived intangible assets	40,030
Customer relationships [Member] | MEDCO [Member] | Minimum [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Finite lived intangible assets estimated life	4 years
Customer relationships [Member] | MEDCO [Member] | Maximum [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Finite lived intangible assets estimated life	15 years
Trademarks [Member] | CPO Commerce, Inc [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Finite lived intangible assets	7,600
Finite lived intangible assets estimated life	15 years
Trademarks [Member] | MEDCO [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Finite lived intangible assets	$4,040
Trademarks [Member] | MEDCO [Member] | Minimum [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Finite lived intangible assets estimated life	3 years
Trademarks [Member] | MEDCO [Member] | Maximum [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Finite lived intangible assets estimated life	15 years

Summary_of_Significant_Account3

Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	Plans
Summary Of Significant Accounting Policies [Line Items]
Accounts receivable, less allowance for doubtful accounts of $19,725 in 2014 and $20,608 in 2013	$702,527,000	$643,379,000
Accrued liabilities	63,200,000	52,600,000
Number of compensation plans	2
Percentage inventory valued under LIFO	74.00%	76.00%
Higher inventory if FIFO applied entirely	118,600,000	112,400,000
Increase (decrease) in cost of goods sold due to LIFO accounting method	6,200,000	4,600,000	11,700,000
Effect of LIFO inventory liquidation on income	6,000,000	600,000	3,300,000
LIFO expense related to inflation increase in cost of sales	12,200,000	5,200,000	15,000,000
Warehousing and administrative expenses charged to inventory	43,300,000	38,000,000
Pension expense	3,600,000	4,500,000	5,700,000
Outstanding checks	62,100,000	60,800,000
Minimum [Member] | Fixtures And Equipment [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	2 years
Maximum [Member] | Fixtures And Equipment [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	10 years
Maximum [Member] | Building [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	40 years
Maximum [Member] | Capitalized Software [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	10 years
Supplier Allowances [Member]
Summary Of Significant Accounting Policies [Line Items]
Accounts receivable, less allowance for doubtful accounts of $19,725 in 2014 and $20,608 in 2013	$124,400,000	$103,200,000

Summary_of_Significant_Account4

Summary of Significant Accounting Policies - Schedule of Capitalized Software Included in Property, Plant and Equipment (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Accounting Policies [Abstract]
Capitalized software development costs	$91,624	$83,026
Accumulated amortization	-65,951	-59,257
Net capitalized software development costs	$25,673	$23,769

ShareBased_Compensation_Additi

Share-Based Compensation - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of share-based compensation plans	2
Closing sale price per share	42.16	45.89	30.99
Stock options granted	5,538	585,189
Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Payout based on economic profit performance against target economic profit goals	0.00%	0.00%	0.00%
Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Payout based on economic profit performance against target economic profit goals	200.00%	200.00%	150.00%
Stock Option [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period, in years	2 years 3 months	3 years
Term of stock options, in years	10 years
Unrecognized compensation cost	2.5
Share-based compensation, weighed -average period for recognition	1 year 3 months
Stock options granted	5,538	585,189	0
Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period, in years	3 years
Restricted stock and restricted stock units granted	253,042	181,916	461,512
Diluted earnings per share required to determine specific performance measure of stock awards	0.5
Restricted Stock Units (RSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period, in years	3 years
Unrecognized compensation cost	12.9
Share-based compensation, weighed -average period for recognition	2 years 1 month 6 days
Restricted stock and restricted stock units granted	176,717	166,348	245,737
Non Employee Directors [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Compensation expense, directors fees	0.1	0.1	0.2
Accumulated number of stock units outstanding	43,082	56,737	62,421
Restricted stock and restricted stock units granted	20,664	23,898	41,051
Employees [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock and restricted stock units granted	271,594	194,517	426,064
Executive Officer [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock and restricted stock units granted	137,501	129,849	240,134
Terms of granting restricted stock and restricted stock units	(1) the officer is still employed as of the anniversary date of the grant; and (2) the Company’s cumulative diluted earnings per share for the four calendar quarters immediately preceding the vesting date exceed $0.50 per diluted share as defined in the officers’ restricted stock agreement.

ShareBased_Compensation_Schedu

Share-Based Compensation - Schedule of Share-Based Compensation Expense (Detail) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Pre-tax expense	$8,195	$10,808	$8,746
Tax effect	-3,114	-4,108	-3,323
After tax expense	$5,081	$6,700	$5,423
Denominator for basic shares-Weighted average shares	38,705	39,650	40,337
Denominator for diluted shares-Adjusted weighted average shares and the effect of dilutive securities	39,130	40,236	40,991
Net expense per share-basic	$0.13	$0.17	$0.13
Net expense per share-diluted	$0.13	$0.17	$0.13

ShareBased_Compensation_Schedu1

Share-Based Compensation - Schedule of Intrinsic Value of Options Outstanding, Exercisable and Exercised (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Intrinsic Value of Options, Outstanding	$6,092	$9,897	$8,420
Intrinsic Value of Options, Exercisable	4,543	6,262	8,420
Intrinsic Value of Options, Exercised	$537	$13,676	$2,380

ShareBased_Compensation_Schedu2

Share-Based Compensation - Schedule of Intrinsic Value of Restricted Shares Outstanding and Vested (Detail) (Restricted Stock [Member], USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Intrinsic Value of Restricted Shares	$45,928	$47,780	$40,222
Intrinsic Value of Restricted Shares Vested	$10,976	$12,414	$8,812

ShareBased_Compensation_Schedu3

Share-Based Compensation - Schedule of Valuation Techniques Assumptions (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Weighted average expected term	5 years 7 months 6 days	5 years 7 months 6 days
Expected volatility	39.12%
Expected volatility, minimum		40.01%
Expected volatility, maximum		40.49%
Weighted average volatility	39.12%	40.48%
Weighted average expected dividends	1.24%	1.46%
Risk-free rate	1.75%
Risk-free rate, minimum		0.76%
Risk-free rate, maximum		1.62%

ShareBased_Compensation_Schedu4

Share-Based Compensation - Schedule of Stock Options (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Options outstanding - Beginning Balance, Shares	812,160	1,371,850	1,715,380
Granted, Shares	5,538	585,189
Exercised, Shares	-32,610	-1,065,920	-217,634
Cancelled, Shares	-57,710	-78,959	-125,896
Options outstanding - Ending Balance, Shares	727,378	812,160	1,371,850
Number of options exercisable, Shares	273,320	305,930	1,371,850
Options outstanding - Beginning Balance, Weighted Average Exercise Price	$33.70	$24.86	$24.62
Granted, Weighted Average Exercise Price	$45.89	$38.71
Exercised, Weighted Average Exercise Price	$24.43	$24.69	$18.69
Cancelled, Weighted Average Exercise Price	$38.74	$38.69	$32.35
Options outstanding - Ending Balance, Weighted Average Exercise Price	$33.81	$33.70	$24.86
Number of options exercisable, Weighted Average Exercise Price	$25.54	$25.42	$24.86

ShareBased_Compensation_Schedu5

Share-Based Compensation - Schedule of Outstanding and Exercisable Options Granted (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Outstanding	727,378
Remaining Contractual Life (Years)	5 years 10 months 24 days
Exercisable	273,320
20.00-25.00 [Member]
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Lower exercise price	20
Upper exercise price	25
Outstanding	178,382
Remaining Contractual Life (Years)	1 year 4 months 24 days
Exercisable	178,382
25.01-30.00 [Member]
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Lower exercise price	25.01
Upper exercise price	30
Outstanding	92,692
Remaining Contractual Life (Years)	2 years 8 months 12 days
Exercisable	92,692
30.01 - 35.00 [Member]
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Lower exercise price	30.01
Upper exercise price	35
Outstanding	2,246
Remaining Contractual Life (Years)	2 years 4 months 24 days
Exercisable	2,246
35.01 - 40.00 [Member]
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Lower exercise price	35.01
Upper exercise price	40
Outstanding	448,520
Remaining Contractual Life (Years)	8 years 3 months 18 days
40.01 - 50.00 [Member]
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Lower exercise price	40.01
Upper exercise price	50
Outstanding	5,538
Remaining Contractual Life (Years)	9 years

ShareBased_Compensation_Schedu6

Share-Based Compensation - Schedule of Restricted Stock and RSU Grants and Changes (Detail) (Restricted Stock and RSUs [Member], USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Restricted Stock and RSUs [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Beginning Balance, Shares outstanding	1,041,189	1,297,906	1,002,125
Granted, Shares	429,759	348,264	707,249
Vested, Shares	-237,739	-323,159	-324,345
Cancelled, Shares	-143,835	-281,822	-87,123
Ending Balance, Shares outstanding	1,089,374	1,041,189	1,297,906
Shares outstanding - Weighted Average Grant Date Fair Value	$31.24	$28.61	$26.42
Granted, Weighted Average Grant Date Fair Value	$40.52	$38.28	$27.84
Vested, Weighted Average Grant Date Fair Value	$41.59	$37.02	$22
Cancelled, Weighted Average Grant Date Fair Value	$34.04	$30.04	$28.16
Shares outstanding - Weighted Average Grant Date Fair Value	$31.23	$31.24	$28.61

Goodwill_and_Intangible_Assets2

Goodwill and Intangible Assets - Additional Information (Detail) (USD $)	12 Months Ended			3 Months Ended	12 Months Ended	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2012
Goodwill And Intangible Assets [Line Items]
Goodwill impairment	$9,034,000
Loss on disposition of MBS Dev	8,234,000
Goodwill	398,042,000	356,811,000
Intangible assets, net	111,958,000	65,502,000
Amortization of intangible assets purchased	8,623,000	6,985,000	6,083,000
Accumulated amortization of intangible assets	45,203,000	38,858,000
Accumulated other comprehensive income related to subsidiary's deferred foreign exchange loss	9,400,000
Forecast [Member] | Mexican subsidiary [Member] | Minimum [Member]
Goodwill And Intangible Assets [Line Items]
Impairment of intangible assets				12,000,000
Forecast [Member] | Mexican subsidiary [Member] | Maximum [Member]
Goodwill And Intangible Assets [Line Items]
Impairment of intangible assets				16,000,000
Forecast [Member] | Rebranding Plan [Member]
Goodwill And Intangible Assets [Line Items]
Impairment of intangible assets				10,000,000	12,000,000
Trademarks [Member]
Goodwill And Intangible Assets [Line Items]
Impairment of indefinite lived intangible assets						700,000
Brand Names [Member]
Goodwill And Intangible Assets [Line Items]
Intangible assets, net	$12,000,000

Goodwill_and_Intangible_Assets3

Goodwill and Intangible Assets - Summary of Changes in Carrying Amount of Goodwill (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014
Goodwill [Line Items]
Goodwill, balance as of December 31, 2013	$356,811
Impairment of MBS Dev Goodwill	-9,034
MBS Dev divestiture	-4,599
Currency translation adjustment	-758
Goodwill, balance as of December 31, 2014	398,042
CPO [Member]
Goodwill [Line Items]
Acquisition	25,108
Goodwill, balance as of December 31, 2014	25,108
MEDCO [Member]
Goodwill [Line Items]
Acquisition	30,514
Goodwill, balance as of December 31, 2014	$30,514

Goodwill_and_Intangible_Assets4

Goodwill and Intangible Assets - Summary of Intangible Assets of Company by Major Class (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Finite Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, Gross Carrying Amount	$144,861	$92,060
Intangible assets subject to amortization, Accumulated Amortization	-45,203	-38,858
Intangible assets subject to amortization, Net Carrying Amount	99,658	53,202
Intangible Assets, Gross Carrying Amount	157,161	104,360
Intangible Assets, Net Carrying Amount	111,958	65,502
Trademarks not subject to amortization [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets not subject to amortization, Gross Carrying Amount	12,300	12,300
Customer relationships and other intangibles [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, Gross Carrying Amount	125,761	84,470
Intangible assets subject to amortization, Accumulated Amortization	-41,123	-36,232
Intangible assets subject to amortization, Net Carrying Amount	84,638	48,238
Intangible assets subject to amortization, Weighted Average Useful Life (years)	16 years	17 years
Non-compete Agreements [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, Gross Carrying Amount	4,672	4,700
Intangible assets subject to amortization, Accumulated Amortization	-2,364	-1,952
Intangible assets subject to amortization, Net Carrying Amount	2,308	2,748
Intangible assets subject to amortization, Weighted Average Useful Life (years)	4 years	4 years
Trademarks [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, Gross Carrying Amount	14,428	2,890
Intangible assets subject to amortization, Accumulated Amortization	-1,716	-674
Intangible assets subject to amortization, Net Carrying Amount	$12,712	$2,216
Intangible assets subject to amortization, Weighted Average Useful Life (years)	13 years	5 years

Goodwill_and_Intangible_Assets5

Goodwill and Intangible Assets - Summary of Amortization Expense Expected to be Incurred Over Next Five Years on Intangible Assets (Detail) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Goodwill And Intangible Assets Disclosure [Abstract]
2015	$13,943
2016	13,360
2017	11,296
2018	7,521
2019	$5,749

Goodwill_and_Intangible_Assets6

Goodwill and Intangible Assets - Carrying Amounts by Major Classes of Assets and Liabilities (Detail) (Mexican subsidiary [Member], USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Mexican subsidiary [Member]
Current assets:
Cash and cash equivalents	$1,288
Accounts receivable, less allowance for doubtful accounts	9,355
Inventories	14,757
Other current assets	261
Total current assets	25,661
Property, plant and equipment, at cost
Fixtures and equipment	589
Capitalized software costs	109
Total property, plant and equipment	698
Less: accumulated depreciation and amortization	576
Net property, plant equipment	122
Goodwill	4,621
Other assets	658
Total assets	31,062
Current liabilities:
Accounts payable	5,242
Accrued liabilities	1,651
Total current liabilities	6,893
Other long-term liabilities	7
Total liabilities	$6,900

Severance_and_Restructuring_Ch1

Severance and Restructuring Charges - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2013	Mar. 31, 2012	Dec. 31, 2012	Dec. 31, 2014	Dec. 31, 2015	Mar. 31, 2015
Workforce Reduction And Facility Closure Program
Restructuring Cost and Reserve [Line Items]
Pre-tax charge	$14.40	$13
Accrued liabilities		4.4			0.2
Workforce Reduction And Facility Closure Program | Forecast [Member]
Restructuring Cost and Reserve [Line Items]
Estimated cost for period						9	7
Estimated cost for remaining quarter						2
Distribution Network Optimization and Cost Reduction Program [Member]
Restructuring Cost and Reserve [Line Items]
Pre-tax charge			6.2
Accrued liabilities		0.2			0
Reversal of severance charges				0.3
Facility Closure Cost [Member] | Workforce Reduction And Facility Closure Program
Restructuring Cost and Reserve [Line Items]
Pre-tax charge	1.2
Facility Closure Cost [Member] | Distribution Network Optimization and Cost Reduction Program [Member]
Restructuring Cost and Reserve [Line Items]
Pre-tax charge			2.6
Cash outlays associated with severance		0.6		2.1	0
Severance and Related Expenses [Member] | Workforce Reduction And Facility Closure Program
Restructuring Cost and Reserve [Line Items]
Pre-tax charge	13.2
Severance and Related Expenses [Member] | Distribution Network Optimization and Cost Reduction Program [Member]
Restructuring Cost and Reserve [Line Items]
Pre-tax charge			3.6
Cash outlays associated with severance		1.1		1.9	0.2
Severance and Restructuring Charges [Member] | Workforce Reduction And Facility Closure Program
Restructuring Cost and Reserve [Line Items]
Cash outlays associated with severance		8.6			3.9
Reversal of severance charges		$1.40			$0.30

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Loss - Change in Accumulated Other Comprehensive Income (Loss) (AOCI) by Component, Net of Tax (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income Loss [Line Items]
AOCI, balance as of December 31, 2013	($39,888)
Other comprehensive (loss) income before reclassifications	-25,725
Amounts reclassified from AOCI	2,822
Net other comprehensive (loss) income	-22,903	13,877	2,641
AOCI, balance as of December 31, 2014	-62,791	-39,888
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
AOCI, balance as of December 31, 2013	-6,661
Other comprehensive (loss) income before reclassifications	-5,262
Net other comprehensive (loss) income	-5,262
AOCI, balance as of December 31, 2014	-11,923
Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
AOCI, balance as of December 31, 2013	871
Other comprehensive (loss) income before reclassifications	-1,063
Amounts reclassified from AOCI	466
Net other comprehensive (loss) income	-597
AOCI, balance as of December 31, 2014	274
Defined Benefit Pension Plans [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
AOCI, balance as of December 31, 2013	-34,098
Other comprehensive (loss) income before reclassifications	-19,400
Amounts reclassified from AOCI	2,356
Net other comprehensive (loss) income	-17,044
AOCI, balance as of December 31, 2014	($51,142)

Accumulated_Other_Comprehensiv3

Accumulated Other Comprehensive Loss - Amounts Reclassified Out of AOCI into Income Statement (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Warehousing, marketing and administrative expenses									($592,050)	($580,428)	($573,693)
Tax provision									-75,285	-74,340	-65,805
Net of tax	25,841	38,169	33,331	21,857	34,125	40,501	34,670	13,874	119,198	123,170	111,830
Amount Reclassified From AOCI [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net of tax									2,822
Amount Reclassified From AOCI [Member] | Cash Flow Hedges [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax provision									-285
Net of tax									466
Amount Reclassified From AOCI [Member] | Defined Benefit Pension Plans [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Warehousing, marketing and administrative expenses									3,856
Tax provision									-1,500
Net of tax									2,356
Amount Reclassified From AOCI [Member] | Interest Rate Swap [Member] | Cash Flow Hedges [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense, net									$751

Earnings_Per_Share_Additional_

Earnings Per Share - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Feb. 28, 2015
Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share amount	500,000	500,000	500,000
Additional authorized repurchase amount	$42,400,000
Number of shares repurchased	1,255,705	1,684,365
Repurchase of common stock, value	50,591,000	62,056,000	69,908,000
Treasury stock reissued, shares	250,747	1,086,502	619,664
Subsequent Event
Earnings Per Share [Line Items]
Additional authorized repurchase amount				$100,000,000

Earnings_Per_Share_Schedule_of

Earnings Per Share - Schedule of Computation of Basic and Diluted Earnings Per Share (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share [Abstract]
Net income	$25,841	$38,169	$33,331	$21,857	$34,125	$40,501	$34,670	$13,874	$119,198	$123,170	$111,830
Denominator for basic earnings per share - weighted average shares									38,705	39,650	40,337
Effect of dilutive securities: Employee stock options and restricted units									425	586	654
Denominator for diluted earnings per share - Adjusted weighted average shares and the effect of dilutive securities									39,130	40,236	40,991
Net income per share - basic	$0.67	$0.99	$0.86	$0.56	$0.86	$1.03	$0.87	$0.35	$3.08	$3.11	$2.77
Net income per share - diluted	$0.67	$0.98	$0.85	$0.55	$0.85	$1.01	$0.86	$0.34	$3.05	$3.06	$2.73

Segment_Information_Additional

Segment Information - Additional Information (Detail) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
									Supplier
									Customer
Segment Reporting Information [Line Items]
Net sales	$1,333,082,000	$1,419,947,000	$1,320,037,000	$1,254,139,000	$1,223,638,000	$1,336,676,000	$1,274,494,000	$1,250,485,000	$5,327,205,000	$5,085,293,000	$5,080,106,000
Number of Operating Segments									5
Number of supplier accounted for more than specified purchases									0
Number of single customer accounted for more than specified sales									0
Supplier Concentration Risk [Member] | Cost of Goods, Total [Member] | Hewlett Packard [Member]
Segment Reporting Information [Line Items]
Percentage of consolidated net sales									16.00%
Customer Concentration Risk [Member] | Sales Revenue, Services, Net [Member] | WB Mason [Member]
Segment Reporting Information [Line Items]
Percentage of consolidated net sales									12.00%
MEXICO [Member]
Segment Reporting Information [Line Items]
Net sales									151,300,000	138,200,000	112,500,000
Long-lived assets	$42,500,000				$13,800,000				$42,500,000	$13,800,000	$13,100,000

Segment_Information_Schedule_o

Segment Information - Schedule of Net Sales by Product Category (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Net sales	$1,333,082	$1,419,947	$1,320,037	$1,254,139	$1,223,638	$1,336,676	$1,274,494	$1,250,485	$5,327,205	$5,085,293	$5,080,106
Janitorial and breakroom supplies [Member]
Segment Reporting Information [Line Items]
Net sales									1,448,528	1,336,182	1,281,806
Technology products [Member]
Segment Reporting Information [Line Items]
Net sales									1,437,721	1,462,756	1,558,568
Traditional office products [Member]
Segment Reporting Information [Line Items]
Net sales									1,331,797	1,314,456	1,373,399
Industrial supplies [Member]
Segment Reporting Information [Line Items]
Net sales									638,752	517,810	409,266
Office furniture [Member]
Segment Reporting Information [Line Items]
Net sales									309,003	311,403	323,390
Freight revenue [Member]
Segment Reporting Information [Line Items]
Net sales									121,933	105,567	99,319
Other [Member]
Segment Reporting Information [Line Items]
Net sales									$39,471	$37,119	$34,358

Debt_Schedule_of_LongTerm_Debt

Debt - Schedule of Long-Term Debt Components (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Debt Instrument [Line Items]
OKI Mortgage & Capital Lease	$0.90	$1.20
Total	713.9	533.7
2013 Credit Agreement [Member]
Debt Instrument [Line Items]
Credit Agreement	363	206.8
2013 Note Purchase Agreement [Member]
Debt Instrument [Line Items]
Note Purchase Agreement	150
2007 Note Purchase Agreement [Member]
Debt Instrument [Line Items]
Note Purchase Agreement		135
Secured Debt [Member] | Receivables Securitization Program [Member]
Debt Instrument [Line Items]
Credit Agreement	$200	$190.70

Debt_Additional_Information_De

Debt - Additional Information (Detail) (USD $)	12 Months Ended	3 Months Ended			12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013
	BasisPoint
Debt Instrument [Line Items]
Percentage of outstanding debt priced at variable interest rates	79.00%
Effective interest rate	1.90%
Percentage of debt unhedged	58.00%
Maximum basis-point change that would not affect annual interest expense	50
Effect of 50 basis point increase or decrease in annualized interest expense, on a pre-tax basis	$2,100,000
Maximum amount of financing upon amendment of program	200,000,000
Receivables sold to Investors	360,300,000				355,400,000
Basis spread on variable rate	1.30%
Senior Secured Notes [Member]
Debt Instrument [Line Items]
Senior Secured notes	135,000,000
Maturity date of debt instrument	15-Oct-14
2013 Note Purchase Agreement [Member]
Debt Instrument [Line Items]
Senior Secured notes	150,000,000
Maturity date of debt instrument	15-Jan-21
Basis spread on variable rate	3.75%
2013 Credit Agreement [Member]
Debt Instrument [Line Items]
Effective interest rate	3.66%
Credit agreement expiry date	6-Jul-18
Maximum borrowing capacity	700,000,000
Outstanding letters of credit	11,100,000				11,100,000
Potential maximum committed principal amount	1,050,000,000
LIBOR-based loans rates	1.25%
Alternate base rate loans rates	0.25%
Percentage of lenders fee on unutilized portion borrowing facility	3.75%	3.75%	4.00%	4.00%
2013 Credit Agreement [Member] | Minimum [Member]
Debt Instrument [Line Items]
LIBOR-based loans rates					1.00%
Alternate base rate loans rates					0.00%
Percentage of lenders fee on unutilized portion borrowing facility					0.15%
Leverage ratio	3
2013 Credit Agreement [Member] | Maximum [Member]
Debt Instrument [Line Items]
LIBOR-based loans rates					2.00%
Alternate base rate loans rates					1.00%
Percentage of lenders fee on unutilized portion borrowing facility					0.35%
Leverage ratio	3.5
Receivables Securitization Program [Member] | 2013 Credit Agreement [Member]
Debt Instrument [Line Items]
Outside indebtedness permitted under facility	200,000,000
Receivables Securitization Program [Member] | Secured Debt [Member] | USR [Member]
Debt Instrument [Line Items]
Credit facility	200,000,000				190,700,000
Unspecified [Member] | 2013 Credit Agreement [Member]
Debt Instrument [Line Items]
Outside indebtedness permitted under facility	300,000,000
Note Purchase Agreement Replacement [Member] | 2013 Credit Agreement [Member]
Debt Instrument [Line Items]
Outside indebtedness permitted under facility	$135,000,000

Debt_Schedule_of_Debt_Maturiti

Debt - Schedule of Debt Maturities (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Debt Disclosure [Abstract]
2015	$0.90
2018	563
Thereafter	150
Total	$713.90	$533.70

Leases_Contractual_Obligations2

Leases, Contractual Obligations and Contingencies - Schedule of Future Minimum Lease Payments under Operating Leases (Detail) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Leases [Abstract]
2015	$49,778
2016	42,854
2017	33,693
2018	25,676
2019	22,178
Thereafter	29,469
Total required lease payments	$203,648

Leases_Contractual_Obligations3

Leases, Contractual Obligations and Contingencies - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Leases [Abstract]
Operating lease expense	$45.10	$46.30	$48.50

Pension_Plans_and_Defined_Cont2

Pension Plans and Defined Contribution Plan - Additional Information (Detail) (USD $)	0 Months Ended	12 Months Ended
	Dec. 10, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation		$224,086,000	$183,069,000	$196,521,000
Benefit Obligation, Increase (Decrease)		8,600,000
Compensation increase rate		0.00%	0.00%	0.00%
Cash contribution to pension plans in next fiscal year	2,000,000
Company contributions		5,500,000	5,300,000	5,300,000
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Active associates in the pension plan		2,600
Accumulated benefit obligation		224,100,000	183,100,000
Estimated net actuarial loss that will be amortized from accumulated other comprehensive loss		5,800,000
Estimated prior service cost that will be amortized from accumulated other comprehensive loss		$300,000
Pension Plans [Member] | General Plan Assets [Member] | Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocations for plan assets		50.00%
Pension Plans [Member] | General Plan Assets [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocations for plan assets		26.00%
Pension Plans [Member] | General Plan Assets [Member] | Domestic Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocations for plan assets		14.00%
Pension Plans [Member] | General Plan Assets [Member] | Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocations for plan assets		10.00%
Pension Plans [Member] | Union Plan Assets [Member] | Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocations for plan assets		20.00%
Pension Plans [Member] | Union Plan Assets [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocations for plan assets		50.00%
Pension Plans [Member] | Union Plan Assets [Member] | Domestic Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocations for plan assets		20.00%
Pension Plans [Member] | Union Plan Assets [Member] | Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Target allocations for plan assets		10.00%

Pension_Plans_and_Defined_Cont3

Pension Plans and Defined Contribution Plan - Schedule of Reconciliation of Changes in Projected Benefit Obligation (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Compensation And Retirement Disclosure [Abstract]
Benefit obligation at beginning of year	$183,069	$196,521
Service cost—benefit earned during the period	1,069	1,479
Interest cost on projected benefit obligation	8,960	8,379
Union plan amendments	1,736
Actuarial (gain) loss	35,054	-16,373
Benefits paid	-5,802	-6,937
Benefit obligation at end of year	$224,086	$183,069

Pension_Plans_and_Defined_Cont4

Pension Plans and Defined Contribution Plan - Schedule of Change in Plan Assets (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of year	$162,250
Benefits paid	-5,802	-6,937
Fair value of plan assets at end of year	173,770	162,250
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of year	162,250	145,563
Actual return on plan assets	15,323	10,624
Company contributions	2,000	13,000
Benefits paid	-5,802	-6,937
Fair value of plan assets at end of year	$173,771	$162,250

Pension_Plans_and_Defined_Cont5

Pension Plans and Defined Contribution Plan - Schedule of Pension Plan Investment Allocations (Detail) (Pension Plans [Member])	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, asset allocations	100.00%	100.00%
Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, asset allocations	1.10%	1.20%
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, asset allocations	29.60%	29.20%
Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, asset allocations	45.40%	42.50%
Real Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, asset allocations	13.60%	16.60%
Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, asset allocations	10.30%	10.50%

Pension_Plans_and_Defined_Cont6

Pension Plans and Defined Contribution Plan - Schedule of Fair Values of Pension Plan Assets (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Defined Benefit Plan Disclosure [Line Items]
Total Fair value of plan assets	$173,770	$162,250
Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair value of plan assets	1,831	1,888
U.S. Large Cap [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair value of plan assets	18,612	17,380
International Large Core [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair value of plan assets		7,650
International Large Value [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair value of plan assets	16,791	7,598
Emerging Markets [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair value of plan assets	9,653	8,502
U.S. Small Value Fund [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair value of plan assets	5,274	5,058
U.S. Small Growth Fund [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair value of plan assets	1,123	1,211
U.S. Fixed Income [Member] | Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair value of plan assets	78,886	69,070
Domestic Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair value of plan assets	13,870	11,638
Commodities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair value of plan assets	9,789	15,246
Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair value of plan assets	17,941	17,009
Quoted Prices in Active Markets for Identical Assets or Liabilities Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair value of plan assets	155,829	145,241
Quoted Prices in Active Markets for Identical Assets or Liabilities Level 1 [Member] | Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair value of plan assets	1,831	1,888
Quoted Prices in Active Markets for Identical Assets or Liabilities Level 1 [Member] | U.S. Large Cap [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair value of plan assets	18,612	17,380
Quoted Prices in Active Markets for Identical Assets or Liabilities Level 1 [Member] | International Large Core [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair value of plan assets		7,650
Quoted Prices in Active Markets for Identical Assets or Liabilities Level 1 [Member] | International Large Value [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair value of plan assets	16,791	7,598
Quoted Prices in Active Markets for Identical Assets or Liabilities Level 1 [Member] | Emerging Markets [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair value of plan assets	9,653	8,502
Quoted Prices in Active Markets for Identical Assets or Liabilities Level 1 [Member] | U.S. Small Value Fund [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair value of plan assets	5,274	5,058
Quoted Prices in Active Markets for Identical Assets or Liabilities Level 1 [Member] | U.S. Small Growth Fund [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair value of plan assets	1,123	1,211
Quoted Prices in Active Markets for Identical Assets or Liabilities Level 1 [Member] | U.S. Fixed Income [Member] | Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair value of plan assets	78,886	69,070
Quoted Prices in Active Markets for Identical Assets or Liabilities Level 1 [Member] | Domestic Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair value of plan assets	13,870	11,638
Quoted Prices in Active Markets for Identical Assets or Liabilities Level 1 [Member] | Commodities [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair value of plan assets	9,789	15,246
Significant Other Observable Inputs Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair value of plan assets	17,941	17,009
Significant Other Observable Inputs Level 2 [Member] | Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Fair value of plan assets	$17,941	$17,009

Pension_Plans_and_Defined_Cont7

Pension Plans and Defined Contribution Plan - Schedule of Fair Values of Pension Plan Assets (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2014
Compensation And Retirement Disclosure [Abstract]
Minimum investment for funding in assets	98.00%

Pension_Plans_and_Defined_Cont8

Pension Plans and Defined Contribution Plan - Schedule of Plan Funded Status (Detail) (Pension Plans [Member], USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Funded status of the plan	($50,316)	($20,820)
Unrecognized prior service cost	3,166	1,613
Unrecognized net actuarial loss	79,502	53,158
Net amount recognized	$32,352	$33,951

Pension_Plans_and_Defined_Cont9

Pension Plans and Defined Contribution Plan - Schedule of Amounts Recognized in Consolidated Balance Sheets (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Defined Benefit Plan Disclosure [Line Items]
Accrued benefit liability	($50,316)	($20,820)
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accrued benefit liability	-50,316	-20,820
Accumulated other comprehensive income	82,668	54,771
Net amount recognized	$32,352	$33,951

Recovered_Sheet1

Pension Plans and Defined Contribution Plan - Schedule of Components of Net Periodic Benefit Cost (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Service cost—benefit earned during the period	$1,069	$1,479
Interest cost on projected benefit obligation	8,960	8,379
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost—benefit earned during the period	1,069	1,479	962
Interest cost on projected benefit obligation	8,960	8,379	8,417
Expected return on plan assets	-10,286	-11,338	-10,005
Amortization of prior service cost	182	192	176
Amortization of actuarial loss	3,674	5,741	6,194
Net periodic pension cost	$3,599	$4,453	$5,744

Recovered_Sheet2

Pension Plans and Defined Contribution Plan - Schedule of Actuarial Assumptions for Discount Rates, Expected Long-Term Rates of Return on Plan Assets, and Rates of Increase in Compensation and Healthcare Costs (Detail) (Pension Plans [Member])	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
General Plan Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumed discount rate	4.09%	4.95%	4.30%
Expected long-term rate of return on plan assets	6.30%	7.30%	7.75%
Union Plan Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Assumed discount rate	4.16%	5.10%	4.45%
Expected long-term rate of return on plan assets	7.30%	7.75%	7.75%

Recovered_Sheet3

Pension Plans and Defined Contribution Plan - Schedule of Estimated Future Benefit Payments (Detail) (Pension Plans [Member], USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
2015	$6,130
2016	7,376
2017	7,951
2018	8,117
2019	9,165
2020-2024	$55,313

Preferred_Stock_Additional_Inf

Preferred Stock - Additional Information (Detail)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Equity [Abstract]
Preferred stock, shares authorized	15
Preferred stock outstanding	0	0

Income_Taxes_Schedule_of_Provi

Income Taxes - Schedule of Provision for Income Taxes (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Currently Payable, Federal	$73,319	$70,234	$65,835
Currently Payable, State	8,333	8,027	6,683
Total currently payable	81,652	78,261	72,518
Deferred, net-Federal	-5,736	-3,891	-5,790
Deferred, net-State	-631	-30	-923
Total deferred, net	-6,367	-3,921	-6,713
Provision for income taxes	$75,285	$74,340	$65,805

Income_Taxes_Schedule_of_Effec

Income Taxes - Schedule of Effective Income Tax Rates Varied from Statutory Federal Income Tax Rate (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Tax provision based on the federal statutory rate, Amount	$68,070	$69,128	$62,172
State and local income taxes—net of federal income tax benefit, Amount	4,816	5,292	3,464
Change in tax reserves and accrual adjustments, Amount	-115	-69	-521
Non-deductible and other, Amount	2,514	-11	690
Provision for income taxes	$75,285	$74,340	$65,805
% of Pre-tax Income of Tax provision based on the federal statutory rate	35.00%	35.00%	35.00%
% of Pre-tax Income of State and local income taxes-net of federal income tax benefit	2.50%	2.60%	2.00%
% of Pre-tax Income of Change in tax reserves and accrual adjustments	-0.10%	0.00%	-0.40%
% of Pre-tax Income of Non-deductible and other	1.30%	0.00%	0.40%
% of Pre-tax Income of Provision for income taxes	38.70%	37.60%	37.00%

Income_Taxes_Schedule_of_Defer

Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Income Tax Disclosure [Abstract]
Assets, Accrued expenses	$12,299	$14,615
Assets, Allowance for doubtful accounts	7,452	7,815
Assets, Pension and post-retirement	18,797	7,319
Assets, Share-based compensation	5,653	5,750
Assets, Income tax credits, capital losses, and net operating losses	12,550	5,539
Assets, Restructuring costs	273	1,930
Assets, Other	819	376
Total Deferred	57,843	43,344
Valuation Allowance	-7,397	-2,791
Net Deferred, Assets	50,446	40,553
Liabilities, Depreciation and amortization	26,816	28,282
Liabilities, Intangibles arising from acquisitions	22,184	23,689
Liabilities, Inventory reserves and adjustments	28,092	28,783
Liabilities, Interest rate swap	211	591
Total Deferred	77,303	81,345
Net Deferred Liabilities	$77,303	$81,345

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Taxes [Line Items]
Net operating losses carry forward expiration date	31-Dec-33
Capital loss carryforwards	$10,200,000
Capital loss carryforwards, expiration year	2019
Gross unrecognized tax benefits	3,205,000	3,108,000	3,134,000	3,374,000
Unrecognized tax benefits that would impact effective tax rate	2,100,000	2,000,000	2,000,000
Gross amount of interest and penalties	0	0	100,000
Accrued for potential payment of interest and penalties	600,000	600,000
Gross unrecognized tax benefit change in next 12 months, minimum	0
Gross unrecognized tax benefit change in next 12 months, maximum	1,000,000
State and Local Jurisdiction [Member]
Income Taxes [Line Items]
State tax credits carry forward expiration date	31-Dec-19
Tax credit carryforwards	9,100,000
Tax credit carryforwards, expiration year	2019
Net operating loss carryforwards	$900,000
Net operating loss carryforwards, expiration year	2033

Income_Taxes_Schedule_of_Unrec

Income Taxes - Schedule of Unrecognized Tax Benefits (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Beginning Balance, January 1	$3,108	$3,134	$3,374
Additions based on tax positions taken during a prior period	123	169	308
Reductions based on tax positions taken during a prior period	-11	-5	-11
Additions based on tax positions taken during the current period	382	389	451
Reductions related to settlement of tax matters	-70	-184	-490
Reductions related to lapses of applicable statutes of limitation	-327	-395	-498
Ending Balance, December 31	$3,205	$3,108	$3,134

Supplemental_Cash_Flow_Informa2

Supplemental Cash Flow Information - Schedule of Supplemental Disclosures of Cash Flow Information (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Supplemental Cash Flow Information [Abstract]
Interest	$12,822	$12,385	$22,563
Income taxes, net	$76,205	$79,526	$53,053

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments - Schedule of Estimated Fair Value of Financial Instruments (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Convertible note receivable	$6,775
Non-convertible note receivable	2,800
Long-term interest rate swap liability	253
Long-term interest rate swap asset		599
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	20,812	22,326
Accounts receivable, net	702,527	643,379
Convertible note receivable	6,775
Non-convertible note receivable	2,800
Accounts payable	485,241	476,113
Debt	713,909	533,697
Long-term interest rate swap liability	253
Long-term interest rate swap asset		599
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	20,812	22,326
Accounts receivable, net	702,527	643,379
Convertible note receivable	6,775
Non-convertible note receivable	2,800
Accounts payable	485,241	476,113
Debt	713,909	533,697
Long-term interest rate swap liability	253
Long-term interest rate swap asset		$599

Other_Assets_and_Liabilities_S

Other Assets and Liabilities - Schedule of Other Assets and Liabilities (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Other Long-Term Assets, net:
Investment in deferred compensation	$4,984	$4,408
Long-term prepaid assets	19,055	14,063
Long-term convertible and non-convertible notes receivable	9,575
Capitalized financing costs	3,141	3,391
Long-term interest rate swap asset		599
Long-term income tax asset	2,881
Other	2,174	3,115
Total other long-term assets, net	41,810	25,576
Other Long-Term Liabilities:
Accrued pension obligation	50,316	20,820
Deferred rent	16,241	18,654
Deferred directors compensation	5,016	4,412
Long-term interest rate swap liability	253
Long-term income tax liability	3,639	3,482
Long-term merger expenses	17,229	198
Long-term workers compensation liability	7,155	6,876
Other	4,545	5,345
Total other long-term liabilities	$104,394	$59,787

Derivative_Financial_Instrumen2

Derivative Financial Instruments - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014
Derivative [Line Items]
Number of swap transactions	5
Outstanding debt percentage	42.00%
Minimum debt default amount	$25,000,000
Fair value	300,000
2013 Termination of June 2013 Swap Transaction [Member]
Derivative [Line Items]
Gain realized by the company	900,000
Swap transaction gain reclassified during the period	100,000
Swap transaction gain to be reclassified during next 12 months	$100,000
July 2012 Swap Transaction [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative contract period	3 years
July 2012 Swap Transaction [Member] | Forward Contracts [Member]
Derivative [Line Items]
Derivative contract period	2 years
June 2013 Swap Transaction [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative contract period	7 years
June 2013 Swap Transaction [Member] | Forward Contracts [Member]
Derivative [Line Items]
Derivative contract period	7 months

Derivative_Financial_Instrumen3

Derivative Financial Instruments - Schedule of Interest Rate Swap Agreements, Cash Flow Hedge (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Derivative [Line Items]
Fair Value Net Liability	$253
Fair Value Net Asset		599
July 2012 Swap Transaction [Member]
Derivative [Line Items]
Notional Amount	150,000	150,000
Receive	Floating 1-month LIBOR	Floating 1-month LIBOR
Pay	1.05%	1.05%
Maturity Date	18-Jul-17	18-Jul-17
Fair Value Net Liability	253
Fair Value Net Asset		$599

Derivative_Financial_Instrumen4

Derivative Financial Instruments - Schedule of Effect of Derivative Instruments on Income Statement (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
November 2007 Swap Transaction [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion)		($77)
November 2007 Swap Transaction [Member] | Interest expense, net [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)		-228
July 2012 Swap Transaction [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion)	105	864
July 2012 Swap Transaction [Member] | Interest expense, net [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	625
June 2013 Swap Transaction [Member]
Derivative Instruments Gain Loss [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion)		$569

Fair_Value_Measurements_Schedu

Fair Value Measurements - Schedule of Financial Instruments Measured at Fair Value (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Convertible note receivable	$6,775
Non-convertible note receivable	2,800
Long-term interest rate swap liability	253
Total	9,828
Long-term interest rate swap asset		599
Significant Other Observable Inputs Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term interest rate swap liability	253
Total	253
Long-term interest rate swap asset		599
Significant Unobservable Inputs Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Convertible note receivable	6,775
Non-convertible note receivable	2,800
Total	$9,575

Fair_Value_Measurements_Additi

Fair Value Measurements - Additional Information (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value Disclosures [Abstract]
Carrying amount of accounts receivable under Current Receivables Securitization Program, which also approximates fair value	$360.30	$355.40
Assets measured at fair value on a nonrecurring basis	0
Liabilities measured at fair value on a nonrecurring basis	$0

Quarterly_Financial_DataUnaudi2

Quarterly Financial Data-Unaudited - Schedule of Quarterly Financial Data (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
Net sales	$1,333,082	$1,419,947	$1,320,037	$1,254,139	$1,223,638	$1,336,676	$1,274,494	$1,250,485	$5,327,205	$5,085,293	$5,080,106
Gross profit	212,930	211,028	199,460	187,083	195,456	203,661	201,936	188,525	810,501	789,578	774,604
Net income	$25,841	$38,169	$33,331	$21,857	$34,125	$40,501	$34,670	$13,874	$119,198	$123,170	$111,830
Net income per share - basic	$0.67	$0.99	$0.86	$0.56	$0.86	$1.03	$0.87	$0.35	$3.08	$3.11	$2.77
Net income per share - diluted	$0.67	$0.98	$0.85	$0.55	$0.85	$1.01	$0.86	$0.34	$3.05	$3.06	$2.73

Quarterly_Financial_DataUnaudi3

Quarterly Financial Data-Unaudited - Schedule of Quarterly Financial Data (Parenthetical) (Detail) (USD $)	12 Months Ended		3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
Schedule Of Quarterly Financial Data [Line Items]
Loss on disposition of MBS Dev	$8,234,000
Asset impairment charge		1,183,000
MBS Dev, Inc [Member]
Schedule Of Quarterly Financial Data [Line Items]
Loss on disposition of MBS Dev			8,200,000
Loss on disposition of business, impact on diluted earnings per share			$0.21
Workforce Reduction And Facility Closure Program
Schedule Of Quarterly Financial Data [Line Items]
Severance and Restructuring Charges		13,000,000			14,400,000
Restructuring activities impact on diluted earnings per share		$0.20
Asset impairment charge				$1,200,000
Workforce Reduction And Facility Closure Program | Asset Impairment [Member]
Schedule Of Quarterly Financial Data [Line Items]
Restructuring activities impact on diluted earnings per share				$0.03

Valuation_and_Qualifying_Accou

Valuation and Qualifying Accounts (Detail) (Allowance for Doubtful Accounts [Member], USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Allowance for Doubtful Accounts [Member]
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$20,608	$22,716	$28,323
Additions Charged to Costs and Expenses	4,898	4,888	5,232
Deductions	-5,781	-6,504	-8,490
Reclassifications		-492	-2,349
Balance at End of Period	$19,725	$20,608	$22,716