Catamaran 10-Q 2 May 14 2014 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2014	Apr. 30, 2014
Document Information [Line Items]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	31-Mar-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q1	'
Trading Symbol	'CTRX	'
Entity Registrant Name	'Catamaran Corp.	'
Entity Central Index Key	'0001363851	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	206,855,099

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets	'	'
Cash and cash equivalents	$684,715	$387,241
Restricted cash	32,222	32,220
Accounts receivable, net of allowance for doubtful accounts of $5,061 (2013 — $5,860)	1,131,425	959,586
Rebates receivable	668,053	305,955
Other current assets	152,790	152,673
Total current assets	2,669,205	1,837,675
Property and equipment, net of accumulated depreciation of $117,426 (2013 — $103,858)	191,304	197,007
Goodwill	4,722,555	4,720,275
Other intangible assets, net of accumulated amortization of $416,269 (2013 — $363,546)	1,126,433	1,181,419
Other long-term assets	84,976	59,387
Total assets	8,794,473	7,995,763
Current liabilities	'	'
Accounts payable	962,039	817,805
Accrued expenses and other current liabilities	295,545	254,100
Rebates payable	718,900	356,265
Current portion - long-term debt	56,250	50,000
Total current liabilities	2,032,734	1,478,170
Deferred income taxes	291,361	301,341
Long-term debt	1,396,661	1,215,363
Other long-term liabilities	86,930	89,391
Total liabilities	3,807,686	3,084,265
Commitments and contingencies (Note 10)	'	'
Shareholders’ equity	'	'
Common shares: no par value, unlimited shares authorized; 206,854,499 shares issued and outstanding at March 31, 2014 (December 31, 2013 — 206,305,070 shares)	4,238,684	4,215,291
Additional paid-in capital	67,484	77,790
Retained earnings	680,606	617,161
Accumulated other comprehensive loss	-1,895	-1,752
Total shareholders' equity	4,984,879	4,908,490
Non-controlling interest	1,908	3,008
Total equity	4,986,787	4,911,498
Total liabilities and equity	$8,794,473	$7,995,763

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parentheticals) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]	'	'
Accounts receivable, allowance for doubtful accounts	$5,061	$5,860
Property and equipment, accumulated depreciation	117,426	103,858
Other intangible assets, accumulated amortization	$416,269	$363,546
Common stock, par value (in dollars per share)	$0	$0
Common stock issued (in shares)	206,854,499	206,305,070
Common stock outstanding (in shares)	206,854,499	206,305,070

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Income Statement [Abstract]	'	'
Revenue	$4,914,479	$3,219,716
Cost of revenue	4,599,817	2,971,344
Gross profit	314,662	248,372
Expenses:	'	'
Selling, general and administrative	130,519	100,495
Depreciation of property and equipment	12,368	6,970
Amortization of intangible assets	54,986	50,056
Total operating expenses	197,873	157,521
Operating income	116,789	90,851
Interest and other expense, net	11,336	11,039
Income before income taxes	105,453	79,812
Income tax expense (benefit):	'	'
Current	40,442	39,680
Deferred	-12,334	-16,652
Total income tax expense (benefit)	28,108	23,028
Net income	77,345	56,784
Less: Net income attributable to non-controlling interest	13,900	5,376
Net income attributable to the Company	$63,445	$51,408
Earnings per share attributable to the Company:	'	'
Basic (in dollars per share)	$0.31	$0.25
Diluted (in dollars per share)	$0.31	$0.25
Weighted average number of shares used in computing earnings per share:	'	'
Basic (in shares)	206,525,188	205,576,875
Diluted (in shares)	207,086,677	206,423,549

Consolidated_Statement_of_Comp

Consolidated Statement of Comprehensive Income (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Consolidated Statements of Comprehensive Income [Abstract]	'	'
Net income	$77,345	$56,784
Other comprehensive income, net of tax	'	'
Unrealized income on cash flow hedge	143	261
Comprehensive income	77,488	57,045
Less: Comprehensive income attributable to non-controlling interest	13,900	5,376
Comprehensive income attributable to the Company	$63,588	$51,669

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities:	'	'
Net income	$77,345	$56,784
Items not involving cash:	'	'
Stock-based compensation	6,828	6,644
Depreciation of property and equipment	13,359	8,103
Amortization of intangible assets	54,986	50,056
Deferred lease inducements and rent	-77	14,528
Deferred income taxes	-12,334	-16,652
Tax benefit on option exercises	-2,692	-4,928
Deferred financing cost amortization	2,188	2,493
Changes in operating assets and liabilities, net of effects from acquisitions:	'	'
Accounts receivable	-171,907	-1,664
Rebates receivable	-362,352	-14,553
Restricted cash	-2	227
Other current assets	26,312	12,467
Accounts payable	144,264	-34,136
Accrued expenses and other current liabilities	20,753	-10,154
Rebates payable	362,635	-8,674
Other long-term assets and liabilities	-23,630	2,764
Net cash provided by operating activities	135,676	63,305
Cash flows from investing activities:	'	'
Acquisition, net of cash acquired	-2,026	0
Purchases of property and equipment	-12,782	-25,243
Proceeds from restricted cash	0	20,004
Net cash used by investing activities	-14,808	-5,239
Cash flows from financing activities:	'	'
Proceeds from issuance of debt	492,500	0
Repayment of long-term debt	-306,250	-100,000
Payment of financing costs	-955	0
Proceeds from exercise of options	3,567	785
Tax benefit on option exercises	2,692	4,928
Payments of contingent consideration	0	-23,203
Distributions to non-controlling interest	-15,000	0
Net cash provided (used) by financing activities	176,554	-117,490
Effect of foreign exchange on cash balances	52	4
Increase (decrease) in cash and cash equivalents	297,474	-59,420
Cash and cash equivalents, beginning of period	387,241	370,776
Cash and cash equivalents, end of period	$684,715	$311,356

Consolidated_Statements_of_Equ

Consolidated Statements of Equity (USD $)	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income	Noncontrolling Interest
In Thousands, except Share data, unless otherwise specified
Beginning balance, amount at Dec. 31, 2012	$4,609,861	$4,180,778	$73,530	$354,991	($2,191)	$2,753
Beginning balance, shares at Dec. 31, 2012	'	205,399,102	'	'	'	'
Activities during the period (unaudited) [Roll Forward]	'	'	'	'	'	'
Net income	56,784	'	'	51,408	'	5,376
Exercise of stock options, shares	'	133,264	'	'	'	'
Exercise of stock options, amount	785	1,125	-340	'	'	'
Vesting of restricted stock units, shares	'	373,018	'	'	'	'
Vesting of restricted stock units, amount	0	20,898	-20,898	'	'	'
Tax benefit on options exercised	4,928	'	4,928	'	'	'
Stock-based compensation	6,644	'	6,644	'	'	'
Distribution declared to non-controlling interest	2,114	'	'	'	'	2,114
Other comprehensive income, net of tax	261	'	'	'	261	'
Ending balance, amount at Mar. 31, 2013	4,677,149	4,202,801	63,864	406,399	-1,930	6,015
Ending balance, shares at Mar. 31, 2013	'	205,905,384	'	'	'	'
Beginning balance, amount at Dec. 31, 2013	4,911,498	4,215,291	77,790	617,161	-1,752	3,008
Beginning balance, shares at Dec. 31, 2013	206,305,070	206,305,070	'	'	'	'
Activities during the period (unaudited) [Roll Forward]	'	'	'	'	'	'
Net income	77,345	'	'	63,445	'	13,900
Exercise of stock options, shares	'	139,800	'	'	'	'
Exercise of stock options, amount	3,567	5,070	-1,503	'	'	'
Warrants exercised, shares	'	0	'	'	'	'
Warrants exercised, amount	0	0	0	'	'	'
Vesting of restricted stock units, shares	'	409,629	'	'	'	'
Vesting of restricted stock units, amount	0	18,323	-18,323	'	'	'
Tax benefit on options exercised	2,692	'	2,692	'	'	'
Stock-based compensation	6,828	'	6,828	'	'	'
Distributions to non-controlling interest	-15,000	'	'	'	'	-15,000
Other comprehensive income, net of tax	-143	'	'	'	-143	'
Ending balance, amount at Mar. 31, 2014	$4,986,787	$4,238,684	$67,484	$680,606	($1,895)	$1,908
Ending balance, shares at Mar. 31, 2014	206,854,499	206,854,499	'	'	'	'

Description_of_Business

Description of Business	3 Months Ended
	Mar. 31, 2014
Description of Business [Abstract]	'
Description of Business	'
	Description of Business
	Catamaran Corporation (“Catamaran” or the “Company”) is a leading provider of pharmacy benefits management (“PBM”) services and healthcare information technology (“HCIT”) solutions to the healthcare benefits management industry. The Company’s product offerings and solutions combine a wide range of PBM services, software applications, application service provider (“ASP”) processing services and professional services designed for many of the largest organizations in the pharmaceutical supply chain, such as federal, provincial, state and local governments, unions, corporations, pharmacy benefit managers, managed care organizations, retail pharmacy chains and other healthcare intermediaries. The Company is headquartered in Schaumburg, Illinois with several locations in the U.S. and Canada. The Company trades on the Toronto Stock Exchange under ticker symbol “CCT” and on the Nasdaq Global Select Market under ticker symbol “CTRX.”

Basis_of_Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2014
Basis of Presentation [Abstract]	'
Basis of Presentation	'
	Basis of Presentation
	Basis of presentation:
	The unaudited consolidated financial statements of the Company have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”), pursuant to the Securities and Exchange Commission’s (“SEC”) rules and regulations for reporting on Form 10-Q, and following accounting policies consistent with the Company’s audited annual consolidated financial statements for the year ended December 31, 2013. The unaudited consolidated financial statements of the Company include its wholly-owned subsidiaries and all significant intercompany transactions and balances have been eliminated in consolidation. Amounts in the unaudited consolidated financial statements and notes thereto are expressed in U.S. dollars, except where indicated. The financial information included herein reflects all adjustments (consisting only of normal recurring adjustments), which, in the opinion of management, are necessary for a fair presentation of the results for the periods presented. Certain reclassifications have been made to conform the prior year's consolidated financial statements to the current year's presentation. The results of operations for the three-month period ended March 31, 2014 are not necessarily indicative of the results to be expected for the full year ending December 31, 2014. As of the issuance date of the Company’s financial statements, the Company has assessed whether subsequent events have occurred that require adjustment to or disclosure in these unaudited consolidated financial statements in accordance with Financial Accounting Standards Board’s (“FASB”) guidance.
	Pursuant to the SEC rules and regulations for reporting on Form 10-Q, certain information and note disclosures normally included in the annual consolidated financial statements prepared in accordance with GAAP have been condensed or excluded. As a result, these unaudited consolidated financial statements do not contain all the disclosures required to be included in the annual consolidated financial statements and should be read in conjunction with the most recent audited annual consolidated financial statements and notes thereto described in our Annual Report on Form 10-K for the year ended December 31, 2013.
	Use of estimates:
	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the period. Significant items subject to such estimates and assumptions include revenue recognition, rebates, purchase price allocation and contingent consideration in connection with acquisitions, valuation of property and equipment, valuation of intangible assets acquired and related amortization periods, impairment of goodwill, income tax uncertainties, contingencies and valuation allowances for receivables and income taxes. Actual results could differ from those estimates.

Recent_Accounting_Pronouncemen

Recent Accounting Pronouncements	3 Months Ended
	Mar. 31, 2014
Recent Accounting Pronouncements [Abstract]	'
Recent Accounting Pronouncements	'
	Recent Accounting Pronouncements
	a) Recent accounting standards implemented
	In July 2013, the FASB issued authoritative guidance containing changes to the presentation of an unrecognized tax benefit when a loss or credit carryforward exists. The new standard requires the netting of unrecognized tax benefits against a deferred tax asset for a loss or other carryforward that would apply in the settlement of the uncertain tax positions. The Company adopted this standard on January 1, 2014; however, the implementation of the standard did not have a significant impact on its financial results or in the presentation and disclosure of its financial statements.
	No other new accounting standards have been adopted during the three-month period ended March 31, 2014.
	b) Recent accounting standards issued
	No new standards have been issued during the three-month period ended March 31, 2014 that the Company assessed to have a significant impact on its financial results or in the presentation and disclosure of its financial statements.

Business_Combinations

Business Combinations	3 Months Ended
	Mar. 31, 2014
Business Combinations [Abstract]	'
Business Combinations	'
	Business Combinations
	Restat Acquisition
	On October 1, 2013, the Company completed the acquisition of Restat, LLC ("Restat"), a privately held pharmacy benefit manager based in Milwaukee, Wisconsin, for a purchase price of $409.5 million in cash subject to certain customary post-closing adjustments. The purchase price was funded from Catamaran’s existing cash balance and $350.0 million in borrowings under a five-year senior secured revolving credit facility (the “Revolving Facility”). The acquisition provides the Company the opportunity to bring Catamaran's full-suite of technology and clinical services to Restat's clients, including mail and specialty pharmacy services. The results of Restat have been included in the Company's results since October 1, 2013.
	The acquisition was accounted for under the acquisition method of accounting with the Company treated as the acquiring entity. Accordingly, the consideration paid by the Company to complete the acquisition has been recorded to the assets acquired and liabilities assumed based upon their estimated fair values as of the date of acquisition. The carrying values for current assets and liabilities were deemed to approximate their fair values due to the short-term nature of their maturities. Fair values for acquired amortizable intangible assets were determined as follows: customer relationships were valued using an excess earnings model based on expected future revenues derived from the customers acquired, non-compete agreements were valued using discounted cash flow models based on expected future results of Restat and trademarks/tradenames were valued using a royalty savings model based on future projected revenues of Restat. The excess of the purchase price over the estimated fair values of the net assets acquired was recorded as goodwill.
	All of the assets and liabilities recorded for the acquisition are included within the Company's PBM segment. The residual amount of the purchase price after preliminary allocation to identifiable net assets represents goodwill. Goodwill is non-amortizing for financial statement purposes. Goodwill of $225.8 million related to the Restat acquisition is tax deductible. The goodwill recognized by the Company represents many of the synergies and business growth opportunities that the Company anticipates may be realized from the acquisition of Restat. The synergies include improved pricing from the Company's suppliers due to the increased volume of prescription drug purchases, pull through opportunities of the Company's mail and specialty service offerings, and a more efficient leveraging of resources to achieve operating profits.
	The following summarizes the preliminary fair values assigned to the assets acquired and liabilities assumed at the acquisition date and are subject to change as the valuation processes for intangible assets, rebates, and pharmacy related receivables and payables are not complete. Final determination of the fair values may result in further adjustments to the amounts presented below (in thousands):
		Initial Amounts Recognized at Acquisition Date (a)		Measurement Period Adjustments (b)			Current Amounts Recognized at Acquisition Date
	Accounts receivable	$	13,842	$	—		$	13,842
	Rebates receivable	6,635		(254		)	6,381
	Other current assets	383		—			383
	Total current assets	20,860		(254		)	20,606
	Property and equipment	1,263		—			1,263
	Intangible assets	182,720		—			182,720
	Goodwill	223,474		2,280			225,754
	Total assets acquired	428,317		2,026			430,343
	Accounts payable	22,370		—			22,370
	Rebates payable	16,106		—			16,106
	Accrued liabilities	7,231		—			7,231
	Total liabilities assumed	45,707		—			45,707
	Net assets acquired	$	382,610	$	2,026		$	384,636
	(a) As previously reported in the Company's Form 10-K for the period ended December 31, 2013.
	(b) These measurement period adjustments reflect an additional $2.0 million paid to former Restat owners for working capital reconciliation as well as changes in the estimated fair values of the associated assets acquired and liabilities assumed.
	During the three-month period ended March 31, 2014, the Company recognized $8.7 million, of amortization expense from intangible assets acquired in the Restat acquisition. Amortization associated with the Restat acquisition for the remainder of 2014 is expected to be $25.0 million.
	The estimated fair values and useful lives of intangible assets acquired are as follows (dollars in thousands):
		Fair Value		Useful Life
	Customer relationships - PBM	$	143,200	10 years
	Customer relationships - cash card	35,500		3 years
	Trademarks/Trade names	1,000		1 year
	Non-compete agreements	3,020		5 years
	Total	$	182,720
	None of the acquired intangible assets will have any residual value at the end of the amortization periods. There were no in-process research and development assets acquired.
	Unaudited Pro Forma Financial Information
	The following unaudited pro forma financial information presents the combined historical results of operations of the Company and its acquisition of Restat as if the acquisition had occurred on the first day of the fiscal year prior to the fiscal year when the acquisition was completed. The unaudited pro forma financial information includes certain adjustments related to the acquisition, such as increased amortization from the fair value of intangible assets acquired recorded as part of the purchase accounting, the elimination of transactions between the Company and the acquired entities, and related income tax effects.
	Unaudited pro forma results of operations are as follows (in thousands, except share and per share amounts):
		Three Months Ended March 31, 2013
	Revenue	$	3,414,064
	Gross profit	$	265,572
	Net income attributable to the Company	$	56,642
	Earnings per share attributable to the Company:
	Basic	$	0.28
	Diluted	$	0.27
	Weighted average shares outstanding:
	Basic	205,576,875
	Diluted	206,423,549
	This unaudited pro forma financial information is not intended to represent or be indicative of what would have occurred if these transactions had taken place on the date presented and is not indicative of what the Company's actual results of operations would have been had the acquisitions been completed at the beginning of the period indicated above. Further, the pro forma combined results do not reflect one-time costs to fully integrate and operate the combined organization more efficiently or anticipated synergies expected to result from the combinations and should not be relied upon as being indicative of the future results that the Company will experience.

Goodwill_and_Other_Intangible_

Goodwill and Other Intangible Assets	3 Months Ended
	Mar. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill and Other Intangible Assets	'
	Goodwill and Other Intangible Assets
	Goodwill is reviewed for impairment annually or more frequently if impairment indicators arise. The Company allocates goodwill to both the PBM and HCIT segments. There were no impairments of goodwill during the three months ended March 31, 2014 and 2013.
	The changes in the carrying amounts of goodwill by reportable segment for the three months ended March 31, 2014 are as follows (in thousands):
		PBM		HCIT		Total
	Balance at December 31, 2013	$	4,700,610	$	19,665	$	4,720,275
	Measurement period adjustments (a)	254		—		254
	Working capital adjustment (b)	2,026		—		2,026
	Acquisitions	—		—		—
	Balance at March 31, 2014	$	4,702,890	$	19,665	$	4,722,555
	(a)	Represents adjustments to the fair value of assets acquired and liabilities assumed for recent acquisitions during the measurement period. The measurement period adjustments were not recast to the 2013 consolidated financial statements as they were not deemed material.
	(b)	Represents adjustments to purchase price for the Restat acquisition, including settlement of working capital adjustment.
	Definite-lived intangible assets are amortized over the useful lives of the related assets. The components of intangible assets were as follows (in thousands):
		March 31, 2014						December 31, 2013
		Gross Carrying Amount		Accumulated Amortization		Net		Gross Carrying Amount		Accumulated Amortization		Net
	Customer relationships	$	1,527,722	$	408,984	$	1,118,738	$	1,528,475	$	355,737	$	1,172,738
	Non-compete agreements	11,920		5,594		6,326		13,430		6,463		6,967
	Other intangible assets	3,060		1,691		1,369		3,060		1,346		1,714
	Total	$	1,542,702	$	416,269	$	1,126,433	$	1,544,965	$	363,546	$	1,181,419
	Total amortization associated with intangible assets at March 31, 2014 is estimated to be $158.2 million for the remainder of 2014, $194.0 million in 2015, $166.7 million in 2016, $147.5 million in 2017, $137.2 million in 2018, $126.8 million in 2019 and $195.9 million in total for years after 2019.

Debt

Debt	3 Months Ended
	Mar. 31, 2014
Debt Disclosure [Abstract]	'
Debt	'
	Debt
	The following table sets forth the components of the Company's long-term debt, net of debt discounts as of March 31, 2014 and December 31, 2013 (in thousands).
		31-Mar-14			31-Dec-13
	Senior secured term loan facility with an interest rate of 1.81% at March 31, 2014 and December 31, 2013.	$	960,366		$	965,363
	Senior secured revolving credit facility due June 1, 2018 with an interest rate of 1.81% at March 31, 2014 and December 31, 2013.	—			300,000
	4.75% Senior Notes due 2021	492,545			—
	Less current maturities	(56,250		)	(50,000		)
	Long-term debt	$	1,396,661		$	1,215,363
	4.75% Senior Notes
	In March 2014, the Company issued $500.0 million aggregate principal amount of 4.75% Senior Notes due 2021 (the “Senior Notes”). The Senior Notes mature on March 15, 2021 and bear interest at 4.75% per year. The Company will pay interest on the Senior Notes on March 15 and September 15 of each year, or the first business day thereafter if such date is not a business day, commencing on September 15, 2014. The Company received approximately $492.5 million in net proceeds from the Senior Note offering, after deducting $7.5 million in underwriting discounts. Additionally the Company incurred approximately $1.8 million in offering expenses. The Company used part of the net proceeds from this offering to repay $300.0 million of the Company's outstanding borrowings under the Revolving Facility. The Company plans to use the remainder of the net proceeds from this offering for general corporate purposes.
	As discussed, in connection with the Senior Notes, the Company incurred approximately $7.5 million in underwriting debt discount and approximately $1.8 million in debt issuance costs. The $7.5 million debt discount incurred in connection with the Senior Notes is presented on the consolidated balance sheet as a reduction to long-term debt. The debt discount amounts are being amortized to interest expense over the life of the Senior Notes. The Company uses the straight-line method to amortize the debt discount amounts as it does not result in a materially different amount of interest expense than the effective interest rate method. The $1.8 million in offering expenses incurred in connection with the issuance of the Senior Notes are presented on the consolidated balance sheet as other assets. The offering expenses are being amortized to interest expense over the life of the Senior Notes using the straight-line method. The amortization related to financing costs and debt discounts totaled $0.1 million for the three-month period ended March 31, 2014.
	Guarantees
	The Senior Notes are jointly and severally and fully and unconditionally guaranteed by each of the Company’s existing and future wholly-owned subsidiaries that guarantees obligations under (i) the Credit Agreement or (ii) certain other future indebtedness in aggregate principal amount in excess of $175.0 million.
	A subsidiary guarantor will be released from its obligations under its respective guarantee of the Senior Notes upon the release or discharge of such subsidiary guarantor from its guarantee of obligations under the Credit Agreement or certain other future indebtedness in an aggregate principal amount in excess of $175.0 million, or upon the earlier occurrence of certain other customary circumstances as set forth in the indenture. The Senior Notes and the guarantees by the subsidiary guarantors are the general senior unsecured obligations of the Company and the subsidiary guarantors. They rank equally in right of payment with the existing and future senior unsecured indebtedness of the Company and the subsidiary guarantors.
	Prepayments and Repayments
	Prior to the scheduled maturity of the Senior Notes, the Company may at any time redeem all or a part of the Senior Notes, upon not less than 30 nor more than 60 days’ prior written notice at a redemption price equal to the greater of: (i) 100% of the principal amount of the Senior Notes to be redeemed, and (ii) the sum of the present values of the remaining scheduled payments of principal of and interest on the Senior Notes to be redeemed (exclusive of interest accrued to the applicable redemption date) discounted to such redemption date on a semi-annual basis, assuming a 360-day year consisting of twelve 30-day months, at the then current treasury rate plus 50 basis points, plus, in each case, accrued and unpaid interest thereon to, but not including, the applicable redemption date.
	If the Company experiences a change of control triggering event (as defined in the supplemental indenture), holders of the Senior Notes may require the Company to purchase the Senior Notes at a purchase price equal to 101% of the aggregate principal amount, plus accrued and unpaid interest, if any, to the date of purchase.
	The Company is not required to make mandatory redemption payments or sinking fund payments with respect to the Senior Notes.
	Certain Covenants and Events of Default
	The indenture governing the Senior Notes includes certain restrictive covenants, including covenants that limit the Company's ability and the ability of our subsidiaries to, among other things, incur secured debt; enter into sale and leaseback transactions; and amalgamate, consolidate, merge or transfer substantially all of the Company's assets to another entity. The covenants are subject to a number of important exceptions and qualifications set forth in the indenture.
	The indenture governing the Senior Notes provides for customary events of default (subject in certain cases to customary grace and cure periods), which include nonpayment, breach of covenants in the indenture and certain events of bankruptcy and insolvency. Generally, if an event of default occurs, the trustee or holders of at least 25% in aggregate principal amount of and accrued but unpaid interest on the then outstanding Senior Notes may declare the principal amount of all the Senior Notes to be due and payable immediately. As of March 31, 2014, the Company was in compliance with the covenants under the Senior Notes.
	Senior secured credit facility
	Concurrent with the consummation of the Catalyst Merger, on July 2, 2012, the Company entered into a credit agreement (as amended and supplemented from time to time, the “Credit Agreement”) with JPMorgan Chase Bank, N.A. (“JPMCB”), as administrative agent, and a syndicate of lenders in an aggregate principal amount of $1.8 billion. The Credit Agreement provides for (i) a five-year senior secured term loan facility in the amount of $1.0 billion (the “Term Loan Facility”) and (ii) a five-year senior secured revolving facility in the amount of $800.0 million (the “Revolving Facility”).
	The Company made a principal repayment of $6.3 million in January 2014 on the Term Loan facility leaving the Company with $981.3 million outstanding as of March 31, 2014. In March 2014 the Company used the proceeds from the offering of the Senior Notes (refer above for a detailed discussion) to repay $300.0 million of the outstanding borrowings under the Revolving Facility. As of March 31, 2014 the Company had approximately $800.0 million of available borrowing capacity under the Revolving Facility. The amortization related to financing costs and debt discounts associated with the Credit Agreement totaled $2.1 million and $2.5 million for the three-month period ended March 31, 2014 and March 31, 2013, respectively.
	Interest and Fees
	The interest rates applicable to the Term Loan Facility and the Revolving Facility are based on a fluctuating rate of interest measured by reference to either, at the Company’s option, (a) an adjusted London interbank offered rate (adjusted for maximum reserves) (“LIBOR”), plus an applicable margin or (b) an alternative base rate (which is the greatest of (i) the prime rate, (ii) the Federal Funds rate plus 0.5% and (iii) one-month LIBOR plus 1.0%), plus an applicable margin. The applicable margin, in each case, is adjusted from time to time based on the Company’s consolidated leverage ratio as of the last day of each fiscal quarter. The Company intends to continue to elect the LIBOR rate as it has previously done during the term of the Credit Agreement. This resulted in an applicable interest rate of 1.81% at March 31, 2014 for both the Term Loan Facility and the Revolving Facility. See Note 11 — Financial Instruments for information on the Company's interest rate swap agreements. In addition to paying interest on outstanding principal under the Credit Agreement, the Company is required to pay a commitment fee to the lenders in respect of the unutilized commitments under the Credit Agreement at a fluctuating rate based on the Company’s leverage ratio.
	Certain Covenants and Events of Default
	The Credit Agreement contains a number of covenants that require the Company to maintain certain financial ratios, meet customary reporting requirements and restrict, with certain exceptions, transactions the Company or its subsidiaries may enter into, in each case as described further in the Company's 2013 Annual Report on Form 10-K. As of March 31, 2014, the Company was in compliance with the covenants of the Credit Agreement.
	Maturity
	Principal amounts outstanding under the Revolving Facility are due and payable in full on June 1, 2018. Principal repayments on the Term Loan Facility will be due as follows (in thousands):
	Year	Amount due
	2014	$	43,750
	2015	68,750
	2016	93,750
	2017	118,750
	2018	656,250
	Total	$	981,250
	Guarantees and Collateral
	The Company’s obligations under the Credit Agreement are guaranteed by all existing and future, direct and indirect, material subsidiaries of the Company (collectively, the “Subsidiary Guarantors”).  In addition, the Company and each Subsidiary Guarantor have pledged substantially all of their assets, subject to certain exceptions, to secure the Company’s obligations under the Credit Agreement.
	The carrying value of the Company's debt at March 31, 2014 approximates its fair value.

StockBased_Compensation

Stock-Based Compensation	3 Months Ended
	Mar. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Stock-Based Compensation	'
	Stock-Based Compensation
	During the three months ended March 31, 2014 and 2013 the Company recorded stock-based compensation expense of $6.8 million and $6.6 million, respectively. There were 4,677,031 and 684,857 stock-based awards available for grant under the Long-Term Incentive Plan ("LTIP") and the plans assumed in connection with the merger with Catalyst Health Solutions, Inc. ("Assumed Plans"), respectively, as of March 31, 2014.
	(i) Stock options
	The Black-Scholes option-pricing model was used to estimate the fair value of the stock options issued in each period at the grant date. Below is a summary of options granted and the assumptions utilized to derive fair value of the stock options under the Black-Scholes option-pricing model:
		Three Months Ended March 31,
		2014			2013
	Total stock options granted	412,724			365,080
	Volatility	38.7-39.2%			45.4		%
	Risk-free interest rate	1.54-1.73%			0.81		%
	Expected life (in years)	4.5			4.5
	Dividend yield	—			—
	Weighted-average grant date fair value	$	15.51		$	21.44
	The table below summarizes the stock options outstanding as of March 31, 2014 under both plans.
			Options Outstanding		Weighted Average Exercise Price				Unrecognized compensation cost			Weighted Average Period
									(in thousands)
	LTIP		1,507,842		$	34.02			$	12,156		2.93
	Assumed Plans		146,659		$	47.86			$	2,131		3.67
	(ii) Restricted stock units
	During the three months ended March 31, 2014, the Company granted time-based RSUs and performance-based RSUs to its employees and non-employee directors under both the LTIP and the Assumed Plans. Time-based RSUs either vest on a straight-line basis over a range of two to four years, or cliff vest after a three to four year period. Performance-based RSUs cliff vest based upon reaching agreed upon three-year performance conditions. The number of outstanding performance-based RSUs as of March 31, 2014 stated below assumes the associated performance targets will be met at the maximum level.
	The table below summarizes the number of time-based and performance-based RSUs that were granted and outstanding under both plans for the three months ended March 31, 2014:
		LTIP Plan									Assumed Plans
		Number of Restricted Stock Units									Number of Restricted Stock Units
		Time-Based		Performance - Based			Weighted Average Grant Date Fair Value Per Unit				Time-Based		Performance - Based	Weighted Average Grant Date Fair Value Per Unit
	Granted	292,984		392,388			$	44.84			144,607		67,064	$	44.71
	Outstanding	775,207		847,220			$	44.49			316,990		73,378	$	47.31
	The table below summarizes the unrecognized compensation cost related to the outstanding RSUs at March 31, 2014.
		Unrecognized Compensation Cost			Weighted Average Period
		(in thousands)
	LTIP	$	54,078		2.56
	Assumed Plans	$	16,275		3.19

Segment_Information

Segment Information	3 Months Ended
	Mar. 31, 2014
Segment Reporting [Abstract]	'
Segment Information	'
	Segment Information
	The Company reports in two operating segments: PBM and HCIT. The Company evaluates segment performance based upon revenue and gross profit. Financial information by segment is presented below (in thousands):
		Three Months Ended March 31,
		2014		2013
	PBM:
	Revenue	$	4,878,375	$	3,181,553
	Cost of revenue	4,583,284		2,954,101
	Gross profit	295,091		227,452
	Total assets at March 31	8,392,454		7,177,351
	HCIT:
	Revenue	36,104		38,163
	Cost of revenue	16,533		17,243
	Gross profit	19,571		$	20,920
	Total assets at March 31	402,019		119,443
	Consolidated:
	Revenue	4,914,479		3,219,716
	Cost of revenue	4,599,817		2,971,344
	Gross profit	314,662		248,372
	Total assets at March 31	$	8,794,473	$	7,296,794

Income_Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Income Taxes
	The Company’s effective tax rate for the three months ended March 31, 2014 and 2013 was 26.7% and 28.9%, respectively. The Company and its subsidiaries file income tax returns in the U.S. federal jurisdiction, and various state and foreign jurisdictions including Canada. With a few exceptions, the Company is no longer subject to tax examinations by tax authorities for years prior to 2007. The Company's effective tax rate decreased during the three months ended March 31, 2014 primarily due to the mixture of taxable income amongst jurisdictions.

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	Commitments and Contingencies
	From time to time in connection with its operations, the Company is named as a defendant in actions for damages and costs allegedly sustained by third party plaintiffs. The Company has considered these proceedings and disputes in determining the necessity of any accruals for losses that are probable and reasonably estimable. In addition, various aspects of the Company’s business may subject it to litigation and liability for damages arising from errors in processing the pricing of prescription drug claims, failure to meet performance measures within certain contracts relating to its services performed, its ability to obtain certain levels of discounts or rebates on prescription purchases from retail pharmacies and drug manufacturers or other actions or omissions. The Company’s recorded accruals are based on estimates developed with consideration given to the potential merits of claims or quantification of any performance obligations. The Company takes into account its history of claims, the limitations of any insurance coverage, advice from outside counsel, and management’s strategy with regard to the settlement or defense of such claims and obligations. While the ultimate outcome of those claims, lawsuits or performance obligations cannot be predicted with certainty, the Company believes, based on its understanding of the facts of these claims and performance obligations, that adequate provisions have been recorded in the accounts where required.

Financial_Instruments

Financial Instruments	3 Months Ended
	Mar. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Financial Instruments	'
	Financial Instruments
	The Company is subject to interest rate risk related to the variable rate debt under the Credit Agreement. When interest rates increase, interest expense would increase. Conversely, when interest rates decrease, interest expense would also decrease.
	In order to manage fluctuations in cash flows resulting from interest rate risk attributable to changes in the benchmark interest rates used in the Credit Agreement, the Company entered into a 3-year interest rate swap agreement with a total notional amount of $500 million. The swap agreement fixed the variable LIBOR rate on the Company's Term Loan Facility to 0.52%, resulting in a current effective rate as of March 31, 2014 of 2.14% after taking into account the 1.63% margin per the Credit Agreement, as amended. Under the interest rate swap, the Company receives LIBOR-based variable interest rate payments and makes fixed interest rate payments, thereby creating the equivalent to fixed-rate debt with respect to the notional amount of such swap agreements. This interest rate contract derivative instrument was designated as a cash flow hedge upon inception in August, 2012 and it expires in August 2015.
	The Company assesses interest rate cash flow risk by continually identifying and monitoring changes in interest rate exposures that may adversely impact expected future cash flows and by evaluating hedging opportunities. The Company does not enter into derivative instruments for any purpose other than hedging identified exposures. That is, the Company does not speculate using derivative instruments and has not designated any instruments as fair value hedges or hedges of the foreign currency exposure of a net investment in foreign operations.
	The fair value of the interest rate swap liability as of March 31, 2014 was $1.9 million. Interest expense for the three months ended March 31, 2014 includes $0.4 million of expense reclassified from other comprehensive income into current earnings. As of March 31, 2014, approximately $1.0 million of deferred expenses related to the derivative instruments accumulated in other comprehensive income is expected to be reclassified as interest expense during the next twelve months. This expectation is based on the expected timing of the occurrence of the hedged forecasted transactions and assumes the current LIBOR rate will remain consistent. Fluctuations in the market LIBOR rate will have an impact on the amount of expense reclassified from accumulated other comprehensive income to interest expense, as well as the overall fair value of the derivative instrument.

Fair_Value

Fair Value	3 Months Ended
	Mar. 31, 2014
Fair Value Disclosures [Abstract]	'
Fair Value	'
	Fair Value
	Fair value measurement guidance defines a three-level hierarchy to prioritize the inputs to valuation techniques used to measure fair value into three broad levels, with Level 1 considered the most reliable. During the three-month period ended March 31, 2014, there were no movements of fair value measurements between Levels 1, 2 and 3. For assets and liabilities measured at fair value on a recurring basis in the consolidated balance sheets, the table below categorizes fair value measurements across the three levels as of March 31, 2014 and December 31, 2013 (in thousands):
		March 31, 2014
		Quoted Prices in Active Markets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
	Liabilities:
	Contingent purchase price consideration	$	—	$	—	$	20,000	$	20,000
	Derivative	$	—	$	1,858	$	—	$	1,858
		December 31, 2013
		Quoted Prices in Active Markets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
	Liabilities:
	Contingent purchase price consideration	$	—	$	—	$	19,954	$	19,954
	Derivative	$	—	$	1,719	$	—	$	1,719
	When available and appropriate, the Company uses quoted market prices in active markets to determine fair value, and classifies such items within Level 1. Level 1 values only include instruments traded on a public exchange. Level 2 inputs are inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument. Level 2 inputs include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, or inputs other than quoted prices that are observable for the asset or liability or can be derived principally from or corroborated by observable market data. If the Company were to use one or more significant unobservable inputs for a model-derived valuation, the resulting valuation would be classified in Level 3.
	Contingent purchase price consideration
	The contingent purchase price consideration liability reflects the fair values of potential future payments related to certain legacy acquisitions. The potential future payments are contingent upon the acquired entities meeting certain revenue, gross margin and client retention milestones. As of March 31, 2014, the fair value of the contingent purchase price consideration was $20.0 million and was recorded as accrued expenses and other current liabilities in the consolidated balance sheet.
	As the fair value measurement for the contingent consideration is based on inputs not observed in the market, this measurement is classified as Level 3 measurements as defined by fair value measurements guidance.
	Derivatives
	Derivative liabilities relate to the interest rate swap agreement (refer to Note 11 — Financial Instruments for further information), which had a fair value of $1.9 million as of March 31, 2014. As the fair value measurement for the derivative instrument is based on quoted prices from a financial institution, this measurement is classified as Level 2 measurement as defined by fair value measurements guidance.

Earnings_Per_Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2014
Earnings Per Share [Abstract]	'
Earnings Per Share	'
	Earnings Per Share
	The Company calculates basic EPS using the weighted average number of common shares outstanding during the period. Diluted EPS is calculated using the same method as basic EPS, but the Company adds the number of additional common shares that would have been outstanding for the period if the potential dilutive common shares had been issued. The following is the reconciliation between the number of weighted average shares used in the basic and diluted EPS calculations for the three-month period ended March 31, 2014 and 2013:
		Three Months Ended March 31,
		2014	2013
	Weighted average number of shares used in computing basic EPS	206,525,188	205,576,875
	Add dilutive common stock equivalents:
	Outstanding stock options and restricted stock units (a)	561,489	846,674
	Weighted average number of shares used in computing diluted EPS	207,086,677	206,423,549
	(a) Excludes 1,389,283 and 503,379 common stock equivalents for the three-month period ended March 31, 2014 and 2013 because their effect was anti-dilutive.

Concentration_Risk

Concentration Risk	3 Months Ended
	Mar. 31, 2014
Risks and Uncertainties [Abstract]	'
Concentration Risk	'
	Concentration Risk
	For the three-month period ended March 31, 2014 and 2013, one client accounted for 33% and 20% of total revenues, respectively.
	At March 31, 2014, one client accounted for 16% of the outstanding accounts receivable balance. At December 31, 2013, one client accounted for 15% of the outstanding accounts receivable balance.

Condensed_Consolidating_Financ

Condensed Consolidating Financial Statements	3 Months Ended
	Mar. 31, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]	'
Condensed consolidating financial information	'
	Condensed consolidating financial information
	The Senior Notes issued by the Company are fully and unconditionally (subject to certain customary release provisions, including sale, exchange, transfer or liquidation of the guarantor subsidiary) guaranteed by certain of our 100% owned subsidiaries. The following condensed consolidating financial information has been prepared in accordance with the requirements for presentation of such information (statements of comprehensive income were omitted as all other comprehensive income is attributed to the issuer and was not material in any period presented). The condensed consolidating financial information presented below is not indicative of what the financial position, results of operations or cash flows would have been had each of the entities operated as an independent company during the period for various reasons, including, but not limited to, intercompany transactions and integration of systems.
	The condensed consolidating financial information is presented separately for:
	i.	Catamaran Corporation (the parent company), the issuer of the Senior Notes;
	ii.	Guarantor subsidiaries, on a combined basis, as specified in the indenture governing Catamaran's obligations under the Senior Notes;
	iii.	Non-guarantor subsidiaries, on a combined basis;
	iv.	Consolidating entries and eliminations representing adjustments to (a) eliminate intercompany transactions between or among Catamaran Corporation, the guarantor subsidiaries and the non-guarantor subsidiaries, (b) eliminate the investments in our subsidiaries and (c) record consolidating entries; and
	v.	Catamaran Corporation and subsidiaries on a consolidated basis.
	CATAMARAN CORPORATION
	Condensed Consolidated Balance Sheets
	(in thousands)
		Catamaran Corporation			Guarantors			Non-Guarantors			Consolidations			Consolidated
	As of March 31, 2014
	ASSETS
	Current assets
	Cash and cash equivalents	$	201,288		$	446,612		$	36,815		$	—		$	684,715
	Restricted cash	—			27,386			4,836			—			32,222
	Accounts receivable, net	—			907,326			328,755			(104,656		)	1,131,425
	Rebates receivable	45,264			996,215			110,220			(483,646		)	668,053
	Other current assets	50			112,608			40,132			—			152,790
	Intercompany receivable	126,874			107,889			—			(234,763		)	—
	Total current assets	373,476			2,598,036			520,758			(823,065		)	2,669,205
	Property and equipment, net	73			159,088			32,143			—			191,304
	Goodwill	—			4,639,090			83,465			—			4,722,555
	Other intangible assets, net	—			1,106,867			19,566			—			1,126,433
	Investment in subsidiaries	6,053,157			112,590			37,071			(6,202,818		)	—
	Other long-term assets	16,591			47,786			22,023			(1,424		)	84,976
	Total assets	$	6,443,297		$	8,663,457		$	715,026		$	(7,027,307	)	$	8,794,473
	LIABILITIES AND EQUITY
	Current liabilities
	Accounts payable	$	—		$	1,016,210		$	72,835		$	(127,006	)	$	962,039
	Accrued expenses and other current liabilities	3,649			259,708			32,188			—			295,545
	Rebates payable	—			1,158,134			44,412			(483,646		)	718,900
	Current portion - long-term debt	56,250			—			—			—			56,250
	Intercompany payable	—			—			200,819			(200,819		)	—
	Total current liabilities	59,899			2,434,052			350,254			(811,471		)	2,032,734
	Deferred income taxes	—			286,060			5,301			—			291,361
	Long-term debt	1,396,661			—			—			—			1,396,661
	Other long-term liabilities	1,858			61,625			23,447			—			86,930
	Total liabilities	1,458,418			2,781,737			379,002			(811,471		)	3,807,686
	Commitments and contingencies (Note 10)
	Shareholders’ equity
	Total shareholders' equity	4,984,879			5,881,720			334,779			(6,216,499		)	4,984,879
	Non-controlling interest	—			—			1,245			663			1,908
	Total equity	4,984,879			5,881,720			336,024			(6,215,836		)	4,986,787
	Total liabilities and equity	$	6,443,297		$	8,663,457		$	715,026		$	(7,027,307	)	$	8,794,473
	CATAMARAN CORPORATION
	Condensed Consolidated Balance Sheets
	(in thousands)
		Catamaran Corporation			Guarantors			Non-Guarantors			Consolidations			Consolidated
	As of December 31, 2013
	ASSETS
	Current assets
	Cash and cash equivalents	$	15,090		$	350,889		$	21,262		$	—		$	387,241
	Restricted cash	—			27,384			4,836			—			32,220
	Accounts receivable, net	194			954,006			61,319			(55,933		)	959,586
	Rebates receivable	35,777			473,924			92,227			(295,973		)	305,955
	Other current assets	107			114,808			16,785			20,973			152,673
	Intercompany receivable	130,743			—			125,888			(256,631		)	—
	Total current assets	181,911			1,921,011			322,317			(587,564		)	1,837,675
	Property and equipment, net	69			188,676			8,262			—			197,007
	Goodwill	—			4,636,810			83,465			—			4,720,275
	Other intangible assets, net	—			1,160,205			21,214			—			1,181,419
Investment in subsidiaries	5,980,865			105,947			—			(6,086,812		)	—
Other long-term assets	15,674			30,144			59,932			(46,363		)	59,387
Total assets	$	6,178,519		$	8,042,793		$	495,190		$	(6,720,739	)	$	7,995,763
LIABILITIES AND EQUITY
Current liabilities
Accounts payable	$	—		$	840,055		$	37,251		$	(59,501	)	$	817,805
Accrued expenses and other current liabilities	2,947			200,071			28,403			22,679			254,100
Rebates payable	—			612,173			40,065			(295,973		)	356,265
Current portion - long-term debt	50,000			—			—			—			50,000
Intercompany payable	—			232,124			—			(232,124		)	—
Total current liabilities	52,947			1,884,423			105,719			(564,919		)	1,478,170
Deferred income taxes	—			296,040			5,301			—			301,341
Long-term debt	1,215,363			—			—			—			1,215,363
Other long-term liabilities	1,719			86,600			23,651			(22,579		)	89,391
Total liabilities	1,270,029			2,267,063			134,671			(587,498		)	3,084,265
Commitments and contingencies (Note 10)
Shareholders’ equity
Total shareholders' equity	4,908,490			5,775,730			359,274			(6,135,004		)	4,908,490
Non-controlling interest	—			—			1,245			1,763			3,008
Total equity	4,908,490			5,775,730			360,519			(6,133,241		)	4,911,498
Total liabilities and equity	$	6,178,519		$	8,042,793		$	495,190		$	(6,720,739	)	$	7,995,763
CATAMARAN CORPORATION
Condensed Consolidated Statements of Operations
(in thousands)
	Catamaran Corporation			Guarantors			Non-Guarantors			Consolidations			Consolidated
For the Three Months ended March 31, 2014
Revenue	$	11,041		$	4,577,654		$	697,416		$	(371,632	)	$	4,914,479
Cost of revenue	9,594			4,339,549			622,306			(371,632		)	4,599,817
Gross profit	1,447			238,105			75,110			—			314,662
Expenses:
Selling, general and administrative	319			101,330			28,870			—			130,519
Depreciation of property and equipment	9			11,238			1,121			—			12,368
Amortization of intangible assets	—			53,339			1,647			—			54,986
	328			165,907			31,638			—			197,873
Operating income	1,119			72,198			43,472			—			116,789
Interest and other expense, net	9,966			778			592			—			11,336
Equity in (income) in subsidiaries	(72,292		)	(17,402		)	—			89,694			—
Income before income taxes	63,445			88,822			42,880			(89,694		)	105,453
Income tax expense	—			16,530			11,578			—			28,108
Net income	63,445			72,292			31,302			(89,694		)	77,345
Less net income attributable to non-controlling interest	—			—			—			13,900			13,900
Net income attributable to the Company	$	63,445		$	72,292		$	31,302		$	(103,594	)	$	63,445
CATAMARAN CORPORATION
Condensed Consolidated Statements of Operations
(in thousands)
	Catamaran Corporation			Guarantors			Non-Guarantors			Consolidations			Consolidated
For the Three Months ended March 31, 2013
Revenue	$	7,913		$	2,865,980		$	466,834		$	(121,011	)	$	3,219,716
Cost of revenue	7,139			2,668,224			416,992			(121,011		)	2,971,344
Gross profit	774			197,756			49,842			—			248,372
Expenses:
Selling, general and administrative	314			81,962			18,219			—			100,495
Depreciation of property and equipment	9			6,269			692			—			6,970
Amortization of intangible assets	—			48,422			1,634			—			50,056
	323			136,653			20,545			—			157,521
Operating income	451			61,103			29,297			—			90,851
Interest and other (income) expense, net	(15,052		)	25,538			553			—			11,039
Equity in (income) in subsidiaries	(35,904		)	(14,169		)	—			50,073			—
Income before income taxes	51,407			49,734			28,744			(50,073		)	79,812
Income tax expense	—			13,830			9,198			—			23,028
Net income	51,407			35,904			19,546			(50,073		)	56,784
Less net income attributable to non-controlling interest	—			—			—			5,376			5,376
Net income attributable to the Company	$	51,407		$	35,904		$	19,546		$	(55,449	)	$	51,408
CATAMARAN CORPORATION
Condensed Consolidated Statements of Cash Flows
(in thousands)
	Catamaran Corporation			Guarantors			Non-Guarantors			Consolidations			Consolidated
For the Three Months ended March 31, 2014
Cash flows from operating activities:
Net cash provided (used) by operating activities	$	43,878		$	419,040		$	(194,699	)	$	(132,543	)	$	135,676
Cash flows from investing activities:
Acquisitions, net of cash acquired	—			(2,026		)	—			—			(2,026		)
Purchases of property and equipment	(13		)	(4,833		)	(7,936		)	—			(12,782		)
Net cash used in investing activities	(13		)	(6,859		)	(7,936		)	—			(14,808		)
Cash flows from financing activities:
Proceeds from issuance of debt	492,500			—			—			—			492,500
Repayment of long-term debt	(306,250		)	—			—			—			(306,250		)
Payment of financing costs	(955		)	—			—			—			(955		)
Proceeds from exercise of options	5,070			(1,503		)	—			—			3,567
Tax benefit on option exercises	—			2,692			—			—			2,692
Net transactions with parent and affiliates	(66,269		)	(299,906		)	233,632			132,543			—
Distributions to non-controlling interest	—			—			(15,000		)	—			(15,000		)
Proceeds from restricted stock	18,185			(17,741		)	(444		)	—			—
Net cash provided (used) by financing activities	142,281			(316,458		)	218,188			132,543			176,554
Effect of foreign exchange on cash balances	52			—			—			—			52
Change in cash and cash equivalents	186,198			95,723			15,553			—			297,474
Cash and cash equivalents, beginning of period	15,090			350,889			21,262			—			387,241
Cash and cash equivalents, end of period	$	201,288		$	446,612		$	36,815		$	—		$	684,715
CATAMARAN CORPORATION
Condensed Consolidated Statements of Cash Flows
(in thousands)
	Catamaran Corporation			Guarantors			Non-Guarantors			Consolidations			Consolidated
For the Three Months ended March 31, 2013
Cash flows from operating activities:
Net cash provided (used) by operating activities	$	37,310		$	82,038		$	606		$	(56,649	)	$	63,305
Cash flows from investing activities:
Purchases of property and equipment	—			(25,243		)	—			—			(25,243		)
Proceeds from restricted cash	—			20,004			—			—			20,004
Net cash used by investing activities	—			(5,239		)	—			—			(5,239		)
Cash flows from financing activities:
Repayment of long-term debt	(100,000		)	—			—			—			(100,000		)
Proceeds from exercise of options	1,117			(325		)	(7		)	—			785
Tax benefit on option exercises	—			4,924			4			—			4,928
Payments of contingent consideration	—			(18,338		)	(4,865		)	—			(23,203		)
Net transactions with parent and affiliates	12,779			(75,992		)	6,564			56,649			—
Proceeds from restricted stock	20,759			(20,475		)	(284		)	—			—
Net cash (used) provided by financing activities	(65,345		)	(110,206		)	1,412			56,649			(117,490		)
Effect of foreign exchange on cash balances	4			—			—			—			4
Change in cash and cash equivalents	(28,031		)	(33,407		)	2,018			—			(59,420		)
Cash and cash equivalents, beginning of period	33,603			303,832			33,341			—			370,776
Cash and cash equivalents, end of period	$	5,572		$	270,425		$	35,359		$	—		$	311,356

Basis_of_Presentation_Policies

Basis of Presentation (Policies)	3 Months Ended
	Mar. 31, 2014
Basis of Presentation [Abstract]	'
Basis of presentation	'
	Basis of presentation:
	The unaudited consolidated financial statements of the Company have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”), pursuant to the Securities and Exchange Commission’s (“SEC”) rules and regulations for reporting on Form 10-Q, and following accounting policies consistent with the Company’s audited annual consolidated financial statements for the year ended December 31, 2013. The unaudited consolidated financial statements of the Company include its wholly-owned subsidiaries and all significant intercompany transactions and balances have been eliminated in consolidation. Amounts in the unaudited consolidated financial statements and notes thereto are expressed in U.S. dollars, except where indicated. The financial information included herein reflects all adjustments (consisting only of normal recurring adjustments), which, in the opinion of management, are necessary for a fair presentation of the results for the periods presented. Certain reclassifications have been made to conform the prior year's consolidated financial statements to the current year's presentation. The results of operations for the three-month period ended March 31, 2014 are not necessarily indicative of the results to be expected for the full year ending December 31, 2014. As of the issuance date of the Company’s financial statements, the Company has assessed whether subsequent events have occurred that require adjustment to or disclosure in these unaudited consolidated financial statements in accordance with Financial Accounting Standards Board’s (“FASB”) guidance.
	Pursuant to the SEC rules and regulations for reporting on Form 10-Q, certain information and note disclosures normally included in the annual consolidated financial statements prepared in accordance with GAAP have been condensed or excluded. As a result, these unaudited consolidated financial statements do not contain all the disclosures required to be included in the annual consolidated financial statements and should be read in conjunction with the most recent audited annual consolidated financial statements and notes thereto described in our Annual Report on Form 10-K for the year ended December 31, 2013.
Use of estimates	'
	Use of estimates:
	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the period. Significant items subject to such estimates and assumptions include revenue recognition, rebates, purchase price allocation and contingent consideration in connection with acquisitions, valuation of property and equipment, valuation of intangible assets acquired and related amortization periods, impairment of goodwill, income tax uncertainties, contingencies and valuation allowances for receivables and income taxes. Actual results could differ from those estimates.

Business_Combinations_Tables

Business Combinations (Tables)	3 Months Ended
	Mar. 31, 2014
Business Combinations [Abstract]	'
Schedule of fair values assigned to assets acquired and liabilities assumed at the acquisition date	'
	The following summarizes the preliminary fair values assigned to the assets acquired and liabilities assumed at the acquisition date and are subject to change as the valuation processes for intangible assets, rebates, and pharmacy related receivables and payables are not complete. Final determination of the fair values may result in further adjustments to the amounts presented below (in thousands):
		Initial Amounts Recognized at Acquisition Date (a)		Measurement Period Adjustments (b)			Current Amounts Recognized at Acquisition Date
	Accounts receivable	$	13,842	$	—		$	13,842
	Rebates receivable	6,635		(254		)	6,381
	Other current assets	383		—			383
	Total current assets	20,860		(254		)	20,606
	Property and equipment	1,263		—			1,263
	Intangible assets	182,720		—			182,720
	Goodwill	223,474		2,280			225,754
	Total assets acquired	428,317		2,026			430,343
	Accounts payable	22,370		—			22,370
	Rebates payable	16,106		—			16,106
	Accrued liabilities	7,231		—			7,231
	Total liabilities assumed	45,707		—			45,707
	Net assets acquired	$	382,610	$	2,026		$	384,636
	(a) As previously reported in the Company's Form 10-K for the period ended December 31, 2013.
	(b) These measurement period adjustments reflect an additional $2.0 million paid to former Restat owners for working capital reconciliation as well as changes in the estimated fair values of the associated assets acquired and liabilities assumed.
Schedule of estimated fair values and useful lives of intangible assets acquired	'
	The estimated fair values and useful lives of intangible assets acquired are as follows (dollars in thousands):
		Fair Value		Useful Life
	Customer relationships - PBM	$	143,200	10 years
	Customer relationships - cash card	35,500		3 years
	Trademarks/Trade names	1,000		1 year
	Non-compete agreements	3,020		5 years
	Total	$	182,720
Unaudited pro forma results of operations	'
	Unaudited pro forma results of operations are as follows (in thousands, except share and per share amounts):
		Three Months Ended March 31, 2013
	Revenue	$	3,414,064
	Gross profit	$	265,572
	Net income attributable to the Company	$	56,642
	Earnings per share attributable to the Company:
	Basic	$	0.28
	Diluted	$	0.27
	Weighted average shares outstanding:
	Basic	205,576,875
	Diluted	206,423,549

Goodwill_and_Other_Intangible_1

Goodwill and Other Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Changes in carrying amounts of goodwill by reportable segments	'
	The changes in the carrying amounts of goodwill by reportable segment for the three months ended March 31, 2014 are as follows (in thousands):
		PBM		HCIT		Total
	Balance at December 31, 2013	$	4,700,610	$	19,665	$	4,720,275
	Measurement period adjustments (a)	254		—		254
	Working capital adjustment (b)	2,026		—		2,026
	Acquisitions	—		—		—
	Balance at March 31, 2014	$	4,702,890	$	19,665	$	4,722,555
	(a)	Represents adjustments to the fair value of assets acquired and liabilities assumed for recent acquisitions during the measurement period. The measurement period adjustments were not recast to the 2013 consolidated financial statements as they were not deemed material.
	(b)	Represents adjustments to purchase price for the Restat acquisition, including settlement of working capital adjustment
Components of intangible assets	'
	Definite-lived intangible assets are amortized over the useful lives of the related assets. The components of intangible assets were as follows (in thousands):
		March 31, 2014						December 31, 2013
		Gross Carrying Amount		Accumulated Amortization		Net		Gross Carrying Amount		Accumulated Amortization		Net
	Customer relationships	$	1,527,722	$	408,984	$	1,118,738	$	1,528,475	$	355,737	$	1,172,738
	Non-compete agreements	11,920		5,594		6,326		13,430		6,463		6,967
	Other intangible assets	3,060		1,691		1,369		3,060		1,346		1,714
	Total	$	1,542,702	$	416,269	$	1,126,433	$	1,544,965	$	363,546	$	1,181,419

Debt_Tables

Debt (Tables)	3 Months Ended
	Mar. 31, 2014
Debt Disclosure [Abstract]	'
Components of long-term debt	'
	The following table sets forth the components of the Company's long-term debt, net of debt discounts as of March 31, 2014 and December 31, 2013 (in thousands).
		31-Mar-14			31-Dec-13
	Senior secured term loan facility with an interest rate of 1.81% at March 31, 2014 and December 31, 2013.	$	960,366		$	965,363
	Senior secured revolving credit facility due June 1, 2018 with an interest rate of 1.81% at March 31, 2014 and December 31, 2013.	—			300,000
	4.75% Senior Notes due 2021	492,545			—
	Less current maturities	(56,250		)	(50,000		)
	Long-term debt	$	1,396,661		$	1,215,363
Schedule of maturities of principal amounts outstanding under Revolving Facility	'
	Principal amounts outstanding under the Revolving Facility are due and payable in full on June 1, 2018. Principal repayments on the Term Loan Facility will be due as follows (in thousands):
	Year	Amount due
	2014	$	43,750
	2015	68,750
	2016	93,750
	2017	118,750
	2018	656,250
	Total	$	981,250

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Schedule of fair value assumptions	'
	The Black-Scholes option-pricing model was used to estimate the fair value of the stock options issued in each period at the grant date. Below is a summary of options granted and the assumptions utilized to derive fair value of the stock options under the Black-Scholes option-pricing model:
		Three Months Ended March 31,
		2014			2013
	Total stock options granted	412,724			365,080
	Volatility	38.7-39.2%			45.4		%
	Risk-free interest rate	1.54-1.73%			0.81		%
	Expected life (in years)	4.5			4.5
	Dividend yield	—			—
	Weighted-average grant date fair value	$	15.51		$	21.44
Schedule of stock option activity	'
	The table below summarizes the stock options outstanding as of March 31, 2014 under both plans.
			Options Outstanding		Weighted Average Exercise Price				Unrecognized compensation cost			Weighted Average Period
									(in thousands)
	LTIP		1,507,842		$	34.02			$	12,156		2.93
	Assumed Plans		146,659		$	47.86			$	2,131		3.67
Schedule of restricted stock units activity	'
	The table below summarizes the number of time-based and performance-based RSUs that were granted and outstanding under both plans for the three months ended March 31, 2014:
		LTIP Plan									Assumed Plans
		Number of Restricted Stock Units									Number of Restricted Stock Units
		Time-Based		Performance - Based			Weighted Average Grant Date Fair Value Per Unit				Time-Based		Performance - Based	Weighted Average Grant Date Fair Value Per Unit
	Granted	292,984		392,388			$	44.84			144,607		67,064	$	44.71
	Outstanding	775,207		847,220			$	44.49			316,990		73,378	$	47.31
Schedule of unrecognized compensation expenses	'
	The table below summarizes the unrecognized compensation cost related to the outstanding RSUs at March 31, 2014.
		Unrecognized Compensation Cost			Weighted Average Period
		(in thousands)
	LTIP	$	54,078		2.56
	Assumed Plans	$	16,275		3.19

Segment_Information_Tables

Segment Information (Tables)	3 Months Ended
	Mar. 31, 2014
Segment Reporting [Abstract]	'
Schedule of financial information by segment	'
	The Company reports in two operating segments: PBM and HCIT. The Company evaluates segment performance based upon revenue and gross profit. Financial information by segment is presented below (in thousands):
		Three Months Ended March 31,
		2014		2013
	PBM:
	Revenue	$	4,878,375	$	3,181,553
	Cost of revenue	4,583,284		2,954,101
	Gross profit	295,091		227,452
	Total assets at March 31	8,392,454		7,177,351
	HCIT:
	Revenue	36,104		38,163
	Cost of revenue	16,533		17,243
	Gross profit	19,571		$	20,920
	Total assets at March 31	402,019		119,443
	Consolidated:
	Revenue	4,914,479		3,219,716
	Cost of revenue	4,599,817		2,971,344
	Gross profit	314,662		248,372
	Total assets at March 31	$	8,794,473	$	7,296,794

Fair_Value_Tables

Fair Value (Tables)	3 Months Ended
	Mar. 31, 2014
Fair Value Disclosures [Abstract]	'
Schedule of fair value measurements	'
	For assets and liabilities measured at fair value on a recurring basis in the consolidated balance sheets, the table below categorizes fair value measurements across the three levels as of March 31, 2014 and December 31, 2013 (in thousands):
		March 31, 2014
		Quoted Prices in Active Markets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
	Liabilities:
	Contingent purchase price consideration	$	—	$	—	$	20,000	$	20,000
	Derivative	$	—	$	1,858	$	—	$	1,858
		December 31, 2013
		Quoted Prices in Active Markets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
	Liabilities:
	Contingent purchase price consideration	$	—	$	—	$	19,954	$	19,954
	Derivative	$	—	$	1,719	$	—	$	1,719

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2014
Earnings Per Share [Abstract]	'
Schedule of weighted average number of shares	'
	The following is the reconciliation between the number of weighted average shares used in the basic and diluted EPS calculations for the three-month period ended March 31, 2014 and 2013:
		Three Months Ended March 31,
		2014	2013
	Weighted average number of shares used in computing basic EPS	206,525,188	205,576,875
	Add dilutive common stock equivalents:
	Outstanding stock options and restricted stock units (a)	561,489	846,674
	Weighted average number of shares used in computing diluted EPS	207,086,677	206,423,549
	(a) Excludes 1,389,283 and 503,379 common stock equivalents for the three-month period ended March 31, 2014 and 2013 because their effect was anti-dilutive.

Condensed_Consolidating_Financ1

Condensed Consolidating Financial Statements (Tables)	3 Months Ended
	Mar. 31, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]	'
Summary of condensed balance sheets	'
	CATAMARAN CORPORATION
	Condensed Consolidated Balance Sheets
	(in thousands)
		Catamaran Corporation			Guarantors			Non-Guarantors			Consolidations			Consolidated
	As of March 31, 2014
	ASSETS
	Current assets
	Cash and cash equivalents	$	201,288		$	446,612		$	36,815		$	—		$	684,715
	Restricted cash	—			27,386			4,836			—			32,222
	Accounts receivable, net	—			907,326			328,755			(104,656		)	1,131,425
	Rebates receivable	45,264			996,215			110,220			(483,646		)	668,053
	Other current assets	50			112,608			40,132			—			152,790
	Intercompany receivable	126,874			107,889			—			(234,763		)	—
	Total current assets	373,476			2,598,036			520,758			(823,065		)	2,669,205
	Property and equipment, net	73			159,088			32,143			—			191,304
	Goodwill	—			4,639,090			83,465			—			4,722,555
	Other intangible assets, net	—			1,106,867			19,566			—			1,126,433
	Investment in subsidiaries	6,053,157			112,590			37,071			(6,202,818		)	—
	Other long-term assets	16,591			47,786			22,023			(1,424		)	84,976
	Total assets	$	6,443,297		$	8,663,457		$	715,026		$	(7,027,307	)	$	8,794,473
	LIABILITIES AND EQUITY
	Current liabilities
	Accounts payable	$	—		$	1,016,210		$	72,835		$	(127,006	)	$	962,039
	Accrued expenses and other current liabilities	3,649			259,708			32,188			—			295,545
	Rebates payable	—			1,158,134			44,412			(483,646		)	718,900
	Current portion - long-term debt	56,250			—			—			—			56,250
	Intercompany payable	—			—			200,819			(200,819		)	—
	Total current liabilities	59,899			2,434,052			350,254			(811,471		)	2,032,734
	Deferred income taxes	—			286,060			5,301			—			291,361
	Long-term debt	1,396,661			—			—			—			1,396,661
	Other long-term liabilities	1,858			61,625			23,447			—			86,930
	Total liabilities	1,458,418			2,781,737			379,002			(811,471		)	3,807,686
	Commitments and contingencies (Note 10)
	Shareholders’ equity
	Total shareholders' equity	4,984,879			5,881,720			334,779			(6,216,499		)	4,984,879
	Non-controlling interest	—			—			1,245			663			1,908
	Total equity	4,984,879			5,881,720			336,024			(6,215,836		)	4,986,787
	Total liabilities and equity	$	6,443,297		$	8,663,457		$	715,026		$	(7,027,307	)	$	8,794,473
	CATAMARAN CORPORATION
	Condensed Consolidated Balance Sheets
	(in thousands)
		Catamaran Corporation			Guarantors			Non-Guarantors			Consolidations			Consolidated
	As of December 31, 2013
	ASSETS
	Current assets
	Cash and cash equivalents	$	15,090		$	350,889		$	21,262		$	—		$	387,241
	Restricted cash	—			27,384			4,836			—			32,220
	Accounts receivable, net	194			954,006			61,319			(55,933		)	959,586
	Rebates receivable	35,777			473,924			92,227			(295,973		)	305,955
	Other current assets	107			114,808			16,785			20,973			152,673
	Intercompany receivable	130,743			—			125,888			(256,631		)	—
	Total current assets	181,911			1,921,011			322,317			(587,564		)	1,837,675
	Property and equipment, net	69			188,676			8,262			—			197,007
	Goodwill	—			4,636,810			83,465			—			4,720,275
	Other intangible assets, net	—			1,160,205			21,214			—			1,181,419
	Investment in subsidiaries	5,980,865			105,947			—			(6,086,812		)	—
	Other long-term assets	15,674			30,144			59,932			(46,363		)	59,387
	Total assets	$	6,178,519		$	8,042,793		$	495,190		$	(6,720,739	)	$	7,995,763
	LIABILITIES AND EQUITY
	Current liabilities
	Accounts payable	$	—		$	840,055		$	37,251		$	(59,501	)	$	817,805
	Accrued expenses and other current liabilities	2,947			200,071			28,403			22,679			254,100
	Rebates payable	—			612,173			40,065			(295,973		)	356,265
Current portion - long-term debt	50,000			—			—			—			50,000
Intercompany payable	—			232,124			—			(232,124		)	—
Total current liabilities	52,947			1,884,423			105,719			(564,919		)	1,478,170
Deferred income taxes	—			296,040			5,301			—			301,341
Long-term debt	1,215,363			—			—			—			1,215,363
Other long-term liabilities	1,719			86,600			23,651			(22,579		)	89,391
Total liabilities	1,270,029			2,267,063			134,671			(587,498		)	3,084,265
Commitments and contingencies (Note 10)
Shareholders’ equity
Total shareholders' equity	4,908,490			5,775,730			359,274			(6,135,004		)	4,908,490
Non-controlling interest	—			—			1,245			1,763			3,008
Total equity	4,908,490			5,775,730			360,519			(6,133,241		)	4,911,498
Total liabilities and equity	$	6,178,519		$	8,042,793		$	495,190		$	(6,720,739	)	$	7,995,763
Summary of condensed income statements	'
	CATAMARAN CORPORATION
	Condensed Consolidated Statements of Operations
	(in thousands)
		Catamaran Corporation			Guarantors			Non-Guarantors			Consolidations			Consolidated
	For the Three Months ended March 31, 2014
	Revenue	$	11,041		$	4,577,654		$	697,416		$	(371,632	)	$	4,914,479
	Cost of revenue	9,594			4,339,549			622,306			(371,632		)	4,599,817
	Gross profit	1,447			238,105			75,110			—			314,662
	Expenses:
	Selling, general and administrative	319			101,330			28,870			—			130,519
	Depreciation of property and equipment	9			11,238			1,121			—			12,368
	Amortization of intangible assets	—			53,339			1,647			—			54,986
		328			165,907			31,638			—			197,873
	Operating income	1,119			72,198			43,472			—			116,789
	Interest and other expense, net	9,966			778			592			—			11,336
	Equity in (income) in subsidiaries	(72,292		)	(17,402		)	—			89,694			—
	Income before income taxes	63,445			88,822			42,880			(89,694		)	105,453
	Income tax expense	—			16,530			11,578			—			28,108
	Net income	63,445			72,292			31,302			(89,694		)	77,345
	Less net income attributable to non-controlling interest	—			—			—			13,900			13,900
	Net income attributable to the Company	$	63,445		$	72,292		$	31,302		$	(103,594	)	$	63,445
	CATAMARAN CORPORATION
	Condensed Consolidated Statements of Operations
	(in thousands)
		Catamaran Corporation			Guarantors			Non-Guarantors			Consolidations			Consolidated
	For the Three Months ended March 31, 2013
	Revenue	$	7,913		$	2,865,980		$	466,834		$	(121,011	)	$	3,219,716
	Cost of revenue	7,139			2,668,224			416,992			(121,011		)	2,971,344
	Gross profit	774			197,756			49,842			—			248,372
	Expenses:
	Selling, general and administrative	314			81,962			18,219			—			100,495
	Depreciation of property and equipment	9			6,269			692			—			6,970
	Amortization of intangible assets	—			48,422			1,634			—			50,056
		323			136,653			20,545			—			157,521
	Operating income	451			61,103			29,297			—			90,851
	Interest and other (income) expense, net	(15,052		)	25,538			553			—			11,039
	Equity in (income) in subsidiaries	(35,904		)	(14,169		)	—			50,073			—
	Income before income taxes	51,407			49,734			28,744			(50,073		)	79,812
	Income tax expense	—			13,830			9,198			—			23,028
	Net income	51,407			35,904			19,546			(50,073		)	56,784
	Less net income attributable to non-controlling interest	—			—			—			5,376			5,376
	Net income attributable to the Company	$	51,407		$	35,904		$	19,546		$	(55,449	)	$	51,408
Summary of condensed cash flow statements	'
	CATAMARAN CORPORATION
	Condensed Consolidated Statements of Cash Flows
	(in thousands)
		Catamaran Corporation			Guarantors			Non-Guarantors			Consolidations			Consolidated
	For the Three Months ended March 31, 2014
	Cash flows from operating activities:
	Net cash provided (used) by operating activities	$	43,878		$	419,040		$	(194,699	)	$	(132,543	)	$	135,676
	Cash flows from investing activities:
	Acquisitions, net of cash acquired	—			(2,026		)	—			—			(2,026		)
	Purchases of property and equipment	(13		)	(4,833		)	(7,936		)	—			(12,782		)
	Net cash used in investing activities	(13		)	(6,859		)	(7,936		)	—			(14,808		)
	Cash flows from financing activities:
	Proceeds from issuance of debt	492,500			—			—			—			492,500
	Repayment of long-term debt	(306,250		)	—			—			—			(306,250		)
	Payment of financing costs	(955		)	—			—			—			(955		)
	Proceeds from exercise of options	5,070			(1,503		)	—			—			3,567
	Tax benefit on option exercises	—			2,692			—			—			2,692
	Net transactions with parent and affiliates	(66,269		)	(299,906		)	233,632			132,543			—
	Distributions to non-controlling interest	—			—			(15,000		)	—			(15,000		)
	Proceeds from restricted stock	18,185			(17,741		)	(444		)	—			—
	Net cash provided (used) by financing activities	142,281			(316,458		)	218,188			132,543			176,554
	Effect of foreign exchange on cash balances	52			—			—			—			52
	Change in cash and cash equivalents	186,198			95,723			15,553			—			297,474
	Cash and cash equivalents, beginning of period	15,090			350,889			21,262			—			387,241
	Cash and cash equivalents, end of period	$	201,288		$	446,612		$	36,815		$	—		$	684,715
	CATAMARAN CORPORATION
	Condensed Consolidated Statements of Cash Flows
	(in thousands)
		Catamaran Corporation			Guarantors			Non-Guarantors			Consolidations			Consolidated
	For the Three Months ended March 31, 2013
	Cash flows from operating activities:
	Net cash provided (used) by operating activities	$	37,310		$	82,038		$	606		$	(56,649	)	$	63,305
	Cash flows from investing activities:
	Purchases of property and equipment	—			(25,243		)	—			—			(25,243		)
	Proceeds from restricted cash	—			20,004			—			—			20,004
	Net cash used by investing activities	—			(5,239		)	—			—			(5,239		)
	Cash flows from financing activities:
	Repayment of long-term debt	(100,000		)	—			—			—			(100,000		)
	Proceeds from exercise of options	1,117			(325		)	(7		)	—			785
	Tax benefit on option exercises	—			4,924			4			—			4,928
	Payments of contingent consideration	—			(18,338		)	(4,865		)	—			(23,203		)
	Net transactions with parent and affiliates	12,779			(75,992		)	6,564			56,649			—
	Proceeds from restricted stock	20,759			(20,475		)	(284		)	—			—
	Net cash (used) provided by financing activities	(65,345		)	(110,206		)	1,412			56,649			(117,490		)
	Effect of foreign exchange on cash balances	4			—			—			—			4
	Change in cash and cash equivalents	(28,031		)	(33,407		)	2,018			—			(59,420		)
	Cash and cash equivalents, beginning of period	33,603			303,832			33,341			—			370,776
	Cash and cash equivalents, end of period	$	5,572		$	270,425		$	35,359		$	—		$	311,356

Business_Combinations_Restat_D

Business Combinations Restat (Details) (USD $)

3 Months Ended

0 Months Ended

3 Months Ended

0 Months Ended

0 Months Ended

0 Months Ended

Mar. 31, 2014

Mar. 31, 2013

Dec. 31, 2013

Jul. 02, 2012

Oct. 02, 2013

Mar. 31, 2014

Oct. 02, 2013

Oct. 02, 2013

Oct. 02, 2013

Oct. 02, 2013

Oct. 02, 2013

Oct. 02, 2013

Oct. 02, 2013

Oct. 02, 2013

Revolving Credit Facility [Member]

Restat [Member]

Restat [Member]

Restat [Member]

Restat [Member]

Restat [Member]

Restat [Member]

Restat [Member]

Restat [Member]

Restat [Member]

Restat [Member]

Customer Relationship - PBM [Member]

Customer Relationship, Cash Cards [Member]

Trademarks and Trade Names [Member]

Non-compete agreements [Member]

Initial Amounts Recognized at Acquisition Date [Member]

Measurement Period Adjustments [Member]

Current Amounts Recognized at Acquisition Date [Member]

Revolving Credit Facility [Member]

Business Acquisition [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Purchase price

'

'

'

'

$409,500,000

'

'

'

'

'

'

'

'

'

Debt amount

'

'

'

'

'

'

'

'

'

'

'

'

'

350,000,000

Term of long-term debt

'

'

'

'5 years

'

'

'

'

'

'

'

'

'

'5 years

Goodwill expected to be tax deductible

'

'

'

'

225,800,000

'

'

'

'

'

'

'

'

'

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Accounts receivable

'

'

'

'

'

'

'

'

'

'

13,842,000

[1]

0

[2]

13,842,000

'

Rebates receivable

'

'

'

'

'

'

'

'

'

'

6,635,000

[1]

-254,000

[2]

6,381,000

'

Other current assets

'

'

'

'

'

'

'

'

'

'

383,000

[1]

0

[2]

383,000

'

Total current assets

'

'

'

'

'

'

'

'

'

'

20,860,000

[1]

-254,000

[2]

20,606,000

'

Property and equipment

'

'

'

'

'

'

'

'

'

'

1,263,000

[1]

0

[2]

1,263,000

'

Intangible assets

'

'

'

'

182,720,000

'

143,200,000

35,500,000

1,000,000

3,020,000

182,720,000

[1]

0

[2]

182,720,000

'

Goodwill

4,722,555,000

'

4,720,275,000

'

'

'

'

'

'

'

223,474,000

[1]

2,280,000

[2]

225,754,000

'

Total assets acquired

'

'

'

'

'

'

'

'

'

'

428,317,000

[1]

2,026,000

[2]

430,343,000

'

Accounts payable

'

'

'

'

'

'

'

'

'

'

22,370,000

[1]

0

[2]

22,370,000

'

Rebates payable

'

'

'

'

'

'

'

'

'

'

16,106,000

[1]

0

[2]

16,106,000

'

Accrued liabilities

'

'

'

'

'

'

'

'

'

'

7,231,000

[1]

0

[2]

7,231,000

'

Total liabilities assumed

'

'

'

'

'

'

'

'

'

'

45,707,000

[1]

0

[2]

45,707,000

'

Net assets acquired

'

'

'

'

'

'

'

'

'

'

382,610,000

[1]

2,026,000

[2]

384,636,000

'

Measurement period adjustment paid to former Restat owners

'

'

'

'

'

'

'

'

'

'

'

2,000,000

'

'

Amortization of intangible assets

54,986,000

50,056,000

'

'

'

8,700,000

'

'

'

'

'

'

'

'

Future amortization expense, remainder of 2014

$158,200,000

'

'

'

'

$25,000,000

'

'

'

'

'

'

'

'

Acquired intangible assets, useful life

'

'

'

'

'

'

'10 years

'3 years

'1 year

'5 years

'

'

'

'

[1]

As previously reported in the Company's Form 10-K for the period ended December 31, 2013.

[2]

These measurement period adjustments reflect an additional $2.0 million paid to former Restat owners for working capital reconciliation as well as changes in the estimated fair values of the associated assets acquired and liabilities assumed.

Business_Combinations_Pro_Form

Business Combinations Pro Forma Information (Details) (Restat [Member], USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013
Restat [Member]	'
Business Acquisition, Pro Forma Information [Abstract]	'
Revenue	$3,414,064
Gross profit	265,572
Net income attributable to the Company	$56,642
Earnings per share attributable to the Company:	'
Basic (in dollars per share)	$0.28
Diluted (in dollars per share)	$0.27
Weighted average number of shares used in computing earnings per share:	'
Basic (in shares)	205,576,875
Diluted (in shares)	206,423,549

Goodwill_and_Other_Intangible_2

Goodwill and Other Intangible Assets (Details) 1 (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014
Goodwill [Roll Forward]	'
Goodwill, Beginning Balance	$4,720,275
Goodwill, Measurement period adjustment	254	[1]
Goodwill, Working Capital Adjustments	2,026	[2]
Goodwill, Acquisitions	0
Goodwill, Ending Balance	4,722,555
P B M	'
Goodwill [Roll Forward]	'
Goodwill, Beginning Balance	4,700,610
Goodwill, Measurement period adjustment	254	[1]
Goodwill, Working Capital Adjustments	2,026	[2]
Goodwill, Acquisitions	0
Goodwill, Ending Balance	4,702,890
H C I T	'
Goodwill [Roll Forward]	'
Goodwill, Beginning Balance	19,665
Goodwill, Measurement period adjustment	0	[1]
Goodwill, Working Capital Adjustments	0	[2]
Goodwill, Acquisitions	0
Goodwill, Ending Balance	$19,665
[1]	Represents adjustments to the fair value of assets acquired and liabilities assumed for recent acquisitions during the measurement period. The measurement period adjustments were not recast to the 2013 consolidated financial statements as they were not deemed material.
[2]	Represents adjustments to purchase price for the Restat acquisition, including settlement of working capital adjustment

Goodwill_and_Other_Intangible_3

Goodwill and Other Intangible Assets (Details) 2 (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	$1,542,702	$1,544,965
Accumulated Amortization	416,269	363,546
Net	1,126,433	1,181,419
Customer relationships [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	1,527,722	1,528,475
Accumulated Amortization	408,984	355,737
Net	1,118,738	1,172,738
Non-compete agreements [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	11,920	13,430
Accumulated Amortization	5,594	6,463
Net	6,326	6,967
Other intangible assets [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	3,060	3,060
Accumulated Amortization	1,691	1,346
Net	$1,369	$1,714

Goodwill_and_Other_Intangible_4

Goodwill and Other Intangible Assets (Details) 3 (USD $)	Mar. 31, 2014
In Millions, unless otherwise specified
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]	'
Future amortization expense, remainder of 2014	$158.20
Future amortization expense, 2015	194
Future amortization expense, 2016	166.7
Future amortization expense, 2017	147.5
Future amortization expense, 2018	137.2
Future amortization expense 2019	126.8
Future amortization expense after 2019	$195.90

Debt_Details

Debt (Details) (USD $)

3 Months Ended

0 Months Ended

3 Months Ended

1 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

1 Months Ended

3 Months Ended

3 Months Ended

1 Months Ended

3 Months Ended

Mar. 31, 2014

Mar. 31, 2013

Dec. 31, 2013

Jul. 02, 2012

Jul. 02, 2012

Jul. 02, 2012

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Jan. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Revolving Credit Facility [Member]

Term Loan Facility [Member]

Term Loan Facility [Member]

Secured Debt [Member]

Secured Debt [Member]

Secured Debt [Member]

Secured Debt [Member]

Secured Debt [Member]

4.75% Senior Notes [Member]

4.75% Senior Notes [Member]

4.75% Senior Notes [Member]

Federal Funds Rate [Member]

Federal Funds Rate [Member]

LIBOR [Member]

LIBOR [Member]

Amended Credit Agreement [Member]

Amended Credit Agreement [Member]

Amended Credit Agreement [Member]

Debt Instrument, Redemption, Period One [Member]

Debt Instrument, Redemption, Period One [Member]

Debt Instrument, Redemption, Period One [Member]

Financial guarantee

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Term Loan Facility [Member]

Term Loan Facility [Member]

Revolving Credit Facility [Member]

Term Loan Facility [Member]

Revolving Credit Facility [Member]

Term Loan Facility [Member]

Revolving Credit Facility [Member]

Term Loan Facility [Member]

Term Loan Facility [Member]

4.75% Senior Notes [Member]

Minimum [Member]

Maximum [Member]

4.75% Senior Notes [Member]

4.75% Senior Notes [Member]

4.75% Senior Notes [Member]

Line of Credit Facility [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stated interest rate

'

'

'

'

'

'

'

'

'

'

'

'

4.75%

4.75%

'

'

'

'

'

'

'

'

'

'

'

'

Long-term Debt, by Category, Current and Noncurrent [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term debt

'

'

'

'

'

'

$981,250,000

$0

$0

$300,000,000

$960,366,000

$965,363,000

$492,545,000

$492,545,000

$0

'

'

'

'

'

'

$981,300,000

'

'

'

'

Less current maturities

-56,250,000

'

-50,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term debt

1,396,661,000

'

1,215,363,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt amount

'

'

'

1,800,000,000

800,000,000

1,000,000,000

'

'

'

'

'

'

500,000,000

500,000,000

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from issuance of debt

'

'

'

'

'

'

'

'

'

'

'

'

492,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt discount

'

'

'

'

'

'

'

'

'

'

'

'

7,500,000

7,500,000

'

'

'

'

'

'

'

'

'

'

'

'

Debt issuance cost paid

'

'

'

'

'

'

'

'

'

'

'

'

1,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Repayments of Long-term Lines of Credit

'

'

'

'

'

'

'

300,000,000

'

'

'

'

'

'

'

'

'

'

'

300,000,000

6,300,000

'

'

'

'

'

Amortization of financing costs and debt discounts

'

'

'

'

'

'

'

'

'

'

'

'

'

100,000

'

'

'

'

'

'

'

'

'

'

'

'

Trigger amount for redemption of debt

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

175,000,000

Redemption period

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'30 days

'60 days

'

Redemption price, percentage of principle amount redeemable

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100.00%

'

'

'

Redemption price, percentage

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

101.00%

'

'

'

Percentage of aggregate amount of debt required to make note due and payable immediately

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

25.00%

'

'

'

Term of long-term debt

'

'

'

'

'5 years

'5 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Line of credit, remaining borrowing capacity

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

800,000,000

'

'

'

'

'

'

Amortization related to financing costs and debt discounts

$2,100,000

$2,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Initial applicable margin for borrowings

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.50%

0.50%

1.00%

1.00%

'

'

'

0.50%

'

'

'

Interest rate during period

'

'

'

'

'

'

1.81%

'

1.81%

1.81%

1.81%

1.81%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt_Maturities_Details

Debt Maturities (Details) (Term Loan Facility [Member], USD $)	Mar. 31, 2014
In Thousands, unless otherwise specified
Term Loan Facility [Member]	'
Long-term Debt, Fiscal Year Maturity [Abstract]	'
2014	$43,750
2015	68,750
2016	93,750
2017	118,750
2018	656,250
Long-term debt	$981,250

StockBased_Compensation_Detail

Stock-Based Compensation (Details) 1 (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Stockholders' Equity [Line Items]	'	'
Stock-based compensation	$6,828	$6,644
LTIP [Member]	'	'
Stockholders' Equity [Line Items]	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	4,677,031	'
Assumed Plans [Member]	'	'
Stockholders' Equity [Line Items]	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	684,857	'

StockBased_Compensation_Detail1

Stock-Based Compensation (Details) 2 (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Stock Options [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]	'	'
Total stock options granted	412,724	365,080
Volatility	'	45.40%
Risk-free interest rate	'	0.81%
Expected life (in years)	'4 years 6 months	'4 years 6 months
Dividend yield	0.00%	0.00%
Weighted-average grant date fair value (in dollars per share)	$15.51	$21.44
Minimum [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]	'	'
Volatility	38.70%	'
Minimum [Member] | Stock Options [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]	'	'
Risk-free interest rate	1.54%	'
Maximum [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]	'	'
Volatility	39.20%	'
Maximum [Member] | Stock Options [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]	'	'
Risk-free interest rate	1.73%	'

StockBased_Compensation_Detail2

Stock-Based Compensation (Details) 3 (Stock Options [Member], USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2014
LTIP Plan [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Unrecognized compensation costs on nonvested awards, weighted average period of recognition (in years)	'2 years 11 months 5 days
Options Outstanding (in shares)	1,507,842
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$34.02
Unrecognized compensation cost	$12,156
Assumed Plans [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Unrecognized compensation costs on nonvested awards, weighted average period of recognition (in years)	'3 years 8 months 1 day
Options Outstanding (in shares)	146,659
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$47.86
Unrecognized compensation cost	$2,131

StockBased_Compensation_Detail3

Stock-Based Compensation (Details) 4 (USD $)	3 Months Ended
	Mar. 31, 2014
Restricted Stock Units Performance Based [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Vesting period	'3 years
LTIP Plan [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Weighted average grant date fair value of restricted units outstanding (per unit)	44.49
LTIP Plan [Member] | Restricted Stock Units Time Based [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Number of restricted units granted	292,984
Number of restricted units outstanding	775,207
LTIP Plan [Member] | Restricted Stock Units Performance Based [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Number of restricted units granted	392,388
Number of restricted units outstanding	847,220
LTIP Plan [Member] | Restricted Stock Units (RSUs) [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Weighted average grant date value of restricted units granted (per unit)	44.84
Assumed Plans [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Weighted average grant date fair value of restricted units outstanding (per unit)	47.31
Assumed Plans [Member] | Restricted Stock Units Time Based [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Number of restricted units granted	144,607
Number of restricted units outstanding	316,990
Assumed Plans [Member] | Restricted Stock Units Performance Based [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Number of restricted units granted	67,064
Number of restricted units outstanding	73,378
Assumed Plans [Member] | Restricted Stock Units (RSUs) [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Weighted average grant date value of restricted units granted (per unit)	44.71
Straight Line Vesting Basis [Member] | Restricted Stock Units Time Based [Member] | Minimum [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Vesting period	'2 years
Straight Line Vesting Basis [Member] | Restricted Stock Units Time Based [Member] | Maximum [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Vesting period	'4 years
Cliff Vesting [Member] | Restricted Stock Units Time Based [Member] | Minimum [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Vesting period	'3 years
Cliff Vesting [Member] | Restricted Stock Units Time Based [Member] | Maximum [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Vesting period	'4 years

StockBased_Compensation_Detail4

Stock-Based Compensation (Details) 5 (Restricted Stock Units (RSUs) [Member], USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014
LTIP Plan [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Unrecognized compensation costs on nonvested awards	$54,078
Unrecognized compensation costs on nonvested awards, weighted average period of recognition (in years)	'2 years 6 months 22 days
Assumed Plans [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Unrecognized compensation costs on nonvested awards	$16,275
Unrecognized compensation costs on nonvested awards, weighted average period of recognition (in years)	'3 years 2 months 8 days

Segment_Information_Details

Segment Information (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
	segment
Segment Reporting Information [Line Items]	'	'	'
Number of operating segments	2	'	'
Revenues	$4,914,479	$3,219,716	'
Cost of revenue	4,599,817	2,971,344	'
Gross profit	314,662	248,372	'
Total assets	8,794,473	7,296,794	7,995,763
P B M	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Revenues	4,878,375	3,181,553	'
Cost of revenue	4,583,284	2,954,101	'
Gross profit	295,091	227,452	'
Total assets	8,392,454	7,177,351	'
H C I T	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Revenues	36,104	38,163	'
Cost of revenue	16,533	17,243	'
Gross profit	19,571	20,920	'
Total assets	$402,019	$119,443	'

Income_Taxes_Details

Income Taxes (Details)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Income Tax Disclosure [Abstract]	'	'
Effective income tax rate	26.70%	28.90%

Financial_Instruments_Details

Financial Instruments (Details) (USD $)	Mar. 31, 2014	Mar. 31, 2014	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014
		Interest Rate Swap [Member]	Interest Rate Swap [Member]	Fair Value, Inputs, Level 2 [Member]	Fair Value, Inputs, Level 2 [Member]
			Fair Value, Measurements, Recurring [Member]	Fair Value, Measurements, Recurring [Member]	Interest Rate Swap [Member]
					Fair Value, Measurements, Recurring [Member]
Derivative [Line Items]	'	'	'	'	'
Length of interest rate swap	'	'3 years	'	'	'
Notional amount of interest rate cash flow hedge derivatives	'	$500,000,000	'	'	'
Libor rate	'	0.52%	'	'	'
Effective interest rate	'	2.14%	'	'	'
Basis spread on variable rate	'	1.63%	'	'	'
Fair value of interest rate swap	'	'	'	1,719,000	1,858,000
Cash flow hedge loss reclassified to interest expense	'	'	400,000	'	'
Deferred expenses related to derivative instruments	$1,000,000	'	'	'	'

Fair_Value_Details

Fair Value (Details) (Fair Value, Measurements, Recurring [Member], USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Inputs, Level 2 [Member]	'	'
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Derivative	'	$1,719
Fair Value, Inputs, Level 3 [Member]	'	'
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Contingent purchase price consideration	20,000	19,954
Estimate of Fair Value, Fair Value Disclosure [Member]	'	'
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Contingent purchase price consideration	20,000	19,954
Derivative	1,858	1,719
Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member]	'	'
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]	'	'
Derivative	$1,858	'

Earnings_Per_Share_Details_1

Earnings Per Share (Details) 1	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Earnings Per Share [Abstract]	'		'
Weighted average number of shares used in computing basic EPS	206,525,188		205,576,875
Add dilutive common stock equivalents:	'		'
Outstanding stock options and restricted stock units	561,489	[1]	846,674	[1]
Weighted average number of shares used in computing diluted EPS	207,086,677		206,423,549
[1]	Excludes 1,389,283 and 503,379 common stock equivalents for the three-month period ended March 31, 2014 and 2013 because their effect was anti-dilutive.

Earnings_Per_Share_Details_2

Earnings Per Share (Details) 2 (Anti-dilutive Stock Options and RSU)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Anti-dilutive Stock Options and RSU	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Antidilutive securities excluded from computation of earnings per share, amount	1,389,283	503,379

Concentration_Risk_Details

Concentration Risk (Details) (Customer Concentration Risk [Member])	3 Months Ended			12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Dec. 31, 2013
	Sales [Member]	Sales [Member]	Accounts Receivable [Member]	Accounts Receivable [Member]
	Customer One [Member]	Customer One [Member]	Customer One [Member]	Customer Two [Member]
Concentration Risk [Line Items]	'	'	'	'
Concentration risk, percentage, period	33.00%	20.00%	'	'
Concentration risk, percentage	'	'	16.00%	15.00%

Condensed_Consolidating_Financ2

Condensed Consolidating Financial Statements Balance Sheet (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Current assets	'	'	'	'
Cash and cash equivalents	$684,715	$387,241	$311,356	$370,776
Restricted cash	32,222	32,220	'	'
Accounts receivable, net	1,131,425	959,586	'	'
Rebates receivable	668,053	305,955	'	'
Other current assets	152,790	152,673	'	'
Intercompany receivable	0	0	'	'
Total current assets	2,669,205	1,837,675	'	'
Property and equipment, net	191,304	197,007	'	'
Goodwill	4,722,555	4,720,275	'	'
Other intangible assets, net	1,126,433	1,181,419	'	'
Investment in subsidiaries	0	0	'	'
Other long-term assets	84,976	59,387	'	'
Total assets	8,794,473	7,995,763	7,296,794	'
Current liabilities	'	'	'	'
Accounts payable	962,039	817,805	'	'
Accrued expenses and other current liabilities	295,545	254,100	'	'
Rebates payable	718,900	356,265	'	'
Current portion - long-term debt	56,250	50,000	'	'
Intercompany payable	0	0	'	'
Total current liabilities	2,032,734	1,478,170	'	'
Deferred income taxes	291,361	301,341	'	'
Long-term debt	1,396,661	1,215,363	'	'
Other long-term liabilities	86,930	89,391	'	'
Total liabilities	3,807,686	3,084,265	'	'
Commitments and contingencies (Note 10)	'	'	'	'
Shareholders’ equity	'	'	'	'
Total shareholders' equity	4,984,879	4,908,490	'	'
Non-controlling interest	1,908	3,008	'	'
Total equity	4,986,787	4,911,498	4,677,149	4,609,861
Total liabilities and equity	8,794,473	7,995,763	'	'
Reportable Legal Entities [Member] | Catamaran Corporation [Member]	'	'	'	'
Current assets	'	'	'	'
Cash and cash equivalents	201,288	15,090	5,572	33,603
Restricted cash	0	0	'	'
Accounts receivable, net	0	194	'	'
Rebates receivable	45,264	35,777	'	'
Other current assets	50	107	'	'
Intercompany receivable	126,874	130,743	'	'
Total current assets	373,476	181,911	'	'
Property and equipment, net	73	69	'	'
Goodwill	0	0	'	'
Other intangible assets, net	0	0	'	'
Investment in subsidiaries	6,053,157	5,980,865	'	'
Other long-term assets	16,591	15,674	'	'
Total assets	6,443,297	6,178,519	'	'
Current liabilities	'	'	'	'
Accounts payable	0	0	'	'
Accrued expenses and other current liabilities	3,649	2,947	'	'
Rebates payable	0	0	'	'
Current portion - long-term debt	56,250	50,000	'	'
Intercompany payable	0	0	'	'
Total current liabilities	59,899	52,947	'	'
Deferred income taxes	0	0	'	'
Long-term debt	1,396,661	1,215,363	'	'
Other long-term liabilities	1,858	1,719	'	'
Total liabilities	1,458,418	1,270,029	'	'
Commitments and contingencies (Note 10)	'	'	'	'
Shareholders’ equity	'	'	'	'
Total shareholders' equity	4,984,879	4,908,490	'	'
Non-controlling interest	0	0	'	'
Total equity	4,984,879	4,908,490	'	'
Total liabilities and equity	6,443,297	6,178,519	'	'
Reportable Legal Entities [Member] | Guarantors [Member]	'	'	'	'
Current assets	'	'	'	'
Cash and cash equivalents	446,612	350,889	270,425	303,832
Restricted cash	27,386	27,384	'	'
Accounts receivable, net	907,326	954,006	'	'
Rebates receivable	996,215	473,924	'	'
Other current assets	112,608	114,808	'	'
Intercompany receivable	107,889	0	'	'
Total current assets	2,598,036	1,921,011	'	'
Property and equipment, net	159,088	188,676	'	'
Goodwill	4,639,090	4,636,810	'	'
Other intangible assets, net	1,106,867	1,160,205	'	'
Investment in subsidiaries	112,590	105,947	'	'
Other long-term assets	47,786	30,144	'	'
Total assets	8,663,457	8,042,793	'	'
Current liabilities	'	'	'	'
Accounts payable	1,016,210	840,055	'	'
Accrued expenses and other current liabilities	259,708	200,071	'	'
Rebates payable	1,158,134	612,173	'	'
Current portion - long-term debt	0	0	'	'
Intercompany payable	0	232,124	'	'
Total current liabilities	2,434,052	1,884,423	'	'
Deferred income taxes	286,060	296,040	'	'
Long-term debt	0	0	'	'
Other long-term liabilities	61,625	86,600	'	'
Total liabilities	2,781,737	2,267,063	'	'
Commitments and contingencies (Note 10)	'	'	'	'
Shareholders’ equity	'	'	'	'
Total shareholders' equity	5,881,720	5,775,730	'	'
Non-controlling interest	0	0	'	'
Total equity	5,881,720	5,775,730	'	'
Total liabilities and equity	8,663,457	8,042,793	'	'
Reportable Legal Entities [Member] | Non-Guarantors [Member]	'	'	'	'
Current assets	'	'	'	'
Cash and cash equivalents	36,815	21,262	35,359	33,341
Restricted cash	4,836	4,836	'	'
Accounts receivable, net	328,755	61,319	'	'
Rebates receivable	110,220	92,227	'	'
Other current assets	40,132	16,785	'	'
Intercompany receivable	0	125,888	'	'
Total current assets	520,758	322,317	'	'
Property and equipment, net	32,143	8,262	'	'
Goodwill	83,465	83,465	'	'
Other intangible assets, net	19,566	21,214	'	'
Investment in subsidiaries	37,071	0	'	'
Other long-term assets	22,023	59,932	'	'
Total assets	715,026	495,190	'	'
Current liabilities	'	'	'	'
Accounts payable	72,835	37,251	'	'
Accrued expenses and other current liabilities	32,188	28,403	'	'
Rebates payable	44,412	40,065	'	'
Current portion - long-term debt	0	0	'	'
Intercompany payable	200,819	0	'	'
Total current liabilities	350,254	105,719	'	'
Deferred income taxes	5,301	5,301	'	'
Long-term debt	0	0	'	'
Other long-term liabilities	23,447	23,651	'	'
Total liabilities	379,002	134,671	'	'
Commitments and contingencies (Note 10)	'	'	'	'
Shareholders’ equity	'	'	'	'
Total shareholders' equity	334,779	359,274	'	'
Non-controlling interest	1,245	1,245	'	'
Total equity	336,024	360,519	'	'
Total liabilities and equity	715,026	495,190	'	'
Consolidations [Member]	'	'	'	'
Current assets	'	'	'	'
Cash and cash equivalents	0	0	0	0
Restricted cash	0	0	'	'
Accounts receivable, net	-104,656	-55,933	'	'
Rebates receivable	-483,646	-295,973	'	'
Other current assets	0	20,973	'	'
Intercompany receivable	-234,763	-256,631	'	'
Total current assets	-823,065	-587,564	'	'
Property and equipment, net	0	0	'	'
Goodwill	0	0	'	'
Other intangible assets, net	0	0	'	'
Investment in subsidiaries	-6,202,818	-6,086,812	'	'
Other long-term assets	-1,424	-46,363	'	'
Total assets	-7,027,307	-6,720,739	'	'
Current liabilities	'	'	'	'
Accounts payable	-127,006	-59,501	'	'
Accrued expenses and other current liabilities	0	22,679	'	'
Rebates payable	-483,646	-295,973	'	'
Current portion - long-term debt	0	0	'	'
Intercompany payable	-200,819	-232,124	'	'
Total current liabilities	-811,471	-564,919	'	'
Deferred income taxes	0	0	'	'
Long-term debt	0	0	'	'
Other long-term liabilities	0	-22,579	'	'
Total liabilities	-811,471	-587,498	'	'
Commitments and contingencies (Note 10)	'	'	'	'
Shareholders’ equity	'	'	'	'
Total shareholders' equity	-6,216,499	-6,135,004	'	'
Non-controlling interest	663	1,763	'	'
Total equity	-6,215,836	-6,133,241	'	'
Total liabilities and equity	($7,027,307)	($6,720,739)	'	'

Condensed_Consolidating_Financ3

Condensed Consolidating Financial Statements Income Statement (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Condensed Income Statements, Captions [Line Items]	'	'
Revenue	$4,914,479	$3,219,716
Cost of revenue	4,599,817	2,971,344
Gross profit	314,662	248,372
Expenses:	'	'
Selling, general and administrative	130,519	100,495
Depreciation of property and equipment	12,368	6,970
Amortization of intangible assets	54,986	50,056
Operating Expenses	197,873	157,521
Operating income	116,789	90,851
Interest and other (income) expense, net	11,336	11,039
Equity in (income) in subsidiaries	0	0
Income before income taxes	105,453	79,812
Income tax expense	28,108	23,028
Net income	77,345	56,784
Less: Net income attributable to non-controlling interest	13,900	5,376
Net income attributable to the Company	63,445	51,408
Reportable Legal Entities [Member] | Catamaran Corporation [Member]	'	'
Condensed Income Statements, Captions [Line Items]	'	'
Revenue	11,041	7,913
Cost of revenue	9,594	7,139
Gross profit	1,447	774
Expenses:	'	'
Selling, general and administrative	319	314
Depreciation of property and equipment	9	9
Amortization of intangible assets	0	0
Operating Expenses	328	323
Operating income	1,119	451
Interest and other (income) expense, net	9,966	-15,052
Equity in (income) in subsidiaries	-72,292	-35,904
Income before income taxes	63,445	51,407
Income tax expense	0	0
Net income	63,445	51,407
Less: Net income attributable to non-controlling interest	0	0
Net income attributable to the Company	63,445	51,407
Reportable Legal Entities [Member] | Guarantors [Member]	'	'
Condensed Income Statements, Captions [Line Items]	'	'
Revenue	4,577,654	2,865,980
Cost of revenue	4,339,549	2,668,224
Gross profit	238,105	197,756
Expenses:	'	'
Selling, general and administrative	101,330	81,962
Depreciation of property and equipment	11,238	6,269
Amortization of intangible assets	53,339	48,422
Operating Expenses	165,907	136,653
Operating income	72,198	61,103
Interest and other (income) expense, net	778	25,538
Equity in (income) in subsidiaries	-17,402	-14,169
Income before income taxes	88,822	49,734
Income tax expense	16,530	13,830
Net income	72,292	35,904
Less: Net income attributable to non-controlling interest	0	0
Net income attributable to the Company	72,292	35,904
Reportable Legal Entities [Member] | Non-Guarantors [Member]	'	'
Condensed Income Statements, Captions [Line Items]	'	'
Revenue	697,416	466,834
Cost of revenue	622,306	416,992
Gross profit	75,110	49,842
Expenses:	'	'
Selling, general and administrative	28,870	18,219
Depreciation of property and equipment	1,121	692
Amortization of intangible assets	1,647	1,634
Operating Expenses	31,638	20,545
Operating income	43,472	29,297
Interest and other (income) expense, net	592	553
Equity in (income) in subsidiaries	0	0
Income before income taxes	42,880	28,744
Income tax expense	11,578	9,198
Net income	31,302	19,546
Less: Net income attributable to non-controlling interest	0	0
Net income attributable to the Company	31,302	19,546
Consolidations [Member]	'	'
Condensed Income Statements, Captions [Line Items]	'	'
Revenue	-371,632	-121,011
Cost of revenue	-371,632	-121,011
Gross profit	0	0
Expenses:	'	'
Selling, general and administrative	0	0
Depreciation of property and equipment	0	0
Amortization of intangible assets	0	0
Operating Expenses	0	0
Operating income	0	0
Interest and other (income) expense, net	0	0
Equity in (income) in subsidiaries	89,694	50,073
Income before income taxes	-89,694	-50,073
Income tax expense	0	0
Net income	-89,694	-50,073
Less: Net income attributable to non-controlling interest	13,900	5,376
Net income attributable to the Company	($103,594)	($55,449)

Condensed_Consolidating_Financ4

Condensed Consolidating Financial Statements Cash Flows (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities:	'	'
Net cash provided (used) by operating activities	$135,676	$63,305
Cash flows from investing activities:	'	'
Acquisitions, net of cash acquired	-2,026	0
Purchases of property and equipment	-12,782	-25,243
Proceeds from restricted cash	0	20,004
Net cash used by investing activities	-14,808	-5,239
Cash flows from financing activities:	'	'
Proceeds from issuance of debt	492,500	0
Repayment of long-term debt	-306,250	-100,000
Payment of financing costs	-955	0
Proceeds from exercise of options	3,567	785
Tax benefit on option exercises	2,692	4,928
Payments of contingent consideration	'	-23,203
Net transactions with parent and affiliates	0	0
Distributions to non-controlling interest	-15,000	0
Proceeds from restricted stock	0	0
Net cash (used) provided by financing activities	176,554	-117,490
Effect of foreign exchange on cash balances	52	4
Change in cash and cash equivalents	297,474	-59,420
Cash and cash equivalents, beginning of period	387,241	370,776
Cash and cash equivalents, end of period	684,715	311,356
Reportable Legal Entities [Member] | Catamaran Corporation [Member]	'	'
Cash flows from operating activities:	'	'
Net cash provided (used) by operating activities	43,878	37,310
Cash flows from investing activities:	'	'
Acquisitions, net of cash acquired	0	'
Purchases of property and equipment	-13	0
Proceeds from restricted cash	'	0
Net cash used by investing activities	-13	0
Cash flows from financing activities:	'	'
Proceeds from issuance of debt	492,500	'
Repayment of long-term debt	-306,250	-100,000
Payment of financing costs	-955	'
Proceeds from exercise of options	5,070	1,117
Tax benefit on option exercises	0	0
Payments of contingent consideration	'	0
Net transactions with parent and affiliates	-66,269	12,779
Distributions to non-controlling interest	0	'
Proceeds from restricted stock	18,185	20,759
Net cash (used) provided by financing activities	142,281	-65,345
Effect of foreign exchange on cash balances	52	4
Change in cash and cash equivalents	186,198	-28,031
Cash and cash equivalents, beginning of period	15,090	33,603
Cash and cash equivalents, end of period	201,288	5,572
Reportable Legal Entities [Member] | Guarantors [Member]	'	'
Cash flows from operating activities:	'	'
Net cash provided (used) by operating activities	419,040	82,038
Cash flows from investing activities:	'	'
Acquisitions, net of cash acquired	-2,026	'
Purchases of property and equipment	-4,833	-25,243
Proceeds from restricted cash	'	20,004
Net cash used by investing activities	-6,859	-5,239
Cash flows from financing activities:	'	'
Proceeds from issuance of debt	0	'
Repayment of long-term debt	0	0
Payment of financing costs	0	'
Proceeds from exercise of options	-1,503	-325
Tax benefit on option exercises	2,692	4,924
Payments of contingent consideration	'	-18,338
Net transactions with parent and affiliates	-299,906	-75,992
Distributions to non-controlling interest	0	'
Proceeds from restricted stock	-17,741	-20,475
Net cash (used) provided by financing activities	-316,458	-110,206
Effect of foreign exchange on cash balances	0	0
Change in cash and cash equivalents	95,723	-33,407
Cash and cash equivalents, beginning of period	350,889	303,832
Cash and cash equivalents, end of period	446,612	270,425
Reportable Legal Entities [Member] | Non-Guarantors [Member]	'	'
Cash flows from operating activities:	'	'
Net cash provided (used) by operating activities	-194,699	606
Cash flows from investing activities:	'	'
Acquisitions, net of cash acquired	0	'
Purchases of property and equipment	-7,936	0
Proceeds from restricted cash	'	0
Net cash used by investing activities	-7,936	0
Cash flows from financing activities:	'	'
Proceeds from issuance of debt	0	'
Repayment of long-term debt	0	0
Payment of financing costs	0	'
Proceeds from exercise of options	0	-7
Tax benefit on option exercises	0	4
Payments of contingent consideration	'	-4,865
Net transactions with parent and affiliates	233,632	6,564
Distributions to non-controlling interest	-15,000	'
Proceeds from restricted stock	-444	-284
Net cash (used) provided by financing activities	218,188	1,412
Effect of foreign exchange on cash balances	0	0
Change in cash and cash equivalents	15,553	2,018
Cash and cash equivalents, beginning of period	21,262	33,341
Cash and cash equivalents, end of period	36,815	35,359
Consolidations [Member]	'	'
Cash flows from operating activities:	'	'
Net cash provided (used) by operating activities	-132,543	-56,649
Cash flows from investing activities:	'	'
Acquisitions, net of cash acquired	0	'
Purchases of property and equipment	0	0
Proceeds from restricted cash	'	0
Net cash used by investing activities	0	0
Cash flows from financing activities:	'	'
Proceeds from issuance of debt	0	'
Repayment of long-term debt	0	0
Payment of financing costs	0	'
Proceeds from exercise of options	0	0
Tax benefit on option exercises	0	0
Payments of contingent consideration	'	0
Net transactions with parent and affiliates	132,543	56,649
Distributions to non-controlling interest	0	'
Proceeds from restricted stock	0	0
Net cash (used) provided by financing activities	132,543	56,649
Effect of foreign exchange on cash balances	0	0
Change in cash and cash equivalents	0	0
Cash and cash equivalents, beginning of period	0	0
Cash and cash equivalents, end of period	$0	$0