Molina Healthcare (MOH) 10-Q 1 May 14 2014 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Apr. 25, 2014
Document and Entity Information [Abstract]	'	'
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	'moh	'
Entity Registrant Name	'MOLINA HEALTHCARE INC	'
Entity Central Index Key	'0001179929	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	46,264

CONSOLIDATED_BALANCE_SHEETS_Un

CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$1,083,369	$935,895
Investments	696,200	703,052
Receivables	338,232	298,935
Income taxes refundable	28,100	32,742
Deferred income taxes	22,414	26,556
Prepaid expenses and other current assets	112,916	42,484
Total current assets	2,281,231	2,039,664
Property, equipment, and capitalized software, net	310,364	292,083
Deferred contract costs	44,740	45,675
Intangible assets, net	93,587	98,871
Goodwill	230,738	230,738
Restricted investments	82,036	63,093
Auction rate securities	10,928	10,898
Deferred income taxes	3,510	0
Derivative asset	196,617	186,351
Other assets	39,730	35,564
Total Assets	3,293,481	3,002,937
Current liabilities:	'	'
Medical claims and benefits payable	819,541	669,787
Accounts payable and accrued liabilities	406,414	319,965
Deferred revenue	146,276	122,216
Current maturities of long-term debt	183,713	182,008
Total current liabilities	1,555,944	1,293,976
Convertible senior notes	421,004	416,368
Lease financing obligations	159,754	159,394
Lease financing obligations – related party	34,820	27,092
Deferred income taxes	0	580
Derivative liability	196,503	186,239
Other long-term liabilities	27,736	26,351
Total liabilities	2,395,761	2,110,000
Stockholders’ equity:	'	'
Common stock, $0.001 par value; 150,000 shares authorized; outstanding: 46,263 shares at March 31, 2014 and 45,871 shares at December 31, 2013	46	46
Preferred stock, $0.001 par value; 20,000 shares authorized, no shares issued and outstanding	0	0
Additional paid-in capital	340,429	340,848
Accumulated other comprehensive loss	-382	-1,086
Retained earnings	557,627	553,129
Total stockholders’ equity	897,720	892,937
Total liabilities and stockholders' equity	$3,293,481	$3,002,937

CONSOLIDATED_BALANCE_SHEETS_Un1

CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]	'	'
Common stock, par value	$0.00	$0.00
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares outstanding	46,263,000	45,871,000
Preferred stock, par value	$0.00	$0.00
Preferred stock, shares authorized	20,000,000	20,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0

CONSOLIDATED_STATEMENTS_OF_INC

CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Revenue:	'	'
Premium revenue	$1,940,337	$1,497,433
Service revenue	53,630	49,756
Premium tax revenue	51,693	37,000
Health insurer fee revenue	18,696	0
Investment income	1,629	1,516
Other revenue	3,258	4,694
Total revenue	2,069,243	1,590,399
Operating expenses:	'	'
Medical care costs	1,721,658	1,287,915
Cost of service revenue	40,657	39,770
General and administrative expenses	188,087	141,278
Premium tax expenses	51,693	37,000
Health insurer fee expenses	22,190	0
Depreciation and amortization	20,691	16,563
Total operating expenses	2,044,976	1,522,526
Operating income	24,267	67,873
Other expenses, net:	'	'
Interest expense	13,822	13,037
Other income, net	-44	-131
Total other expenses, net	13,778	12,906
Income from continuing operations before income tax expense	10,489	54,967
Income tax expense	5,655	24,445
Income from continuing operations	4,834	30,522
Loss from discontinued operations, net of tax	-336	-607
Net income	$4,498	$29,915
Basic net income (loss) per share:	'	'
Continuing operations	$0.11	$0.66
Discontinued operations	($0.01)	($0.01)
Basic net income per share	$0.10	$0.65
Diluted net income (loss) per share:	'	'
Continuing operations	$0.10	$0.65
Discontinued operations	($0.01)	($0.01)
Diluted net income per share	$0.09	$0.64

CONSOLIDATED_STATEMENTS_OF_COM

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Statement of Partners' Capital [Abstract]	'	'
Net income	$4,498	$29,915
Other comprehensive income:	'	'
Gross unrealized investment gains	1,426	419
Effect of income tax expense	722	159
Other comprehensive income, net of tax	704	260
Comprehensive income	$5,202	$30,175

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Operating activities:	'	'
Net income	$4,498	$29,915
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Depreciation and amortization	32,994	21,799
Deferred income taxes	-670	-16
Stock–based compensation	5,596	4,421
Amortization of convertible senior notes and lease financing obligations	6,674	3,723
Amortization of premium/discount on investments	3,023	1,502
Amortization of deferred financing costs	651	1,248
Gain on derivatives, net	-2	-119
Change in fair value of contingent consideration liabilities	-4,265	0
Gain on disposal of property and equipment, net	-950	0
Tax deficiency from employee stock compensation	-5	-42
Changes in operating assets and liabilities:	'	'
Receivables	-39,297	-569
Prepaid expenses and other assets	-78,023	-8,956
Medical claims and benefits payable	149,754	-3,385
Accounts payable and accrued liabilities	102,217	-31,847
Deferred revenue	24,060	-5,994
Income taxes	4,642	8,424
Net cash provided by operating activities	210,897	20,104
Investing activities:	'	'
Purchases of investments	-142,145	-76,012
Sales and maturities of investments	147,370	75,647
Purchases of equipment	-17,788	-11,167
Increase in restricted investments	-14,381	-11,016
Sale of property and equipment	5,715	0
Change in deferred contract costs	-6,145	1,756
Change in other noncurrent assets and liabilities	-117	-408
Net cash used in investing activities	-27,491	-21,200
Financing activities:	'	'
Proceeds from issuance of 1.125% Notes, net of deferred financing costs	0	537,973
Purchase of 1.125% Notes call option	0	-149,331
Proceeds from issuance of warrants	0	75,074
Treasury stock purchases	0	-50,000
Principal payments on term loan	0	-291
Repayment of amounts borrowed under credit facility	0	-40,000
Contingent consideration liabilities settled	-38,119	0
Proceeds from employee stock plans	1,330	235
Excess tax benefits from employee stock compensation	877	1,177
Principal payments on lease financing obligations	-20	0
Net cash (used in) provided by financing activities	-35,932	374,837
Net increase in cash and cash equivalents	147,474	373,741
Cash and cash equivalents at beginning of period	935,895	795,770
Cash and cash equivalents at end of period	1,083,369	1,169,511
Supplemental cash flow information:	'	'
Income taxes	481	14,712
Interest	6,388	17,065
Schedule of non-cash investing and financing activities:	'	'
Retirement of treasury stock	0	53,000
Common stock used for stock-based compensation	8,217	4,644
Non-cash lease financing obligation – related party	7,775	0
Details of gain (loss) on derivatives:	'	'
Gain (loss) on derivatives, net	2	119
Gain (loss) on 1.125% Call Option	'	'
Details of gain (loss) on derivatives:	'	'
Gain (loss) on derivatives, net	10,266	-1,946
(Loss) gain on embedded cash conversion option	'	'
Details of gain (loss) on derivatives:	'	'
Gain (loss) on derivatives, net	-10,264	2,022
Gain on interest rate swap	'	'
Details of gain (loss) on derivatives:	'	'
Gain (loss) on derivatives, net	$0	$43

Basis_of_Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Basis of Presentation	'
	Basis of Presentation
	Organization and Operations
	Molina Healthcare, Inc. provides quality and cost-effective Medicaid-related solutions to meet the health care needs of low-income families and individuals, and to assist state agencies in their administration of the Medicaid program. We report our financial performance based on two reportable segments: the Health Plans segment and the Molina Medicaid Solutions segment.
	Our Health Plans segment consists of health plans in 11 states, and includes our direct delivery business. As of March 31, 2014, these health plans served approximately 2.2 million members eligible for Medicaid, Medicare, and other government-sponsored health care programs for low-income families and individuals. Additionally, we serve a small number of Health Insurance Marketplaces members, many of whom are eligible for government premium subsidies. The health plans are operated by our respective wholly owned subsidiaries in those states, each of which is licensed as a health maintenance organization (HMO). Our direct delivery business consists primarily of the operation of primary care clinics in California.
	Our Molina Medicaid Solutions segment provides business processing and information technology development and administrative services to Medicaid agencies in Idaho, Louisiana, Maine, New Jersey, West Virginia, and the U.S. Virgin Islands, and drug rebate administration services in Florida.
	We previously reported that our Medicaid managed care contract with the state of Missouri expired without renewal in 2012, and effective June 2013 the transition obligations associated with that contract terminated. Therefore, beginning in the second quarter of 2013, we classified the operations for our Missouri health plan as discontinued operations for all periods presented in our consolidated financial statements.
	Consolidation and Interim Financial Information
	The consolidated financial statements include the accounts of Molina Healthcare, Inc., its subsidiaries and variable interest entities in which Molina Healthcare, Inc. is considered to be the primary beneficiary. Such variable interest entities are insignificant to our consolidated financial position and results of operations. In the opinion of management, all adjustments considered necessary for a fair presentation of the results as of the date and for the interim periods presented have been included; such adjustments consist of normal recurring adjustments. All significant intercompany balances and transactions have been eliminated. The consolidated results of operations for the current interim period are not necessarily indicative of the results for the entire year ending December 31, 2014.
	The unaudited consolidated interim financial statements have been prepared under the assumption that users of the interim financial data have either read or have access to our audited consolidated financial statements for the fiscal year ended December 31, 2013. Accordingly, certain disclosures that would substantially duplicate the disclosures contained in the December 31, 2013 audited consolidated financial statements have been omitted. These unaudited consolidated interim financial statements should be read in conjunction with our December 31, 2013 audited consolidated financial statements.
	Reclassifications
	We have reclassified certain amounts in the 2013 consolidated statements of income to conform to the 2014 presentation.

Significant_Accounting_Policie

Significant Accounting Policies	3 Months Ended
	Mar. 31, 2014
Accounting Policies [Abstract]	'
Significant Accounting Policies	'
	Significant Accounting Policies
	Revenue Recognition
	Premium Revenue – Health Plans Segment
	Premium revenue is fixed in advance of the periods covered and, except as described below, is not generally subject to significant accounting estimates. Premium revenues are recognized in the month that members are entitled to receive health care services.
	Certain components of premium revenue are subject to accounting estimates and fall into two categories:
	-1	Contractual provisions with revenue or profit limits:
	Health Plan Medical Cost Floors (Minimums), Medical Cost Corridors, and Administrative Cost Ceilings (Maximums): A portion of certain Medicaid premiums received by our California, Florida, Illinois, New Mexico, and Washington health plans may be returned to the state if certain minimum amounts are not spent on defined medical care costs. In some cases, the health plans may receive additional premiums if amounts spent on medical care costs exceed a defined maximum threshold. Additionally, all of our health plans with Medicare and Health Insurance Marketplaces membership are required to spend certain minimum amounts on defined medical care costs. In the aggregate, we recorded a liability under the terms of such contract provisions of $2.0 million and $1.4 million at March 31, 2014, and December 31, 2013, respectively. In Michigan and Ohio, the state may levy non-monetary sanctions on us if certain minimum amounts are not spent on defined medical care costs, or if administrative costs exceed certain amounts.
	Health Plan Profit Sharing and Profit Ceiling: Our contracts with the states of New Mexico, Texas, and Washington contain profit-sharing or profit ceiling provisions under which we refund amounts to the states if our health plans generate profit above a certain specified percentage, in some cases in accordance with a tiered rebate schedule. In some cases, we are limited in the amount of administrative costs that we may deduct in calculating the refund, if any. As a result of profits in excess of the amount we are allowed to fully retain, we recorded a liability of $11.1 million and $2.5 million at March 31, 2014 and December 31, 2013, respectively.
	Medicare Revenue Risk Adjustment: Based on member encounter data that we submit to CMS (the Centers for Medicare and Medicaid Services), our Medicare premiums are subject to retroactive adjustment for both member risk scores and member pharmacy cost experience for up to two years after the original year of service. This adjustment takes into account the acuity of each member’s medical needs relative to what was anticipated when premiums were originally set for that member. In the event that a member requires less acute medical care than was anticipated by the original premium amount, CMS may recover premium from us. In the event that a member requires more acute medical care than was anticipated by the original premium amount, CMS may pay us additional retroactive premium. A similar retroactive reconciliation is undertaken by CMS for our Medicare members’ pharmacy utilization. We estimate the amount of Medicare revenue that will ultimately be realized for the periods presented based on our knowledge of our members’ health care utilization patterns and CMS practices. Based on our knowledge of member health care utilization patterns and expenses we have recorded a net receivable of $33.4 million and $20.8 million for anticipated Medicare risk adjustment premiums at March 31, 2014 and December 31, 2013, respectively.
	-2	Quality incentives:
	At our Illinois, New Mexico, Ohio, Texas, Washington and Wisconsin health plans, revenue ranging from approximately 1.00% to 5.00% of health plan premiums is earned if certain performance measures are met.
	The following table quantifies the quality incentive premium revenue recognized for the periods presented, including the amounts earned in the periods presented and prior periods. Although the reasonably possible effects of a change in estimate related to quality incentive premium revenue as of March 31, 2014 are not known, we have no reason to believe that the adjustments to prior years noted below are not indicative of the potential future changes in our estimates as of March 31, 2014.
		Three Months Ended March 31,
		2014			2013
		(In thousands)
	Maximum available quality incentive premium - current period	$	20,164		$	20,615
	Amount of quality incentive premium revenue recognized in current period:
	Earned current period	$	5,297		$	14,896
	Earned prior periods	(378		)	6,712
	Total	$	4,919		21,608
	Total premium revenue recognized for state health plans with quality incentive premiums	$	1,200,619		$	709,383
	Service Revenue and Cost of Service Revenue — Molina Medicaid Solutions Segment
	The payments received by our Molina Medicaid Solutions segment under its state contracts are based on the performance of multiple services. The first of these is the design, development and implementation (DDI) of a Medicaid management information system (MMIS). An additional service, following completion of DDI, is the operation of the MMIS under a business process outsourcing (BPO) arrangement. When providing BPO services (which include claims payment and eligibility processing) we also provide the state with other services including both hosting and support, and maintenance. Because we have determined the services provided under our Molina Medicaid Solutions contracts represent a single unit of accounting, we recognize revenue associated with such contracts on a straight-line basis over the period during which BPO, hosting, and support and maintenance services are delivered.
	Cost of service revenue consists primarily of the costs incurred to provide BPO and technology outsourcing services under our MMIS contracts. General and administrative costs consist primarily of indirect administrative costs and business development costs. In some circumstances we may defer recognition of incremental direct costs (such as direct labor, hardware, and software) associated with a contract if revenue recognition is also deferred. Such deferred contract costs are amortized on a straight-line basis over the remaining original contract term, consistent with the revenue recognition period.
	Income Taxes
	The provision for income taxes is determined using an estimated annual effective tax rate, which is generally greater than the U.S. federal statutory rate primarily because of state taxes, nondeductible health insurer fee expenses, nondeductible compensation and other general and administrative expenses. The effective tax rate may be subject to fluctuations during the year as new information is obtained. Such information may affect the assumptions used to estimate the annual effective tax rate, including factors such as the mix of pretax earnings in the various tax jurisdictions in which we operate, valuation allowances against deferred tax assets, the recognition or the reversal of the recognition of tax benefits related to uncertain tax positions, and changes in or the interpretation of tax laws in jurisdictions where we conduct business. We recognize deferred tax assets and liabilities for temporary differences between the financial reporting basis and the tax basis of our assets and liabilities, along with net operating loss and tax credit carryovers.
	The total amount of unrecognized tax benefits was $2.0 million and $8.0 million as of March 31, 2014 and December 31, 2013, respectively. The unrecognized tax benefits recorded at December 31, 2013 decreased by $6.0 million during the quarter ending March 31, 2014 as a result of executing a settlement agreement with a state. The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate was $1.8 million and $5.7 million as of March 31, 2014 and December 31, 2013, respectively. We expect that during the next 12 months it is reasonably possible that unrecognized tax benefit liabilities may decrease by as much as $0.2 million due to the expiration of statute of limitations.
	Our continuing practice is to recognize interest and/or penalties related to unrecognized tax benefits in income tax expense. As of March 31, 2014 and December 31, 2013, we had accrued $0.07 million and $0.08 million, respectively, for the payment of interest and penalties.
	During the three months ended March 31, 2014 and 2013, we recognized tax benefits related to discontinued operations of $0.4 million and $0.2 million, respectively.
	New Accounting Standards
	Health Insurer Fee. In the first quarter of 2014, we adopted the guidance of the Financial Accounting Standards Board (FASB) related to accounting for the fees to be paid by health insurers to the federal government under the Patient Protection and Affordable Care Act and the Health Care and Education Reconciliation Act of 2010 (collectively, the Affordable Care Act, or ACA). The ACA imposes an annual fee, or excise tax, on health insurers for each calendar year beginning on or after January 1, 2014. The health insurer fee (HIF) is imposed beginning in 2014 based on a company's share of the industry's net premiums written during the preceding calendar year, and is payable on September 30 of each year.
	Effective January 1, 2014, we recorded our estimate of the 2014 liability to accounts payable and accrued liabilities, amounting to $88.8 million. We are amortizing this liability on a straight-line basis in 2014, and recorded $22.2 million to health insurer fee expenses in the first quarter of 2014. As enacted, this federal premium-based assessment is non-deductible for income tax purposes.
	Income Taxes. In the first quarter of 2014, we adopted the FASB's guidance for the presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists. The new guidance states that an unrecognized tax benefit, or a portion of an unrecognized tax benefit, should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward. The adoption of this new guidance did not impact our consolidated financial position, results of operations or cash flows.
	Other recent accounting pronouncements issued by the FASB (including its Emerging Issues Task Force), the American Institute of Certified Public Accountants, and the Securities and Exchange Commission did not have, or are not believed by management to have, a material impact on our present or future consolidated financial statements.

Net_Income_Per_Share

Net Income Per Share	3 Months Ended
	Mar. 31, 2014
Earnings Per Share [Abstract]	'
Net Income per Share	'
	Net Income per Share
	The following table sets forth the calculation of the denominators used to compute basic and diluted net income per share:
		Three Months Ended March 31,
		2014	2013
		(In thousands)
	Shares outstanding at the beginning of the period	45,871	46,762
	Weighted-average number of shares repurchased	—	(867	)
	Weighted-average number of shares issued	150	86
	Denominator for basic net income per share	46,021	45,981
	Dilutive effect of employee restricted stock awards and stock options	597	462
	Dilutive effect of 3.75% Notes (1)	902	—
	Denominator for diluted net income per share	47,520	46,443
	Potentially dilutive amounts excluded from calculations (1),(2):
	Restricted stock awards	192	203
	Stock options	45	26
	1.125% Warrants	13,490	7,345
	______________________________
	-1	Potentially dilutive shares issuable pursuant to our 3.75% Notes (defined in Note 11, "Long-Term Debt") were not included in the computation of diluted net income per share for the three months ended March 31, 2013, because to do so would have been anti-dilutive. Potentially dilutive shares issuable pursuant to our 1.125% Warrants (defined in Note 12, "Derivative Financial Instruments") were not included in the computation of diluted net income per share for the three months ended March 31, 2014 and 2013 because to do so would have been anti-dilutive.
	-2	Unvested restricted shares are included in the calculation of diluted net income per share when their grant date fair values are below the average fair value of the common shares for each of the periods presented. Options to purchase common shares are included in the calculation of diluted net income per share when their exercise prices are below the average fair value of the common shares for each of the periods presented.

Business_Combinations

Business Combinations	3 Months Ended
	Mar. 31, 2014
Business Combinations [Abstract]	'
Business Combinations	'
	Business Combinations
	Health Plans Segment
	South Carolina. In July 2013, we entered into an agreement with Community Health Solutions of America, Inc. (CHS) to acquire certain assets, including the rights to convert certain of CHS’ Medicaid members covered by South Carolina’s full-risk Medicaid managed care program. The conversion conditions under the agreement were satisfied by January 1, 2014, and on that date such Medicaid members were converted to the managed care program and enrolled with our South Carolina health plan. In January 2014 we made an interim payment of $38.1 million according to the terms of the agreement, which included indemnification withhold funds transferred to restricted investments amounting to $4.6 million. Such indemnification funds will become unrestricted on the one-year anniversary date of the conversion, or January 1, 2015.
	Because the number of Medicaid members we would ultimately convert was unknown as of the acquisition date in 2013, we have recorded a contingent consideration liability for such members we expect to enroll through the final purchase price determination date in the second quarter of 2014. We have also recorded a contingent consideration liability for dual-eligible members we may enroll in our Medicare-Medicaid Plan (MMP) implementation in South Carolina. The contingent consideration liability is remeasured to fair value at each quarter until the contingency is resolved, with fair value adjustments, if any, recorded to operations. As of March 31, 2014, the fair value of the contingent consideration liability amounted to $14.7 million. This amount reflects a reduction from the December 31, 2013 balance for the January 2014 payment noted above, and for the fair value adjustment measured as of March 31, 2014. The fair value adjustment resulted in a decrease to the liability of $2.7 million, with a corresponding gain recorded to operations. On April 17, 2014, we paid $11.6 million, including indemnification withhold funds transferred to restricted investments, in satisfaction of the final purchase price determination relating to the converted Medicaid membership.
	New Mexico. In August 2013, our New Mexico health plan acquired the Lovelace Community Health Plan’s contract for the state of New Mexico's Medicaid program. In addition to Lovelace's Medicaid members, we also added membership previously covered under New Mexico’s State Coverage Insurance (SCI) program with Lovelace. Effective January 1, 2014, these SCI members were either a) enrolled in New Mexico's Medicaid program, or b) eligible to enroll in New Mexico’s Marketplace.
	Because the number of SCI members we would ultimately retain was unknown as of the acquisition date in 2013, we have recorded a contingent consideration liability for such members we expect to enroll through the final purchase price determination date in the second quarter of 2014. As of March 31, 2014, the fair value of this contingent consideration liability amounted to $0.5 million. The fair value adjustment resulted in a decrease to the liability of $1.6 million, with a corresponding gain recorded to operations.

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
	In March 2014, our named executive officers were granted a total of 356,292 restricted shares with service, market, and performance conditions. In the event the vesting conditions are not achieved, the awards will lapse. As of March 31, 2014, we expect the market and performance conditions to be met in full.
	Charged to general and administrative expenses, total stock-based compensation expense was as follows:
		Three Months Ended March 31,
		2014			2013
		(In thousands)
	Restricted stock and performance awards	$	4,608		$	3,848
	Employee stock purchase plan and stock options	988			573
		$	5,596		$	4,421
	As of March 31, 2014, there was $37.8 million of total unrecognized compensation expense related to unvested restricted share awards, including those with performance conditions, which we expect to recognize over a remaining weighted-average period of 2.4 years. Also as of March 31, 2014, there was $0.5 million of total unrecognized compensation expense related to unvested stock options, which we expect to recognize over a weighted-average period of 1.8 years.
	Restricted and performance stock activity for the three months ended March 31, 2014 is summarized below:
		Shares		Weighted
				Average
				Grant Date
				Fair Value
	Unvested balance as of December 31, 2013	1,299,852		$	29.03
	Granted	628,936		36.46
	Vested	(561,407	)	27.46
	Forfeited	(6,125	)	27.36
	Unvested balance as of March 31, 2014	1,361,256		33.12
	The total fair value of restricted and performance awards granted during the three months ended March 31, 2014 and 2013 was $22.9 million and $19.3 million, respectively. The total fair value of restricted awards, including those with performance and market conditions, vested during the three months ended March 31, 2014 and 2013 was $20.9 million and $13.1 million, respectively.
	Stock option activity for the three months ended March 31, 2014 is summarized below:
		Options		Weighted			Aggregate		Weighted
				Average			Intrinsic		Average
				Exercise			Value		Remaining
				Price					Contractual
									term
							(In thousands)		(Years)
	Outstanding as of December 31, 2013	379,221		$	24.14
	Exercised	(51,750	)	25.69
	Outstanding as of March 31, 2014	327,471		23.9			$	4,475	3.5
	Stock options exercisable and expected to vest as of March 31, 2014	327,471		23.9			$	4,475	3.5
	Exercisable as of March 31, 2014	292,471		22.77			$	4,325	2.9

Fair_Value_Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
	Fair Value Measurements
	Our consolidated balance sheets include the following financial instruments: cash and cash equivalents, investments, receivables, other assets, trade accounts payable, medical claims and benefits payable, long-term debt, and other liabilities. We consider the carrying amounts of cash and cash equivalents, receivables, other current assets and current liabilities (excluding contingent consideration liabilities) to approximate their fair values because of the relatively short period of time between the origination of these instruments and their expected realization or payment. For our financial instruments measured at fair value on a recurring basis, we prioritize the inputs used in measuring fair value according to a three-tier fair value hierarchy as follows:
	Level 1 — Observable Inputs
	Level 1 financial instruments recorded at fair value consist of investments including government-sponsored enterprise securities (GSEs) and U.S. treasury notes that are classified as current investments in the accompanying consolidated balance sheets. These financial instruments are actively traded and therefore the fair value for these securities is based on quoted market prices on one or more securities exchanges.
	Level 2 — Directly or Indirectly Observable Inputs
	Level 2 financial instruments recorded at fair value consist of investments including corporate debt securities, municipal securities, and certificates of deposit that are classified as current investments in the accompanying consolidated balance sheets. Such investments are traded frequently though not necessarily daily. Fair value for these investments is determined using a market approach based on quoted prices for similar securities in active markets or quoted prices for identical securities in inactive markets.
	Level 3 — Unobservable Inputs
	Derivative financial instruments. Derivative financial instruments include the 1.125% Call Option derivative asset and the embedded cash conversion option derivative liability. These derivatives are not actively traded and are valued based on an option pricing model that uses observable and unobservable market data for inputs. Significant market data inputs used to determine fair value as of March 31, 2014 included our common stock price, time to maturity of the derivative instruments, the risk-free interest rate, and the implied volatility of our common stock. As described further in Note 12, “Derivative Financial Instruments,” the 1.125% Call Option asset and the embedded cash conversion option liability were designed such that changes in their fair values would offset, with minimal impact to the consolidated statements of income. Therefore, the sensitivity of changes in the unobservable inputs to the option pricing model for such instruments is mitigated.
	Contingent consideration liabilities. Such liabilities primarily relate to our South Carolina health plan acquisition described in Note 4, "Business Combinations," and are recorded in accounts payable and accrued liabilities. We applied discounted cash flow analysis to determine the fair value of the contingent consideration liabilities. Significant unobservable inputs primarily related to the probability weighted present values of the purchase price estimates for the projected membership.
	Auction rate securities. Auction rate securities are designated as available-for-sale and are reported at fair value. To estimate the fair value of these securities we use valuation data from our primary pricing source, a third party who provides a marketplace for illiquid assets with over 10,000 participants. This valuation data is based on a range of prices that represent indicative bids from potential buyers. To validate the reasonableness of the data, we compare these valuations to data from other third-party pricing sources, which also provide a range of prices representing indicative bids from potential buyers. We have concluded that these estimates, given the lack of market available pricing, provide a reasonable basis for determining the fair value of the auction rate securities as of March 31, 2014.
	Our financial instruments measured at fair value on a recurring basis at March 31, 2014, were as follows:
		Total		Level 1		Level 2			Level 3
		(In thousands)
	Corporate debt securities	$	451,682	$	—	$	451,682		$	—
	Municipal securities	99,748		—		99,748			—
	GSEs	69,326		69,326		—			—
	U.S. treasury notes	35,035		35,035		—			—
	Certificates of deposit	40,409		—		40,409			—
	Auction rate securities	10,928		—		—			10,928
	1.125% Call Option derivative asset	196,617		—		—			196,617
	Total assets measured at fair value on a recurring basis	$	903,745	$	104,361	$	591,839		$	207,545
	Embedded cash conversion option derivative liability	$	196,503	$	—	$	—		$	196,503
	Contingent consideration liabilities	15,164		—		—			15,164
	Total liabilities measured at fair value on a recurring basis	$	211,667	$	—	$	—		$	211,667
	Our financial instruments measured at fair value on a recurring basis at December 31, 2013, were as follows:
		Total		Level 1		Level 2			Level 3
		(In thousands)
	Corporate debt securities	$	449,772	$	—	$	449,772		$	—
	Municipal securities	113,330		—		113,330			—
	GSEs	68,817		68,817		—			—
	U.S. treasury notes	37,376		37,376		—			—
	Certificates of deposit	33,757		—		33,757			—
	Auction rate securities	10,898		—		—			10,898
	1.125% Call Option derivative asset	186,351		—		—			186,351
	Total assets measured at fair value on a recurring basis	$	900,301	$	106,193	$	596,859		$	197,249
	Embedded cash conversion option derivative liability	$	186,239	$	—	$	—		$	186,239
	Contingent consideration liabilities	57,548		—		—			57,548
	Total liabilities measured at fair value on a recurring basis	$	243,787	$	—	$	—		$	243,787
	The following table presents activity relating to our assets (liabilities) measured at fair value on a recurring basis using significant unobservable inputs (Level 3):
		Change in Level 3 Instruments
		Auction Rate Securities		Derivatives, Net		Contingent Consideration Liabilities
		(In thousands)
	Balance at December 31, 2013	$	10,898	$	112	$	(57,548	)
	Total gains for the period recognized in:
	General and administrative expenses	—		—		4,265
	Other expenses, net	—		2		—
	Other comprehensive income	30		—		—
	Settlements	—		—		38,119
	Balance at March 31, 2014	$	10,928	$	114	$	(15,164	)
	Fair Value Measurements – Disclosure Only
	The carrying amounts and estimated fair values of our long-term debt, as well as the applicable fair value hierarchy tiers, are contained in the tables below. Our convertible senior notes are classified as Level 2 financial instruments. Fair value for these securities is determined using a market approach based on quoted prices for similar securities in active markets or quoted prices for identical securities in inactive markets.
		31-Mar-14
		Carrying		Total		Level 1			Level 2		Level 3
		Value		Fair Value
		(In thousands)
	1.125% Notes	$	421,004	$	615,313	$	—		$	615,313	$	—
	3.75% Notes	183,549		229,075		—			229,075		—
		$	604,553	$	844,388	$	—		$	844,388	$	—
		31-Dec-13
		Carrying		Total		Level 1			Level 2		Level 3
		Value		Fair Value
		(In thousands)
	1.125% Notes	$	416,368	$	572,627	$	—		$	572,627	$	—
3.75% Notes	181,872		219,491		—			219,491		—
	$	598,240	$	792,118	$	—		$	792,118	$	—

Investments

Investments	3 Months Ended
	Mar. 31, 2014
Investments, Debt and Equity Securities [Abstract]	'
Investments	'
	Investments
	The following tables summarize our investments as of the dates indicated:
		31-Mar-14
		Amortized		Gross					Estimated
				Unrealized					Fair
		Cost		Gains		Losses			Value
		(In thousands)
	Corporate debt securities	$	451,484	$	613	$	415		$	451,682
	Municipal securities	99,775		266		293			99,748
	GSEs	69,379		18		71			69,326
	U.S. treasury notes	35,004		57		26			35,035
	Certificates of deposit	40,412		5		8			40,409
	Subtotal - current investments	696,054		959		813			696,200
	Auction rate securities	11,400		—		472			10,928
		$	707,454	$	959	$	1,285		$	707,128
		31-Dec-13
		Amortized		Gross					Estimated
				Unrealized					Fair
		Cost		Gains		Losses			Value
		(In thousands)
	Corporate debt securities	$	450,162	$	442	$	832		$	449,772
	Municipal securities	114,126		119		915			113,330
	GSEs	68,898		6		87			68,817
	U.S. treasury notes	37,360		44		28			37,376
	Certificates of deposit	33,756		2		1			33,757
	Subtotal - current investments	704,302		613		1,863			703,052
	Auction rate securities	11,400		—		502			10,898
		$	715,702	$	613	$	2,365		$	713,950
	The contractual maturities of our investments as of March 31, 2014 are summarized below:
		Amortized Cost		Estimated
				Fair Value
		(In thousands)
	Due in one year or less	$	329,504	$	329,633
	Due one year through five years	366,550		366,567
	Due after ten years	11,400		10,928
		$	707,454	$	707,128
	Gross realized gains and losses from sales of available-for-sale securities are calculated under the specific identification method and are included in investment income. Net realized investment gains for the three months ended March 31, 2014 and 2013 were insignificant.
	We monitor our investments for other-than-temporary impairment. For investments other than our auction rate securities, discussed below, we have determined that unrealized gains and losses at March 31, 2014 and December 31, 2013, are temporary in nature, because the change in market value for these securities has resulted from fluctuating interest rates, rather than a deterioration of the credit worthiness of the issuers. So long as we hold these securities to maturity, we are unlikely to experience gains or losses. In the event that we dispose of these securities before maturity, we expect that realized gains or losses, if any, will be immaterial.
	The following tables segregate those available-for-sale investments that have been in a continuous loss position for less than 12 months, and those that have been in a loss position for 12 months or more as of March 31, 2014.
		In a Continuous Loss Position						In a Continuous Loss Position
		for Less than 12 Months						for 12 Months or More
		Estimated		Unrealized		Total		Estimated			Unrealized		Total
		Fair		Losses		Number of		Fair			Losses		Number of
		Value				Securities		Value					Securities
		(Dollars in thousands)
	Corporate debt securities	$	137,383	$	334	64		$	11,829		$	81	5
	Municipal securities	14,143		110		18		27,085			183		30
	GSEs	28,741		63		11		5,541			8		6
	U.S. treasury notes	8,821		26		7		—			—		—
	Certificates of deposit	10,566		8		43		—			—		—
	Auction rate securities	—		—		—		10,928			472		15
		$	199,654	$	541	143		$	55,383		$	744	56
	The following table segregates those available-for-sale investments that have been in a continuous loss position for less than 12 months, and those that have been in a loss position for 12 months or more as of December 31, 2013.
		In a Continuous Loss Position						In a Continuous Loss Position
		for Less than 12 Months						for 12 Months or More
		Estimated		Unrealized		Total		Estimated			Unrealized		Total
		Fair		Losses		Number of		Fair			Losses		Number of
		Value				Securities		Value					Securities
		(Dollars in thousands)
	Corporate debt securities	$	210,057	$	802	91		$	2,540		$	30	3
	Municipal securities	30,715		398		49		31,091			517		39
	GSEs	53,308		87		21		—			—		—
	U.S. treasury notes	12,037		28		11		—			—		—
Certificates of deposit	414		1		2		—			—		—
Auction rate securities	—		—		—		10,898			502		15
	$	306,531	$	1,316	174		$	44,529		$	1,049	57
Auction Rate Securities. Due to events in the credit markets, the auction rate securities held by us experienced failed auctions beginning in the first quarter of 2008, and such auctions have not resumed. Therefore, quoted prices in active markets have not been available since early 2008. Our investments in auction rate securities are collateralized by student loan portfolios guaranteed by the U.S. government, and the range of maturities for such securities is from 17 years to 32 years. Considering the relative insignificance of these securities when compared with our liquid assets and other sources of liquidity, we have no current intention of selling these securities nor do we expect to be required to sell these securities before a recovery in their cost basis. For this reason, and because the decline in the fair value of the auction rate securities was not due to the credit quality of the issuers, we do not consider the auction rate securities to be other-than-temporarily impaired at March 31, 2014. At the time of the first failed auctions during first quarter 2008, we held a total of $82.1 million in auction rate securities at par value; since that time, we have settled $70.7 million of these instruments at par value.
For the three months ended March 31, 2014 and 2013, we recorded pretax unrealized gains of $0.03 million and $0.3 million, respectively, to accumulated other comprehensive income for the changes in their fair value. Any future fluctuation in fair value related to these instruments that we deem to be temporary, including any recoveries of previous write-downs, would be recorded to accumulated other comprehensive income. If we determine that any future impairment was other-than-temporary, we would record a charge to earnings as appropriate.

Receivables

Receivables	3 Months Ended
	Mar. 31, 2014
Receivables [Abstract]	'
Receivables	'
	Receivables
	Receivables consist primarily of amounts due from the various states in which we operate, which may be subject to potential retroactive adjustments. Because all of our receivable amounts are readily determinable and our creditors are in almost all instances state governments, our allowance for doubtful accounts is immaterial.
		March 31,		December 31,
		2014		2013
		(In thousands)
	Health Plans segment:
	California	$	134,872	$	148,654
	Florida	3,123		2,901
	Illinois	284		5,773
	Michigan	19,446		15,253
	New Mexico	29,732		17,056
	Ohio	53,493		43,969
	South Carolina	12,612		—
	Texas	11,398		9,736
	Utah	13,700		10,953
	Washington	25,145		13,455
	Wisconsin	7,857		8,087
	Direct delivery and other	9,043		2,463
	Total Health Plans segment	320,705		278,300
	Molina Medicaid Solutions segment	17,527		20,635
		$	338,232	$	298,935

Restricted_Investments

Restricted Investments	3 Months Ended
	Mar. 31, 2014
Investments, Debt and Equity Securities [Abstract]	'
Restricted Investments	'
	Restricted Investments
	Pursuant to the regulations governing our Health Plans segment subsidiaries, we maintain statutory deposits and deposits required by state authorities in certificates of deposit and U.S. treasury securities. We also maintain restricted investments as protection against the insolvency of certain capitated providers. Additionally, in connection with the Molina Medicaid Solutions contracts with the states of Maine and Idaho, we maintain restricted investments as collateral for letters of credit. The following table presents the balances of restricted investments:
		March 31,		December 31,
		2014		2013
		(In thousands)
	California	$	373	$	373
	Florida	23,317		9,242
	Illinois	310		310
	Michigan	1,014		1,014
	New Mexico	24,625		24,622
	Ohio	9,081		9,080
	South Carolina	4,872		310
	Texas	3,500		3,500
	Utah	3,602		3,301
	Washington	151		151
	Other	885		886
	Total Health Plans segment	71,730		52,789
	Molina Medicaid Solutions segment	10,306		10,304
		$	82,036	$	63,093
	The contractual maturities of our held-to-maturity restricted investments as of March 31, 2014 are summarized below.
		Amortized		Estimated
		Cost		Fair Value
		(In thousands)
	Due in one year or less	$	76,957	$	76,963
	Due one year through five years	5,079		5,083
		$	82,036	$	82,046

Medical_Claims_and_Benefits_Pa

Medical Claims and Benefits Payable	3 Months Ended
	Mar. 31, 2014
Other Liabilities Disclosure [Abstract]	'
Medical Claims and Benefits Payable	'
	Medical Claims and Benefits Payable
	Medical claims and benefits payable include amounts payable to certain providers for which we act as an intermediary on behalf of various state agencies without assuming financial risk. Such receipts and payments do not impact our consolidated statements of income. Non-risk provider payables amounted to $122.7 million and $151.3 million as of March 31, 2014, and December 31, 2013, respectively.
	The following table presents the components of the change in our medical claims and benefits payable from continuing and discontinued operations combined for the periods indicated. The amounts displayed for “Components of medical care costs related to: Prior periods” represent the amount by which our original estimate of claims and benefits payable at the beginning of the period were more than the actual amount of the liability based on information (principally the payment of claims) developed since that liability was first reported.
		Three Months Ended March 31,						Year Ended
		2014			2013			31-Dec-13
		(Dollars in thousands)
	Balances at beginning of period	$	669,787		$	494,530		$	494,530
	Components of medical care costs related to:
	Current period	1,773,332			1,347,181			5,434,443
	Prior periods	(50,904		)	(58,427		)	(52,779		)
	Total medical care costs	1,722,428			1,288,754			5,381,664
	Change in non-risk provider payables	(28,560		)	(7,638		)	111,267
	Payments for medical care costs related to:
	Current period	1,172,672			948,820			4,932,195
	Prior periods	371,442			335,681			385,479
	Total paid	1,544,114			1,284,501			5,317,674
	Balances at end of period	$	819,541		$	491,145		$	669,787
	Benefit from prior period as a percentage of:
	Balance at beginning of period	7.6		%	11.8		%	10.7		%
	Premium revenue, trailing twelve months	0.8		%	1		%	0.9		%
	Medical care costs, trailing twelve months	0.9		%	1.1		%	1		%
	Assuming that our initial estimate of claims incurred but not paid (IBNP) is accurate, we believe that amounts ultimately paid out would generally be between 8% and 10% less than the liability recorded at the end of the period as a result of the inclusion in that liability of the allowance for adverse claims development and the accrued cost of settling those claims. Because the amount of our initial liability is merely an estimate (and therefore not perfectly accurate), we will always experience variability in that estimate as new information becomes available with the passage of time. Therefore, there can be no assurance that amounts ultimately paid out will fall within the range of 8% to 10% lower than the liability that was initially recorded. Furthermore, because our initial estimate of IBNP is derived from many factors, some of which are qualitative in nature rather than quantitative, we are seldom able to assign specific values to the reasons for a change in estimate – we only know when the circumstances for any one or more factors are out of the ordinary.
	As indicated above, the amounts ultimately paid out on our liabilities in fiscal years 2014 and 2013 were less than what we had expected when we had established our reserves. For example, for the year ended December 31, 2013, the amounts ultimately paid out were less than the amount of the reserves we had established as of December 31, 2012 by 10.7%. While many related factors working in conjunction with one another determine the accuracy of our estimates, we are seldom able to quantify the impact that any single factor has on a change in estimate. In addition, given the variability inherent in the reserving process, we will only be able to identify specific factors if they represent a significant departure from expectations. As a result, we do not expect to be able to fully quantify the impact of individual factors on changes in estimates.
	We recognized favorable prior period claims development in the amount of $50.9 million for the three months ended March 31, 2014. This amount represents our estimate as of March 31, 2014, of the extent to which our initial estimate of medical claims and benefits payable at December 31, 2013 was more than the amount that will ultimately be paid out in satisfaction of that liability. We believe the overestimation of our claims liability at December 31, 2013 was due primarily to the following factors:
	•	At our Ohio health plan, we entered new regions in the state, and a new product, ABD Kids, in July 2013. Since we did not have enough historical claims data to use the pattern of paid and incurred claims, we initially estimated the reserves for these new members by applying an estimated medical care ratio (MCR). This resulted in an overstatement of our reserve liability as of December 31, 2013.
	•	At our Michigan health plan, we overestimated the impact of certain unpaid potentially high-dollar claims. In addition, we overestimated the impact of the flu season on the outpatient claims for November and December 2013, which caused an overestimation in our outpatient reserve liability as of December 31, 2013.
	We recognized favorable prior period claims development in the amount of $58.4 million for the three months ended March 31, 2013. This amount represents our estimate as of March 31, 2013, of the extent to which our initial estimate of medical claims and benefits payable at December 31, 2012 was more than the amount that would ultimately be paid out in satisfaction of that liability. We believe the overestimation of our claims liability at December 31, 2012, was due primarily to the following factors:
	•	At our Texas health plan, we saw a reduction in STAR+PLUS (the state’s program for aged and disabled members) membership during mid to late 2012. This caused a reduction in costs per member that we did not fully recognize in our December 31, 2012 reserve estimates.
	•	At our Washington health plan, prior to July 2012, certain high-cost newborns that were approved for Supplemental Security Income (SSI) coverage by the state were retroactively dis-enrolled from our Healthy Options (TANF) coverage, and the health plan was reimbursed for the claims paid on behalf of these members. Starting July 1, 2012, these newborns, as well as other high-cost disabled members, are now covered by the health plan under the Health Options Blind and Disabled (HOBD) program. At the end of 2012, we did not have enough claims history to accurately estimate the claims liability of the HOBD members, and as a result the liability for these high-cost members was overstated.
	•	For our New Mexico health plan, we overestimated the impact of certain high-dollar outstanding claim payments as of December 31, 2012.
	In estimating our claims liability at March 31, 2014, we adjusted our base calculation to take account of the following factors which we believe are reasonably likely to change our final claims liability amount:
	•	Effective January 1, 2014, we began covering approximately 133,000 members under Medicaid Expansion. These are new members and a new product, so we do not have historical claims data to use for purposes of establishing the reserves. Therefore, we are applying an estimated MCR to establish the estimated incurred claims and the reserves for these members.
	•	Effective January 1, 2014, we began covering approximately 126,000 new members at our South Carolina health plan. Because this is a new health plan for us, we do not have historical claims data to use for purposes of establishing the reserves. Therefore, we are applying an estimated MCR to establish the estimated incurred claims and the reserves for these members.
	•	At our Texas health plan, we continue to see a significant number of older claims that are being paid as a result of disputes with providers over the initial paid amounts. We have included an allowance for additional provider-disputed claims in our reserves as of March 31, 2014, but it is often difficult to predict the frequency and amount of such claims.
	•	At our New Mexico health plan, the state had fallen behind in adding members to our enrollment. As we were developing our March 31, 2014 reserves, we learned of a large number of members that were enrolled to our health plan retroactively. Since we had no claims history for these members, we applied the projected MCR to estimate the claims and reserves for these members. In addition, effective January 1, 2014, the benefits for New Mexico Medicaid members were expanded to include behavioral health benefits. The additional projected claims, and therefore the additional reserves, for behavioral health benefits were substantial.
	•	At our New Mexico and Washington health plans, we began using an outside vendor to review high-dollar claims.  As part of the process, some claims are denied and more information is requested so that a detailed review of the billed amounts can be conducted. This has caused a disruption in the normal flow of claims payments that we have attempted to reflect in our reserves.
	The use of a consistent methodology in estimating our liability for claims and medical benefits payable minimizes the degree to which the under- or overestimation of that liability at the close of one period may affect consolidated results of operations in subsequent periods. In particular, the use of a consistent methodology should result in the replenishment of reserves during any given period in a manner that generally offsets the benefit of favorable prior period development in that period. Facts and circumstances unique to the estimation process at any single date, however, may still lead to a material impact on consolidated results of operations in subsequent periods. Any absence of adverse claims development (as well as the expensing through general and administrative expense of the costs to settle claims held at the start of the period) will lead to the recognition of a benefit from prior period claims development in the period subsequent to the date of the original estimate. In 2013, and for the three months ended March 31, 2014, the absence of adverse development of the liability for claims and medical benefits payable at the close of the previous period resulted in the recognition of substantial favorable prior period development. In both periods, however, the recognition of a benefit from prior period claims development did not have a material impact on our consolidated results of operations because the replenishment of reserves in the respective periods generally offset the benefit from the prior period.

LongTerm_Debt

Long-Term Debt	3 Months Ended
	Mar. 31, 2014
Debt Disclosure [Abstract]	'
Long-Term Debt	'
	Long-Term Debt
	As of March 31, 2014, maturities of long-term debt for the years ending December 31 are as follows (in thousands):
		Total		2014		2015		2016		2017		2018		Thereafter
	1.125% Notes	$	550,000	$	—	$	—	$	—	$	—	$	—	$	550,000
	3.75% Notes	187,000		187,000		—		—		—		—		—
		$	737,000	$	187,000	$	—	$	—	$	—	$	—	$	550,000
	1.125% Cash Convertible Senior Notes due 2020. In February 2013, we issued $550.0 million aggregate principal amount of 1.125% Cash Convertible Senior Notes due 2020 (the 1.125% Notes), which were outstanding as of March 31, 2014 and December 31, 2013. Interest on the 1.125% Notes is payable semiannually in arrears on January 15 and July 15 of each year, at a rate of 1.125% per annum, and commenced on July 15, 2013. The 1.125% Notes will mature on January 15, 2020 unless repurchased or converted in accordance with their terms prior to such date. The 1.125% Notes are convertible only into cash, and not into shares of our common stock or any other securities.
	The initial conversion rate for the 1.125% Notes was 24.5277 shares of our common stock per $1,000 principal amount of 1.125% Notes (equivalent to an initial conversion price of approximately $40.77 per share of common stock). The conversion rate is subject to adjustment in some events but will not be adjusted for any accrued and unpaid interest.
	The 1.125% Notes contain an embedded cash conversion option, which was separated from the 1.125% Notes and accounted for separately as a derivative liability, with changes in fair value reported in our consolidated statements of income until the embedded cash conversion option transaction settles or expires. The initial fair value liability of the embedded cash conversion option simultaneously reduced the carrying value of the 1.125% Notes (effectively an original issuance discount). This discount is amortized to the 1.125% Notes' principal amount through the recognition of non-cash interest expense over the expected life of the debt. This has resulted in our recognition of interest expense on the 1.125% Notes at an effective rate approximating what we would have incurred had nonconvertible debt with otherwise similar terms been issued, or approximately 5.9%. As of March 31, 2014, we expect the 1.125% Notes to be outstanding until their January 15, 2020 maturity date, for a remaining amortization period of 5.8 years. The 1.125% Notes' if-converted value did not exceed their principal amount as of March 31, 2014 and December 31, 2013.
	3.75% Convertible Senior Notes due 2014. We had $187.0 million of 3.75% Convertible Senior Notes due 2014 (the 3.75% Notes) outstanding as of March 31, 2014 and December 31, 2013. The 3.75% Notes are convertible into cash and, under certain circumstances, shares of our common stock. The initial conversion rate is 31.9601 shares of our common stock per one thousand dollar principal amount of the 3.75% Notes. This represents an initial conversion price of approximately $31.29 per share of our common stock.
	Because the 3.75% Notes have cash settlement features, we have allocated the proceeds from their issuance between a liability component and an equity component. The reduced carrying value on the 3.75% Notes resulted in a debt discount that is amortized back to the 3.75% Notes' principal amount through the recognition of non-cash interest expense over the expected life of the debt. This has resulted in our recognition of interest expense on the 3.75% Notes at an effective rate approximating what we would have incurred had nonconvertible debt with otherwise similar terms been issued. The effective interest rate of the 3.75% Notes is 7.5%, principally based on the seven-year U.S. Treasury note rate as of the October 2007 issuance date, plus an appropriate credit spread. As of March 31, 2014, we expect the 3.75% Notes to be outstanding until their October 1, 2014 maturity date, for a remaining amortization period of 6 months. The 3.75% Notes’ if-converted value exceeded their principal amount by approximately $37 million, and $11 million as of March 31, 2014, and December 31, 2013, respectively. At March 31, 2014, the equity component of the 3.75% Notes, net of the impact of deferred taxes, was $24.0 million.
	The principal amounts, unamortized discount and net carrying amounts of the convertible senior notes were as follows:
		Principal Balance		Unamortized Discount		Net Carrying Amount
		(In thousands)
	March 31, 2014:
	1.125% Notes	$	550,000	$	128,996	$	421,004
	3.75% Notes	187,000		3,451		183,549
		$	737,000	$	132,447	$	604,553
	December 31, 2013:
	1.125% Notes	$	550,000	$	133,632	$	416,368
	3.75% Notes	187,000		5,128		181,872
		$	737,000	$	138,760	$	598,240
		Three Months Ended March 31,
		2014		2013
		(In thousands)
	Interest cost recognized for the period relating to the:
	Contractual interest coupon rate	$	3,300	$	2,527
	Amortization of the discount	6,314		3,723
	Total interest cost recognized	$	9,614	$	6,250
	Lease Financing Obligations. In 2013 we entered into a sale-leaseback transaction for the sale and contemporaneous leaseback of two properties, including the Molina Center located in Long Beach, California, and the building that houses our Ohio health plan located in Columbus, Ohio. Due to our continuing involvement with these leased properties, the sale did not qualify for sale-leaseback accounting treatment and we remain the "accounting owner" of the properties. These assets continue to be included in our consolidated balance sheets, and also continue to be depreciated and amortized over their remaining useful lives. The lease financing obligation is amortized over the 25-year lease term such that there will be no gain or loss recorded if the lease is not extended at the end of its term. Payments under the lease adjust the lease financing obligation, and the imputed interest is recorded to interest expense in our consolidated statements of income.
	As described and defined in further detail in Note 16, "Related Party Transactions," we entered into a lease for office space in February 2013 consisting of two office buildings then under construction, one of which was completed in June 2013. We have concluded that we are the accounting owner of the construction projects because of our continuing involvement in those projects. We have recorded $34.1 million to property, equipment and capitalized software, net, in the accompanying consolidated balance sheet as of March 31, 2014, which represents the total cost, including imputed interest, incurred by the Landlord thus far in the construction projects. As of March 31, 2014, the aggregate amount recorded to lease financing obligations for the construction projects amounted to $34.8 million. Payments under the lease adjust the lease financing obligation, and the imputed interest is recorded to interest expense in our consolidated statements of income. In addition to the capitalization of the costs incurred by the Landlord, we impute and record rent expense relating to the ground leases for the property sites. Such rent expense is computed based on the fair value of the land and our incremental borrowing rate, and was immaterial for the three months ended March 31, 2014.

Derivative_Financial_Instrumen

Derivative Financial Instruments	3 Months Ended
	Mar. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Derivative Instruments Disclosure	'
	Derivative Financial Instruments
	The following table summarizes the fair values and the presentation of our derivative financial instruments (defined and discussed individually below) in the consolidated balance sheets:
		Balance Sheet Location	31-Mar-14		31-Dec-13
			(In thousands)
	Derivative asset:
	1.125% Call Option	Non-current assets: Derivative asset	$	196,617	$	186,351
	Derivative liability:
	Embedded cash conversion option	Non-current liabilities: Derivative liability	$	196,503	$	186,239
	Our derivative financial instruments do not qualify for hedge treatment, therefore the change in fair value of these instruments is recognized immediately in our consolidated statements of income, in other income, net. Gains and losses for each of our derivative financial instruments are presented in the consolidated statements of cash flows.
	1.125% Notes Call Spread Overlay. Concurrent with the issuance of the 1.125% Notes in 2013 as described in Note 11, "Long-Term Debt," we entered into privately negotiated hedge transactions (collectively, the 1.125% Call Option) and warrant transactions (collectively, the 1.125% Warrants), with certain of the initial purchasers of the 1.125% Notes (the Counterparties). We refer to these transactions collectively as the Call Spread Overlay. Under the Call Spread Overlay, the cost of the 1.125% Call Option we purchased to cover the cash outlay upon conversion of the 1.125% Notes was reduced by proceeds from the sale of the 1.125% Warrants. Assuming full performance by the Counterparties (and 1.125% Warrants strike prices in excess of the conversion price of the 1.125% Notes), these transactions are intended to offset cash payments due upon any conversion of the 1.125% Notes.
	1.125% Call Option. The 1.125% Call Option, which is indexed to our common stock, is a derivative asset that requires mark-to-market accounting treatment due to the cash settlement features until the 1.125% Call Option settles or expires. For further discussion of the inputs used to determine the fair value of the 1.125% Call Option, refer to Note 6, "Fair Value Measurements."
	Embedded Cash Conversion Option. The embedded cash conversion option within the 1.125% Notes is accounted for separately as a derivative liability, with changes in fair value reported in our consolidated statements of income until the cash conversion option settles or expires. For further discussion of the inputs used to determine the fair value of the embedded cash conversion option, refer to Note 6, "Fair Value Measurements."

Stockholders_Equity

Stockholders' Equity	3 Months Ended
	Mar. 31, 2014
Stockholders' Equity Note [Abstract]	'
Stockholders' Equity	'
	Stockholders' Equity
	Stockholders' equity increased $4.8 million during the three months ended March 31, 2014 compared with stockholders' equity at December 31, 2013. The increase was primarily due to net income of $4.5 million.
	1.125% Warrants. If the market value per share of our common stock exceeds the strike price of the 1.125% Warrants on any trading day during the 160 trading day measurement period under the 1.125% Warrants, we will be obligated to issue to the Counterparties a number of shares equal in value to the product of the amount by which such market value exceeds such strike price and 1/160th of the aggregate number of shares of our common stock underlying the 1.125% Warrants, subject to a share delivery cap. We will not receive any additional proceeds if the 1.125% Warrants are exercised. Pursuant to the 1.125% Warrants, we issued 13,490,236 warrants with a strike price of $53.8475 per share. The number of warrants and the strike price are subject to adjustment under certain circumstances. The 1.125% Warrants could separately have a dilutive effect to the extent that the market value per share of our common stock (as measured under the terms of the warrant transactions) exceeds the applicable strike price of the 1.125% Warrants.
	Securities Repurchases and Repurchase Program. Effective as of September 30, 2013, our board of directors authorized the repurchase of up to $50.0 million in aggregate of our common stock through December 31, 2014. Stock repurchases under this program may be made through open-market and/or privately negotiated transactions at times and in such amounts as management deems appropriate. The timing and actual number of shares repurchased will depend on a variety of factors including price, corporate and regulatory requirements and other market conditions. As of March 31, 2014, the remaining balance available to repurchase our stock under this program was $47.3 million.
	Shelf Registration Statement. In May 2012, we filed an automatic shelf registration statement on Form S-3 with the SEC covering the issuance of an indeterminate number of our securities, including common stock, warrants, or debt securities. We may publicly offer securities from time to time at prices and terms to be determined at the time of the offering.
	Stock Plans. In connection with our equity incentive plans, we issued approximately 391,000 shares of common stock, net of shares used to settle employees’ income tax obligations, for the three months ended March 31, 2014.

Segment_Information

Segment Information	3 Months Ended
	Mar. 31, 2014
Segment Reporting [Abstract]	'
Segment Information	'
	Segment Information
	We report our financial performance based on two reportable segments: the Health Plans segment and the Molina Medicaid Solutions segment. Our reportable segments are consistent with how we manage the business and view the markets we serve. Our Health Plans segment consists of our state health plans and also includes our direct delivery business. Our state health plans represent operating segments that have been aggregated for reporting purposes because they share similar economic characteristics.
	Our Molina Medicaid Solutions segment provides MMIS design, development, implementation; business process outsourcing solutions; hosting services; and information technology support services to state Medicaid agencies.
	We rely on an internal management reporting process that provides segment information to the operating income level for purposes of making financial decisions and allocating resources. The accounting policies of the segments are the same as those described in Note 2, "Significant Accounting Policies." The cost of services shared between the Health Plans and Molina Medicaid Solutions segment is charged to the Health Plans segment.
		Three Months Ended March 31,
		2014		2013
		(In thousands)
	Revenue from continuing operations:
	Health Plans segment:
	Premium revenue	$	1,940,337	$	1,497,433
	Premium tax revenue	51,693		37,000
	Health insurer fee revenue	18,696		—
	Investment income	1,629		1,516
	Other revenue	3,258		4,694
	Molina Medicaid Solutions segment:
	Service revenue	53,630		49,756
		$	2,069,243	$	1,590,399
	Operating income from continuing operations:
	Health Plans segment	$	14,019	$	61,520
	Molina Medicaid Solutions segment	10,248		6,353
	Total operating income from continuing operations	24,267		67,873
	Other expenses, net	13,778		12,906
	Income from continuing operations before income tax expense	$	10,489	$	54,967

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	Commitments and Contingencies
	California Health Plan Rate Settlement Agreement. In the fourth quarter of 2013, our California health plan entered into a settlement agreement with the California Department of Health Care Services (DHCS). The agreement settled rate disputes initiated by our California health plan dating back to 2003 with respect to its participation in Medi-Cal (California’s Medicaid program). Under the terms of the agreement, a settlement account (the Account) applicable to the California health plan’s managed care contracts has been established.
	Effective January 1, 2014, the Account was established with an initial balance of zero, and will be settled after December 31, 2017. DHCS will make an interim partial settlement payment to us if it terminates early, without replacement, any of our managed care contracts. The Account will be adjusted annually to reflect a calendar year deficit or surplus, which is determined by comparing the California health plan’s pre-tax margin and a target margin established in the settlement agreement. Upon expiration of the settlement agreement, if the Account is in a deficit position, then DHCS will pay the amount of the deficit to us, subject to an alternative minimum payment amount. If the Account is in a surplus position, then no amount is owed to either party. The maximum amount that DHCS would pay to us under the terms of the settlement agreement is $40.0 million.
	We estimate and recognize the retrospective adjustments to premium revenue based on our experience to date under the California health plan's managed care contracts. As of March 31, 2014, we recorded a deficit, or receivable, of $5.0 million, net of a valuation discount of $0.3 million, reflecting our estimated retrospective premium adjustment to the Account based on the California health plan's actual pretax margin for the three months ended March 31, 2014.
	Legal Proceedings. The health care and business process outsourcing industries are subject to numerous laws and regulations of federal, state, and local governments. Compliance with these laws and regulations can be subject to government review and interpretation, as well as regulatory actions unknown and unasserted at this time. Penalties associated with violations of these laws and regulations include significant fines and penalties, exclusion from participating in publicly funded programs, and the repayment of previously billed and collected revenues.
	We are involved in legal actions in the ordinary course of business, some of which seek monetary damages, including claims for punitive damages, which are not covered by insurance. We have accrued liabilities for certain matters for which we deem the loss to be both probable and estimable. Although we believe that our estimates of such losses are reasonable, these estimates could change as a result of further developments of these matters. The outcome of legal actions is inherently uncertain and such pending matters for which accruals have not been established have not progressed sufficiently through discovery and/or development of important factual information and legal issues to enable us to estimate a range of possible loss, if any. While it is not possible to accurately predict or determine the eventual outcomes of these items, an adverse determination in one or more of these pending matters could have a material adverse effect on our consolidated financial position, results of operations, or cash flows.
	Washington Health Plan. The Washington Health Care Authority (HCA) has communicated that it believes it has overpaid our Washington health plan with regard to certain claims. The alleged overpayments, which relate to and were incorporated into the capitation rates paid to our Washington health plan, date back to July 1, 2012, the start date of the current contract. On March 25, 2014, HCA alleged that the total "overpayments" related to HCA’s delayed enrollment of so-called Washington Community Options Program Entry System (COPES) members were $14.4 million, and demanded payment in that amount. On April 7, 2014, HCA alleged that the total "overpayments" related to certain psychotropic drug claims that had been included in the Request for Proposal (RFP) rate book were $5.8 million, and demanded payment in that amount. HCA has provided us with minimal data by which we might independently validate HCA’s allegations. Furthermore, both alleged errors, if they in fact occurred, were unilateral errors committed and caused by HCA for which our Washington health plan had no contemporaneous knowledge and had assumed and bore no contractual risk. We are in the process of responding to HCA’s demands for payment, noting that the demands are improper since under Washington law there were in fact no "overpayments" since payment was made consistent with the express terms of the parties’ contract. We believe that any actual liability for the alleged overpayment claims is not currently probable or reasonably estimable.
	Provider Claims. Many of our medical contracts are complex in nature and may be subject to differing interpretations regarding amounts due for the provision of various services. Such differing interpretations have led certain medical providers to pursue us for additional compensation. The claims made by providers in such circumstances often involve issues of contract compliance, interpretation, payment methodology, and intent. These claims often extend to services provided by the providers over a number of years.
	Various providers have contacted us seeking additional compensation for claims that we believe to have been settled. These matters, when finally concluded and determined, will not, in our opinion, have a material adverse effect on our business, consolidated financial position, results of operations, or cash flows.
	Regulatory Capital and Dividend Restrictions. Our health plans, which are operated by our respective wholly owned subsidiaries in those states, are subject to state laws and regulations that, among other things, require the maintenance of minimum levels of statutory capital, as defined by each state. Regulators in some states may also attempt to enforce capital requirements upon us that require the retention of net worth in excess of amounts formally required by statute or regulation. Such statues, regulations and informal capital requirements also restrict the timing, payment, and amount of dividends and other distributions that may be paid to us as the sole stockholder. To the extent our subsidiaries must comply with these regulations, they may not have the financial flexibility to transfer funds to us. Based upon current statutes and regulations, the net assets in these subsidiaries (after intercompany eliminations) which may not be transferable to us in the form of loans, advances, or cash dividends was approximately $592 million at March 31, 2014, and $608 million at December 31, 2013. Because of the statutory restrictions that inhibit the ability of our health plans to transfer net assets to us, the amount of retained earnings readily available to pay dividends to our stockholders is generally limited to cash, cash equivalents and investments held by the parent company – Molina Healthcare, Inc. Such cash, cash equivalents and investments amounted to $339.8 million and $365.2 million as of March 31, 2014 and December 31, 2013, respectively.
	The National Association of Insurance Commissioners, or NAIC, adopted rules effective December 31, 1998, which, if implemented by the states, set minimum capitalization requirements for insurance companies, HMOs, and other entities bearing risk for health care coverage. The requirements take the form of risk-based capital (RBC) rules. Illinois, Michigan, New Mexico, Ohio, South Carolina, Texas, Utah, Washington, and Wisconsin have adopted these rules, which may vary from state to state. California and Florida have not adopted NAIC risk-based capital requirements for HMOs and have not formally given notice of their intention to do so. Such requirements, if adopted by California and Florida, may increase the minimum capital required for those states.
	As of March 31, 2014, our health plans had aggregate statutory capital and surplus of approximately $641 million compared with the required minimum aggregate statutory capital and surplus of approximately $410 million. All of our health plans were in compliance with the minimum capital requirements at March 31, 2014. We have the ability and commitment to provide additional capital to each of our health plans when necessary to ensure that statutory capital and surplus continue to meet regulatory requirements.

Related_Party_Transactions

Related Party Transactions	3 Months Ended
	Mar. 31, 2014
Related Party Transactions [Abstract]	'
Related Party Transactions	'
	Related Party Transactions
	In February 2013, we entered into a lease with 6th & Pine Development, LLC (the Landlord) for office space located in Long Beach, California. The lease consists of two office buildings, one of which is under construction.
	The principal members of the Landlord are John C. Molina, our chief financial officer and a director of the Company, and his wife. In addition, in connection with the development of the buildings being leased, the Landlord has pledged shares of common stock in the Company the Landlord holds as trustee. Dr. J. Mario Molina, our chief executive officer, president, and chairman of the board of directors, holds a partial interest in such shares as trust beneficiary.
	The lease term for the completed building commenced in June 2013, and the lease term for the building under construction is expected to commence in September 2014. The initial lease term for both buildings expires on December 31, 2024, subject to two five-year renewal options. Annual rent for the completed building is approximately $3 million, and initial annual rent for the building under construction is expected to be approximately $4 million. Rent increases 3.75% per year during the initial term. Rent during the extension terms will be the greater of then-current rent or fair market rent.
	Refer to Note 17, "Variable Interest Entities," for a discussion of the Joseph M. Molina, M.D. Professional Corporations.

Variable_Interest_Entities

Variable Interest Entities	3 Months Ended
	Mar. 31, 2014
Variable Interest Entities [Abstract]	'
Variable Interest Entities	'
	Variable Interest Entities
	Joseph M. Molina M.D., Professional Corporations. The Joseph M. Molina, M.D. Professional Corporations (JMMPC) were created in 2012 to further advance our direct delivery business. JMMPC's sole shareholder is Dr. J. Mario Molina, our chief executive officer, president, and chairman of the board of directors. Dr. Molina is paid no salary and receives no dividends in connection with his work for, or ownership of, JMMPC. JMMPC provides professional medical services to the general public for routine non-life threatening, outpatient health care needs. Substantially all of the individuals served by JMMPC are members of our health plans. JMMPC does not have agreements to provide professional medical services with any other entities.
	Our wholly owned subsidiary, American Family Care, Inc. (AFC), has entered into services agreements with JMMPC to provide clinic facilities, clinic administrative support staff, patient scheduling services and medical supplies to JMMPC. The services agreements were designed such that JMMPC will operate at break even, ensuring the availability of quality care and access for our health plan members. The services agreements provide that the administrative fees charged to JMMPC by AFC are reviewed annually to assure the achievement of this goal.
	Our California, Florida, New Mexico and Washington health plans have entered into primary care capitation agreements with JMMPC. These agreements direct our health plans to perform a monthly reconciliation, to either fund JMMPC's operating deficits, or receive JMMPC's operating surpluses, such that JMMPC will derive no profit or loss. Because the AFC services agreements described above mitigate the likelihood of significant operating deficits or surpluses, such monthly reconciliation amounts are generally insignificant.
	We have determined that JMMPC is a variable interest entity (VIE), and that we are its primary beneficiary. We have reached this conclusion under the power and benefits criterion model according to GAAP. Specifically, we have the power to direct the activities that most significantly affect JMMPC's economic performance, and the obligation to absorb losses or right to receive benefits that are potentially significant to the VIE, under the agreements described above. Because we are its primary beneficiary, we have consolidated JMMPC. JMMPC's assets may be used to settle only JMMPC's obligations, and JMMPC's creditors have no recourse to the general credit of Molina Healthcare, Inc. As of March 31, 2014, JMMPC had total assets of $8.9 million, and total liabilities of $8.6 million. As of December 31, 2013, JMMPC had total assets of $6.9 million and total liabilities of $6.6 million.
	Our maximum exposure to loss as a result of our involvement with JMMPC is generally limited to the amounts needed to fund JMMPC's ongoing payroll and employee benefits. We believe that such loss exposure will be immaterial to our consolidated operating results and cash flows for the foreseeable future.

Significant_Accounting_Policie1

Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2014
Accounting Policies [Abstract]	'
Consolidation and Interim Financial Information	'
	Consolidation and Interim Financial Information
	The consolidated financial statements include the accounts of Molina Healthcare, Inc., its subsidiaries and variable interest entities in which Molina Healthcare, Inc. is considered to be the primary beneficiary. Such variable interest entities are insignificant to our consolidated financial position and results of operations. In the opinion of management, all adjustments considered necessary for a fair presentation of the results as of the date and for the interim periods presented have been included; such adjustments consist of normal recurring adjustments. All significant intercompany balances and transactions have been eliminated. The consolidated results of operations for the current interim period are not necessarily indicative of the results for the entire year ending December 31, 2014.
	The unaudited consolidated interim financial statements have been prepared under the assumption that users of the interim financial data have either read or have access to our audited consolidated financial statements for the fiscal year ended December 31, 2013. Accordingly, certain disclosures that would substantially duplicate the disclosures contained in the December 31, 2013 audited consolidated financial statements have been omitted. These unaudited consolidated interim financial statements should be read in conjunction with our December 31, 2013 audited consolidated financial statements.
Premium Revenue – Health Plans Segment	'
	Premium Revenue – Health Plans Segment
	Premium revenue is fixed in advance of the periods covered and, except as described below, is not generally subject to significant accounting estimates. Premium revenues are recognized in the month that members are entitled to receive health care services.
	Certain components of premium revenue are subject to accounting estimates and fall into two categories:
	-1	Contractual provisions with revenue or profit limits:
	Health Plan Medical Cost Floors (Minimums), Medical Cost Corridors, and Administrative Cost Ceilings (Maximums): A portion of certain Medicaid premiums received by our California, Florida, Illinois, New Mexico, and Washington health plans may be returned to the state if certain minimum amounts are not spent on defined medical care costs. In some cases, the health plans may receive additional premiums if amounts spent on medical care costs exceed a defined maximum threshold. Additionally, all of our health plans with Medicare and Health Insurance Marketplaces membership are required to spend certain minimum amounts on defined medical care costs. In the aggregate, we recorded a liability under the terms of such contract provisions of $2.0 million and $1.4 million at March 31, 2014, and December 31, 2013, respectively. In Michigan and Ohio, the state may levy non-monetary sanctions on us if certain minimum amounts are not spent on defined medical care costs, or if administrative costs exceed certain amounts.
	Health Plan Profit Sharing and Profit Ceiling: Our contracts with the states of New Mexico, Texas, and Washington contain profit-sharing or profit ceiling provisions under which we refund amounts to the states if our health plans generate profit above a certain specified percentage, in some cases in accordance with a tiered rebate schedule. In some cases, we are limited in the amount of administrative costs that we may deduct in calculating the refund, if any. As a result of profits in excess of the amount we are allowed to fully retain, we recorded a liability of $11.1 million and $2.5 million at March 31, 2014 and December 31, 2013, respectively.
	Medicare Revenue Risk Adjustment: Based on member encounter data that we submit to CMS (the Centers for Medicare and Medicaid Services), our Medicare premiums are subject to retroactive adjustment for both member risk scores and member pharmacy cost experience for up to two years after the original year of service. This adjustment takes into account the acuity of each member’s medical needs relative to what was anticipated when premiums were originally set for that member. In the event that a member requires less acute medical care than was anticipated by the original premium amount, CMS may recover premium from us. In the event that a member requires more acute medical care than was anticipated by the original premium amount, CMS may pay us additional retroactive premium. A similar retroactive reconciliation is undertaken by CMS for our Medicare members’ pharmacy utilization. We estimate the amount of Medicare revenue that will ultimately be realized for the periods presented based on our knowledge of our members’ health care utilization patterns and CMS practices. Based on our knowledge of member health care utilization patterns and expenses we have recorded a net receivable of $33.4 million and $20.8 million for anticipated Medicare risk adjustment premiums at March 31, 2014 and December 31, 2013, respectively.
	-2	Quality incentives:
	At our Illinois, New Mexico, Ohio, Texas, Washington and Wisconsin health plans, revenue ranging from approximately 1.00% to 5.00% of health plan premiums is earned if certain performance measures are met.
	The following table quantifies the quality incentive premium revenue recognized for the periods presented, including the amounts earned in the periods presented and prior periods. Although the reasonably possible effects of a change in estimate related to quality incentive premium revenue as of March 31, 2014 are not known, we have no reason to believe that the adjustments to prior years noted below are not indicative of the potential future changes in our estimates as of March 31, 2014.
		Three Months Ended March 31,
		2014			2013
		(In thousands)
	Maximum available quality incentive premium - current period	$	20,164		$	20,615
	Amount of quality incentive premium revenue recognized in current period:
	Earned current period	$	5,297		$	14,896
	Earned prior periods	(378		)	6,712
	Total	$	4,919		21,608
	Total premium revenue recognized for state health plans with quality incentive premiums	$	1,200,619		$	709,383
Service Revenue and Cost of Service Revenue — Molina Medicaid Solutions Segment	'
	Service Revenue and Cost of Service Revenue — Molina Medicaid Solutions Segment
	The payments received by our Molina Medicaid Solutions segment under its state contracts are based on the performance of multiple services. The first of these is the design, development and implementation (DDI) of a Medicaid management information system (MMIS). An additional service, following completion of DDI, is the operation of the MMIS under a business process outsourcing (BPO) arrangement. When providing BPO services (which include claims payment and eligibility processing) we also provide the state with other services including both hosting and support, and maintenance. Because we have determined the services provided under our Molina Medicaid Solutions contracts represent a single unit of accounting, we recognize revenue associated with such contracts on a straight-line basis over the period during which BPO, hosting, and support and maintenance services are delivered.
	Cost of service revenue consists primarily of the costs incurred to provide BPO and technology outsourcing services under our MMIS contracts. General and administrative costs consist primarily of indirect administrative costs and business development costs. In some circumstances we may defer recognition of incremental direct costs (such as direct labor, hardware, and software) associated with a contract if revenue recognition is also deferred. Such deferred contract costs are amortized on a straight-line basis over the remaining original contract term, consistent with the revenue recognition period.
Income Taxes	'
	Income Taxes
	The provision for income taxes is determined using an estimated annual effective tax rate, which is generally greater than the U.S. federal statutory rate primarily because of state taxes, nondeductible health insurer fee expenses, nondeductible compensation and other general and administrative expenses. The effective tax rate may be subject to fluctuations during the year as new information is obtained. Such information may affect the assumptions used to estimate the annual effective tax rate, including factors such as the mix of pretax earnings in the various tax jurisdictions in which we operate, valuation allowances against deferred tax assets, the recognition or the reversal of the recognition of tax benefits related to uncertain tax positions, and changes in or the interpretation of tax laws in jurisdictions where we conduct business. We recognize deferred tax assets and liabilities for temporary differences between the financial reporting basis and the tax basis of our assets and liabilities, along with net operating loss and tax credit carryovers.
Recent Accounting Pronouncements	'
	New Accounting Standards
	Health Insurer Fee. In the first quarter of 2014, we adopted the guidance of the Financial Accounting Standards Board (FASB) related to accounting for the fees to be paid by health insurers to the federal government under the Patient Protection and Affordable Care Act and the Health Care and Education Reconciliation Act of 2010 (collectively, the Affordable Care Act, or ACA). The ACA imposes an annual fee, or excise tax, on health insurers for each calendar year beginning on or after January 1, 2014. The health insurer fee (HIF) is imposed beginning in 2014 based on a company's share of the industry's net premiums written during the preceding calendar year, and is payable on September 30 of each year.
	Effective January 1, 2014, we recorded our estimate of the 2014 liability to accounts payable and accrued liabilities, amounting to $88.8 million. We are amortizing this liability on a straight-line basis in 2014, and recorded $22.2 million to health insurer fee expenses in the first quarter of 2014. As enacted, this federal premium-based assessment is non-deductible for income tax purposes.
	Income Taxes. In the first quarter of 2014, we adopted the FASB's guidance for the presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists. The new guidance states that an unrecognized tax benefit, or a portion of an unrecognized tax benefit, should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward. The adoption of this new guidance did not impact our consolidated financial position, results of operations or cash flows.
	Other recent accounting pronouncements issued by the FASB (including its Emerging Issues Task Force), the American Institute of Certified Public Accountants, and the Securities and Exchange Commission did not have, or are not believed by management to have, a material impact on our present or future consolidated financial statements.

Significant_Accounting_Policie2

Significant Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 2014
Accounting Policies [Abstract]	'
Quality incentive premium revenue recognized	'
		Three Months Ended March 31,
		2014			2013
		(In thousands)
	Maximum available quality incentive premium - current period	$	20,164		$	20,615
	Amount of quality incentive premium revenue recognized in current period:
	Earned current period	$	5,297		$	14,896
	Earned prior periods	(378		)	6,712
	Total	$	4,919		21,608
	Total premium revenue recognized for state health plans with quality incentive premiums	$	1,200,619		$	709,383

Net_Income_Per_Share_Table

Net Income Per Share (Table)	3 Months Ended
	Mar. 31, 2014
Earnings Per Share [Abstract]	'
Summary of denominators for the computation of basic and diluted net income (loss) per share	'
	The following table sets forth the calculation of the denominators used to compute basic and diluted net income per share:
		Three Months Ended March 31,
		2014	2013
		(In thousands)
	Shares outstanding at the beginning of the period	45,871	46,762
	Weighted-average number of shares repurchased	—	(867	)
	Weighted-average number of shares issued	150	86
	Denominator for basic net income per share	46,021	45,981
	Dilutive effect of employee restricted stock awards and stock options	597	462
	Dilutive effect of 3.75% Notes (1)	902	—
	Denominator for diluted net income per share	47,520	46,443
	Potentially dilutive amounts excluded from calculations (1),(2):
	Restricted stock awards	192	203
	Stock options	45	26
	1.125% Warrants	13,490	7,345
	______________________________
	-1	Potentially dilutive shares issuable pursuant to our 3.75% Notes (defined in Note 11, "Long-Term Debt") were not included in the computation of diluted net income per share for the three months ended March 31, 2013, because to do so would have been anti-dilutive. Potentially dilutive shares issuable pursuant to our 1.125% Warrants (defined in Note 12, "Derivative Financial Instruments") were not included in the computation of diluted net income per share for the three months ended March 31, 2014 and 2013 because to do so would have been anti-dilutive.
	-2	Unvested restricted shares are included in the calculation of diluted net income per share when their grant date fair values are below the average fair value of the common shares for each of the periods presented. Options to purchase common shares are included in the calculation of diluted net income per share when their exercise prices are below the average fair value of the common shares for each of the periods presented.

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Stock based compensation expense	'
	Charged to general and administrative expenses, total stock-based compensation expense was as follows:
		Three Months Ended March 31,
		2014			2013
		(In thousands)
	Restricted stock and performance awards	$	4,608		$	3,848
	Employee stock purchase plan and stock options	988			573
		$	5,596		$	4,421
Restricted share activity	'
	Restricted and performance stock activity for the three months ended March 31, 2014 is summarized below:
		Shares		Weighted
				Average
				Grant Date
				Fair Value
	Unvested balance as of December 31, 2013	1,299,852		$	29.03
	Granted	628,936		36.46
	Vested	(561,407	)	27.46
	Forfeited	(6,125	)	27.36
	Unvested balance as of March 31, 2014	1,361,256		33.12
Stock option activity	'
	Stock option activity for the three months ended March 31, 2014 is summarized below:
		Options		Weighted			Aggregate		Weighted
				Average			Intrinsic		Average
				Exercise			Value		Remaining
				Price					Contractual
									term
							(In thousands)		(Years)
	Outstanding as of December 31, 2013	379,221		$	24.14
	Exercised	(51,750	)	25.69
	Outstanding as of March 31, 2014	327,471		23.9			$	4,475	3.5
	Stock options exercisable and expected to vest as of March 31, 2014	327,471		23.9			$	4,475	3.5
	Exercisable as of March 31, 2014	292,471		22.77			$	4,325	2.9

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2014
Fair Value Disclosures [Abstract]	'
Fair value of assets measured on recurring basis	'
	Our financial instruments measured at fair value on a recurring basis at March 31, 2014, were as follows:
		Total		Level 1		Level 2			Level 3
		(In thousands)
	Corporate debt securities	$	451,682	$	—	$	451,682		$	—
	Municipal securities	99,748		—		99,748			—
	GSEs	69,326		69,326		—			—
	U.S. treasury notes	35,035		35,035		—			—
	Certificates of deposit	40,409		—		40,409			—
	Auction rate securities	10,928		—		—			10,928
	1.125% Call Option derivative asset	196,617		—		—			196,617
	Total assets measured at fair value on a recurring basis	$	903,745	$	104,361	$	591,839		$	207,545
	Embedded cash conversion option derivative liability	$	196,503	$	—	$	—		$	196,503
	Contingent consideration liabilities	15,164		—		—			15,164
	Total liabilities measured at fair value on a recurring basis	$	211,667	$	—	$	—		$	211,667
	Our financial instruments measured at fair value on a recurring basis at December 31, 2013, were as follows:
		Total		Level 1		Level 2			Level 3
		(In thousands)
	Corporate debt securities	$	449,772	$	—	$	449,772		$	—
	Municipal securities	113,330		—		113,330			—
	GSEs	68,817		68,817		—			—
	U.S. treasury notes	37,376		37,376		—			—
	Certificates of deposit	33,757		—		33,757			—
	Auction rate securities	10,898		—		—			10,898
	1.125% Call Option derivative asset	186,351		—		—			186,351
	Total assets measured at fair value on a recurring basis	$	900,301	$	106,193	$	596,859		$	197,249
	Embedded cash conversion option derivative liability	$	186,239	$	—	$	—		$	186,239
	Contingent consideration liabilities	57,548		—		—			57,548
	Total liabilities measured at fair value on a recurring basis	$	243,787	$	—	$	—		$	243,787
Fair value of assets measured on recurring basis using unobservable inputs	'
	The following table presents activity relating to our assets (liabilities) measured at fair value on a recurring basis using significant unobservable inputs (Level 3):
		Change in Level 3 Instruments
		Auction Rate Securities		Derivatives, Net		Contingent Consideration Liabilities
		(In thousands)
	Balance at December 31, 2013	$	10,898	$	112	$	(57,548	)
	Total gains for the period recognized in:
	General and administrative expenses	—		—		4,265
	Other expenses, net	—		2		—
	Other comprehensive income	30		—		—
	Settlements	—		—		38,119
	Balance at March 31, 2014	$	10,928	$	114	$	(15,164	)
Schedule of fair value, asset and liabilities measured on recurring basis - disclosure only	'
	The carrying amounts and estimated fair values of our long-term debt, as well as the applicable fair value hierarchy tiers, are contained in the tables below. Our convertible senior notes are classified as Level 2 financial instruments. Fair value for these securities is determined using a market approach based on quoted prices for similar securities in active markets or quoted prices for identical securities in inactive markets.
		31-Mar-14
		Carrying		Total		Level 1			Level 2		Level 3
		Value		Fair Value
		(In thousands)
	1.125% Notes	$	421,004	$	615,313	$	—		$	615,313	$	—
	3.75% Notes	183,549		229,075		—			229,075		—
		$	604,553	$	844,388	$	—		$	844,388	$	—
		31-Dec-13
		Carrying		Total		Level 1			Level 2		Level 3
		Value		Fair Value
		(In thousands)
	1.125% Notes	$	416,368	$	572,627	$	—		$	572,627	$	—
	3.75% Notes	181,872		219,491		—			219,491		—
		$	598,240	$	792,118	$	—		$	792,118	$	—

Investments_Tables

Investments (Tables)	3 Months Ended
	Mar. 31, 2014
Investments, Debt and Equity Securities [Abstract]	'
Investments	'
	The following tables summarize our investments as of the dates indicated:
		31-Mar-14
		Amortized		Gross					Estimated
				Unrealized					Fair
		Cost		Gains		Losses			Value
		(In thousands)
	Corporate debt securities	$	451,484	$	613	$	415		$	451,682
	Municipal securities	99,775		266		293			99,748
	GSEs	69,379		18		71			69,326
	U.S. treasury notes	35,004		57		26			35,035
	Certificates of deposit	40,412		5		8			40,409
	Subtotal - current investments	696,054		959		813			696,200
	Auction rate securities	11,400		—		472			10,928
		$	707,454	$	959	$	1,285		$	707,128
		31-Dec-13
		Amortized		Gross					Estimated
				Unrealized					Fair
		Cost		Gains		Losses			Value
		(In thousands)
	Corporate debt securities	$	450,162	$	442	$	832		$	449,772
	Municipal securities	114,126		119		915			113,330
	GSEs	68,898		6		87			68,817
	U.S. treasury notes	37,360		44		28			37,376
	Certificates of deposit	33,756		2		1			33,757
	Subtotal - current investments	704,302		613		1,863			703,052
	Auction rate securities	11,400		—		502			10,898
		$	715,702	$	613	$	2,365		$	713,950
Contractual maturities of investments	'
	The contractual maturities of our investments as of March 31, 2014 are summarized below:
		Amortized Cost		Estimated
				Fair Value
		(In thousands)
	Due in one year or less	$	329,504	$	329,633
	Due one year through five years	366,550		366,567
	Due after ten years	11,400		10,928
		$	707,454	$	707,128
Schedule of available for sale securities continuous unrealized loss position	'
	The following tables segregate those available-for-sale investments that have been in a continuous loss position for less than 12 months, and those that have been in a loss position for 12 months or more as of March 31, 2014.
		In a Continuous Loss Position						In a Continuous Loss Position
		for Less than 12 Months						for 12 Months or More
		Estimated		Unrealized		Total		Estimated			Unrealized		Total
		Fair		Losses		Number of		Fair			Losses		Number of
		Value				Securities		Value					Securities
		(Dollars in thousands)
	Corporate debt securities	$	137,383	$	334	64		$	11,829		$	81	5
	Municipal securities	14,143		110		18		27,085			183		30
	GSEs	28,741		63		11		5,541			8		6
	U.S. treasury notes	8,821		26		7		—			—		—
	Certificates of deposit	10,566		8		43		—			—		—
	Auction rate securities	—		—		—		10,928			472		15
		$	199,654	$	541	143		$	55,383		$	744	56
	The following table segregates those available-for-sale investments that have been in a continuous loss position for less than 12 months, and those that have been in a loss position for 12 months or more as of December 31, 2013.
		In a Continuous Loss Position						In a Continuous Loss Position
		for Less than 12 Months						for 12 Months or More
		Estimated		Unrealized		Total		Estimated			Unrealized		Total
		Fair		Losses		Number of		Fair			Losses		Number of
		Value				Securities		Value					Securities
		(Dollars in thousands)
	Corporate debt securities	$	210,057	$	802	91		$	2,540		$	30	3
	Municipal securities	30,715		398		49		31,091			517		39
	GSEs	53,308		87		21		—			—		—
	U.S. treasury notes	12,037		28		11		—			—		—
	Certificates of deposit	414		1		2		—			—		—
	Auction rate securities	—		—		—		10,898			502		15
		$	306,531	$	1,316	174		$	44,529		$	1,049	57

Receivables_Tables

Receivables (Tables)	3 Months Ended
	Mar. 31, 2014
Receivables [Abstract]	'
Summary of Accounts Receivable	'
		March 31,		December 31,
		2014		2013
		(In thousands)
	Health Plans segment:
	California	$	134,872	$	148,654
	Florida	3,123		2,901
	Illinois	284		5,773
	Michigan	19,446		15,253
	New Mexico	29,732		17,056
	Ohio	53,493		43,969
	South Carolina	12,612		—
	Texas	11,398		9,736
	Utah	13,700		10,953
	Washington	25,145		13,455
	Wisconsin	7,857		8,087
	Direct delivery and other	9,043		2,463
	Total Health Plans segment	320,705		278,300
	Molina Medicaid Solutions segment	17,527		20,635
		$	338,232	$	298,935

Restricted_Investments_Tables

Restricted Investments (Tables)	3 Months Ended
	Mar. 31, 2014
Investments, Debt and Equity Securities [Abstract]	'
Summary of restricted investments by health plan	'
	The following table presents the balances of restricted investments:
		March 31,		December 31,
		2014		2013
		(In thousands)
	California	$	373	$	373
	Florida	23,317		9,242
	Illinois	310		310
	Michigan	1,014		1,014
	New Mexico	24,625		24,622
	Ohio	9,081		9,080
	South Carolina	4,872		310
	Texas	3,500		3,500
	Utah	3,602		3,301
	Washington	151		151
	Other	885		886
	Total Health Plans segment	71,730		52,789
	Molina Medicaid Solutions segment	10,306		10,304
		$	82,036	$	63,093
Contractual maturities of our held-to-maturity restricted investments	'
	The contractual maturities of our held-to-maturity restricted investments as of March 31, 2014 are summarized below.
		Amortized		Estimated
		Cost		Fair Value
		(In thousands)
	Due in one year or less	$	76,957	$	76,963
	Due one year through five years	5,079		5,083
		$	82,036	$	82,046

Medical_Claims_and_Benefits_Pa1

Medical Claims and Benefits Payable (Tables)	3 Months Ended
	Mar. 31, 2014
Other Liabilities Disclosure [Abstract]	'
Components of change in medical claims and benefits payable	'
		Three Months Ended March 31,						Year Ended
		2014			2013			31-Dec-13
		(Dollars in thousands)
	Balances at beginning of period	$	669,787		$	494,530		$	494,530
	Components of medical care costs related to:
	Current period	1,773,332			1,347,181			5,434,443
	Prior periods	(50,904		)	(58,427		)	(52,779		)
	Total medical care costs	1,722,428			1,288,754			5,381,664
	Change in non-risk provider payables	(28,560		)	(7,638		)	111,267
	Payments for medical care costs related to:
	Current period	1,172,672			948,820			4,932,195
	Prior periods	371,442			335,681			385,479
	Total paid	1,544,114			1,284,501			5,317,674
	Balances at end of period	$	819,541		$	491,145		$	669,787
	Benefit from prior period as a percentage of:
	Balance at beginning of period	7.6		%	11.8		%	10.7		%
	Premium revenue, trailing twelve months	0.8		%	1		%	0.9		%
	Medical care costs, trailing twelve months	0.9		%	1.1		%	1		%

LongTerm_Debt_Tables

Long-Term Debt (Tables)	3 Months Ended
	Mar. 31, 2014
Debt Disclosure [Abstract]	'
Schedule of maturities of long-term debt	'
	As of March 31, 2014, maturities of long-term debt for the years ending December 31 are as follows (in thousands):
		Total		2014		2015		2016		2017		2018		Thereafter
	1.125% Notes	$	550,000	$	—	$	—	$	—	$	—	$	—	$	550,000
	3.75% Notes	187,000		187,000		—		—		—		—		—
		$	737,000	$	187,000	$	—	$	—	$	—	$	—	$	550,000
Long term debt	'
	The principal amounts, unamortized discount and net carrying amounts of the convertible senior notes were as follows:
		Principal Balance		Unamortized Discount		Net Carrying Amount
		(In thousands)
	March 31, 2014:
	1.125% Notes	$	550,000	$	128,996	$	421,004
	3.75% Notes	187,000		3,451		183,549
		$	737,000	$	132,447	$	604,553
	December 31, 2013:
	1.125% Notes	$	550,000	$	133,632	$	416,368
	3.75% Notes	187,000		5,128		181,872
		$	737,000	$	138,760	$	598,240
Debt instruments interest cost recognized	'
		Three Months Ended March 31,
		2014		2013
		(In thousands)
	Interest cost recognized for the period relating to the:
	Contractual interest coupon rate	$	3,300	$	2,527
	Amortization of the discount	6,314		3,723
	Total interest cost recognized	$	9,614	$	6,250

Derivative_Financial_Instrumen1

Derivative Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	'
	The following table summarizes the fair values and the presentation of our derivative financial instruments (defined and discussed individually below) in the consolidated balance sheets:
		Balance Sheet Location	31-Mar-14		31-Dec-13
			(In thousands)
	Derivative asset:
	1.125% Call Option	Non-current assets: Derivative asset	$	196,617	$	186,351
	Derivative liability:
	Embedded cash conversion option	Non-current liabilities: Derivative liability	$	196,503	$	186,239

Segment_Information_Tables

Segment Information (Tables)	3 Months Ended
	Mar. 31, 2014
Segment Reporting [Abstract]	'
Operating segment information	'
	The cost of services shared between the Health Plans and Molina Medicaid Solutions segment is charged to the Health Plans segment.
		Three Months Ended March 31,
		2014		2013
		(In thousands)
	Revenue from continuing operations:
	Health Plans segment:
	Premium revenue	$	1,940,337	$	1,497,433
	Premium tax revenue	51,693		37,000
	Health insurer fee revenue	18,696		—
	Investment income	1,629		1,516
	Other revenue	3,258		4,694
	Molina Medicaid Solutions segment:
	Service revenue	53,630		49,756
		$	2,069,243	$	1,590,399
	Operating income from continuing operations:
	Health Plans segment	$	14,019	$	61,520
	Molina Medicaid Solutions segment	10,248		6,353
	Total operating income from continuing operations	24,267		67,873
	Other expenses, net	13,778		12,906
	Income from continuing operations before income tax expense	$	10,489	$	54,967

Basis_of_Presentation_Details

Basis of Presentation (Details)	3 Months Ended
	Mar. 31, 2014
	Segment
Basis Of Presentation [Line Items]	'
Number of reportable segments	2
Health Plans	'
Basis Of Presentation [Line Items]	'
Number of states in which entity operates	11
Number of members eligible for the health care programs	2,200,000

Significant_Accounting_Policie3

Significant Accounting Policies (Details) (USD $)	3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Schedule of Premium Revenue by Health Plan Type [Line Items]	'	'
Number of categories for component of premium revenue	2	'
Maximum period for member risk scores and member pharmacy cost experience after original year of service	'2 years	'
Anticipated Medicare risk adjustment premiums	$33.40	$20.80
California, Florida, Illinois, New Mexico, Washington	'	'
Schedule of Premium Revenue by Health Plan Type [Line Items]	'	'
Liability recorded related to profit sharing agreement	2	1.4
New Mexico,Texas, and Washington	'	'
Schedule of Premium Revenue by Health Plan Type [Line Items]	'	'
Liability recorded related to profit sharing agreement	$11.10	$2.50
Illinois, New Mexico, Ohio, Texas, Washington, and Wisconsin | Minimum	'	'
Schedule of Premium Revenue by Health Plan Type [Line Items]	'	'
Percentage of incremental revenue earned maximum	1.00%	'
Illinois, New Mexico, Ohio, Texas, Washington, and Wisconsin | Maximum	'	'
Schedule of Premium Revenue by Health Plan Type [Line Items]	'	'
Percentage of incremental revenue earned maximum	5.00%	'

Significant_Accounting_Policie4

Significant Accounting Policies Quality Incentive Premium Revenue Recognized (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Schedule of Premium Revenue by Health Plan Type [Line Items]	'	'
Total premium revenue recognized for state health plans with quality incentive premiums	$1,940,337	$1,497,433
New Mexico, Ohio, Texas, Wisconsin	'	'
Schedule of Premium Revenue by Health Plan Type [Line Items]	'	'
Maximum available quality incentive premium - current period	20,164	20,615
Amount of quality incentive premium revenue recognized in current period: Earned current period	5,297	14,896
Amount of quality incentive premium revenue recognized in current period: Earned prior periods	-378	6,712
Total amount of quality incentive premium revenue recognized in current period:	4,919	21,608
Total premium revenue recognized for state health plans with quality incentive premiums	$1,200,619	$709,383

Significant_Accounting_Policie5

Significant Accounting Policies Income Taxes (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Accounting Policies [Abstract]	'	'	'
Total unrecognized tax benefits	$2,000,000	'	$8,000,000
Unrecognized tax benefits decrease resulting from settlement agreement with a state	6,000,000	'	'
Unrecognized tax benefits that would impact effective tax rate	1,800,000	'	5,700,000
Possible decrease in unrecognized tax benefit liabilities during the next 12 months	200,000	'	'
Interest and penalties accrued related to unrecognized tax benefits	70,000	'	80,000
Tax benefit from discontinued operations	400,000	200,000	'
Health care excise tax expenses	22,190,000	0	'
Estimated excise tax liability	$88,800,000	'	'

Net_Income_Per_Share_Summary_o

Net Income Per Share Summary of Denominators for Computation of Basic and Diluted Earnings Per Share (Detail)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014		Mar. 31, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'		'
Shares outstanding at the beginning of the period	45,871		46,762
Weighted-average number of shares repurchased	0		-867
Weighted-average number of shares issued	150		86
Denominator for basic net income per share	46,021		45,981
Dilutive effect of employee restricted stock awards and stock options	597		462
Dilutive effect of 3.75% Notes	902	[1]	0	[1]
Denominator for diluted net income per share	47,520		46,443
Restricted Stock	'		'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'		'
Antidilutive Securities	192	[1],[2]	203	[1],[2]
Employee Stock Option	'		'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'		'
Antidilutive Securities	45	[1],[2]	26	[1],[2]
1.125% Warrants	'		'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'		'
Antidilutive Securities	13,490	[1],[2]	7,345	[1],[2]
[1]	Potentially dilutive shares issuable pursuant to our 3.75% Notes (defined in Note 11, "Long-Term Debt") were not included in the computation of diluted net income per share for the three months ended March 31, 2013, because to do so would have been anti-dilutive. Potentially dilutive shares issuable pursuant to our 1.125% Warrants (defined in Note 12, "Derivative Financial Instruments") were not included in the computation of diluted net income per share for the three months ended March 31, 2014 and 2013 because to do so would have been anti-dilutive.
[2]	Unvested restricted shares are included in the calculation of diluted net income per share when their grant date fair values are below the average fair value of the common shares for each of the periods presented. Options to purchase common shares are included in the calculation of diluted net income per share when their exercise prices are below the average fair value of the common shares for each of the periods presented.

Business_Combinations_Details

Business Combinations (Details) (USD $)	3 Months Ended		1 Months Ended	12 Months Ended		3 Months Ended	0 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Jan. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Mar. 31, 2014	Apr. 17, 2014
			South Carolina	Number of Member Conversion	Number of Member Conversion	Number of Member Conversion	Subsequent Event
			Community Healthy Solutions of America, Inc.	South Carolina	South Carolina	New Mexico	South Carolina
				Community Healthy Solutions of America, Inc.	Community Healthy Solutions of America, Inc.	Lovelace Community Health Plan	Community Healthy Solutions of America, Inc.
Business Acquisition [Line Items]	'	'	'	'	'	'	'
Payments made in business combinations	$38,119,000	$0	$38,100,000	'	'	'	$11,600,000
Indemnification withhold funds transfer to restricted investment	'	'	4,600,000	'	'	'	'
Contingent consideration liability	'	'	'	'	14,700,000	500,000	'
Change in fair value of contingent consideration liabilities	($4,265,000)	$0	'	($2,700,000)	'	($1,600,000)	'

StockBased_Compensation_Detail

Stock-Based Compensation (Details) (USD $)	3 Months Ended			3 Months Ended	1 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2014	Mar. 31, 2014
			Restricted Stock	Employee Stock Option	March 2014 Grant
					Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Shares awarded	'	'	'	'	356,292
Unrecognized compensation expense	'	'	$37.80	$0.50	'
Weighted average period	'2 years 4 months 18 days	'	'	'	'
Weighted-average period of unvested stock options to be recognized	'	'	'	'1 year 9 months 18 days	'
Fair value of restricted and performance stock awards granted	22.9	19.3	'	'	'
Total fair value of restricted shares vested	$20.90	$13.10	'	'	'

StockBased_Compensation_StockB

Stock-Based Compensation Stock-Based Compensation Expense (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Total share-based compensation expense	$5,596	$4,421
Performance Units	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Total share-based compensation expense	4,608	3,848
Employee stock purchase plan and stock options	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Total share-based compensation expense	$988	$573

StockBased_Compensation_Restri

Stock-Based Compensation Restricted Share Activity (Details) (USD $)	3 Months Ended
	Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]	'
Beginning Balance, Shares	1,299,852
Granted, Shares	628,936
Vested, Shares	-561,407
Forfeited, Shares	-6,125
Ending Balance, Shares	1,361,256
Begining Balance, Weighted Average Grant Date Fair Value	$29.03
Granted, Weighted Average Grant Date Fair Value	$36.46
Vested, Weighted Average Grant Date Fair Value	$27.46
Forfeited, Weighted Average Grant Date Fair Value	$27.36
Ending Balance, Weighted Average Grant Date Fair Value	$33.12

StockBased_Compensation_Stock_

Stock-Based Compensation Stock Option Activity (Details) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]	'
Outstanding beginning balance, Options	379,221
Exercised, Options	-51,750
Outstanding ending balance, Options	327,471
Stock options exercisable and expected to vest ending balance, Options	327,471
Exercisable ending balance, Options	292,471
Weighted Average Exercise Price	'
Outstanding beginning balance, Weighted average exercise price	$24.14
Exercised, Weighted average exercise price	$25.69
Outstanding ending balance, Weighted average exercise price	$23.90
Stock options exercisable and expected to vest ending balance, Weighted average exercise price	$23.90
Exercisable ending balance, Weighted average exercise price	$22.77
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]	'
Outstanding beginning balance, Average intrinsic value	'
Exercised, Average intrinsic value	'
Aggregate intrinsic value, Outstanding ending balance	4,475
Stock options exercisable and expected to vest ending balance, Average intrinsic value	4,475
Exercisable ending balance, Average intrinsic value	$4,325
Outstanding ending balance, Weighted average remaining contractual term	'3 years 6 months 0 days
Stock options exercisable and expected to vest ending balance, Weighted average remaining contractual term	'3 years 6 months 0 days
Exercisable ending balance, Weighted average remaining contractual term	'2 years 10 months 24 days

Fair_Value_Measurements_Detail

Fair Value Measurements (Details)	Mar. 31, 2014
	Participant
Auction rate securities	'
Schedule of Available-for-sale Securities [Line Items]	'
Participants in valuation data pool	10,000
1.125% Notes	'
Schedule of Available-for-sale Securities [Line Items]	'
Percentage of contractual interest rate	1.13%

Fair_Value_Measurements_Fair_V

Fair Value Measurements Fair Value of Financial Instruments on Recurring Basis (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Embedded cash conversion option derivative liability	$196,503	$186,239
Fair Value, Measurements, Recurring | Total Fair Value	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	903,745	900,301
Contingent consideration liabilities	15,164	57,548
Total liability measured at fair value on a recurring basis	211,667	243,787
Fair Value, Measurements, Recurring | Total Fair Value | Corporate debt securities	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	451,682	449,772
Fair Value, Measurements, Recurring | Total Fair Value | Municipal securities	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	99,748	113,330
Fair Value, Measurements, Recurring | Total Fair Value | GSEs	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	69,326	68,817
Fair Value, Measurements, Recurring | Total Fair Value | U.S. treasury notes	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	35,035	37,376
Fair Value, Measurements, Recurring | Total Fair Value | Certificates of deposit	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	40,409	33,757
Fair Value, Measurements, Recurring | Total Fair Value | Auction rate securities	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	10,928	10,898
Fair Value, Measurements, Recurring | Total Fair Value | 1.125% Call Option derivative	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	196,617	186,351
Fair Value, Measurements, Recurring | Total Fair Value | Embedded cash conversion option	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Embedded cash conversion option derivative liability	196,503	186,239
Fair Value, Measurements, Recurring | Level 1	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	104,361	106,193
Contingent consideration liabilities	0	0
Total liability measured at fair value on a recurring basis	0	0
Fair Value, Measurements, Recurring | Level 1 | Corporate debt securities	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	0	0
Fair Value, Measurements, Recurring | Level 1 | Municipal securities	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	0	0
Fair Value, Measurements, Recurring | Level 1 | GSEs	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	69,326	68,817
Fair Value, Measurements, Recurring | Level 1 | U.S. treasury notes	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	35,035	37,376
Fair Value, Measurements, Recurring | Level 1 | Certificates of deposit	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	0	0
Fair Value, Measurements, Recurring | Level 1 | Auction rate securities	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	0	0
Fair Value, Measurements, Recurring | Level 1 | 1.125% Call Option derivative	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	0	0
Fair Value, Measurements, Recurring | Level 1 | Embedded cash conversion option	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Embedded cash conversion option derivative liability	0	0
Fair Value, Measurements, Recurring | Level 2	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	591,839	596,859
Contingent consideration liabilities	0	0
Total liability measured at fair value on a recurring basis	0	0
Fair Value, Measurements, Recurring | Level 2 | Corporate debt securities	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	451,682	449,772
Fair Value, Measurements, Recurring | Level 2 | Municipal securities	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	99,748	113,330
Fair Value, Measurements, Recurring | Level 2 | GSEs	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	0	0
Fair Value, Measurements, Recurring | Level 2 | U.S. treasury notes	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	0	0
Fair Value, Measurements, Recurring | Level 2 | Certificates of deposit	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	40,409	33,757
Fair Value, Measurements, Recurring | Level 2 | Auction rate securities	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	0	0
Fair Value, Measurements, Recurring | Level 2 | 1.125% Call Option derivative	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	0	0
Fair Value, Measurements, Recurring | Level 2 | Embedded cash conversion option	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Embedded cash conversion option derivative liability	0	0
Fair Value, Measurements, Recurring | Level 3	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	207,545	197,249
Contingent consideration liabilities	15,164	57,548
Total liability measured at fair value on a recurring basis	211,667	243,787
Fair Value, Measurements, Recurring | Level 3 | Corporate debt securities	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	0	0
Fair Value, Measurements, Recurring | Level 3 | Municipal securities	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	0	0
Fair Value, Measurements, Recurring | Level 3 | GSEs	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	0	0
Fair Value, Measurements, Recurring | Level 3 | U.S. treasury notes	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	0	0
Fair Value, Measurements, Recurring | Level 3 | Certificates of deposit	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	0	0
Fair Value, Measurements, Recurring | Level 3 | Auction rate securities	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	10,928	10,898
Fair Value, Measurements, Recurring | Level 3 | 1.125% Call Option derivative	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Total assets measured at fair value on a recurring basis	196,617	186,351
Fair Value, Measurements, Recurring | Level 3 | Embedded cash conversion option	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Embedded cash conversion option derivative liability	$196,503	$186,239

Fair_Value_Measurements_Fair_V1

Fair Value Measurements Fair Value of Assets Measured on Recurring Basis Using Unobservable Inputs (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014
Auction rate securities	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'
Beginning Balance	$10,898
Total gains (losses) for the period recognized in other comprehensive income	30
Settlements	0
Ending Balance	10,928
Derivatives, Net	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'
Beginning Balance	112
Total gains (losses) for the period recognized in other comprehensive income	0
Settlements	0
Ending Balance	114
Contingent Consideration Liabilities	'
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'
Beginning Balance	-57,548
Total gains (losses) for the period recognized in other comprehensive income	0
Settlements	38,119
Ending Balance	-15,164
Other expenses, net | Auction rate securities	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'
Total gains (losses) for the period recognized in earnings	0
Other expenses, net | Derivatives, Net	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'
Total gains (losses) for the period recognized in earnings	2
Other expenses, net | Contingent Consideration Liabilities	'
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'
Total gains (losses) for the period recognized in earnings	0
General and administrative expenses | Auction rate securities	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'
Total gains (losses) for the period recognized in earnings	0
General and administrative expenses | Derivatives, Net	'
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'
Total gains (losses) for the period recognized in earnings	0
General and administrative expenses | Contingent Consideration Liabilities	'
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'
Total gains (losses) for the period recognized in earnings	$4,265

Fair_Value_Measurements_Detail1

Fair Value Measurements Details of Long-Term Debt (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Level 1	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of debt	$0	$0
Level 1 | 1.125% Notes	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of debt	0	0
Level 1 | 3.75% Notes	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of debt	0	0
Level 2	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of debt	844,388	792,118
Level 2 | 1.125% Notes	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of debt	615,313	572,627
Level 2 | 3.75% Notes	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of debt	229,075	219,491
Level 3	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of debt	0	0
Level 3 | 1.125% Notes	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of debt	0	0
Level 3 | 3.75% Notes	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of debt	0	0
Carrying Value	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of debt	604,553	598,240
Carrying Value | 1.125% Notes	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of debt	421,004	416,368
Carrying Value | 3.75% Notes	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of debt	183,549	181,872
Total Fair Value	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of debt	844,388	792,118
Total Fair Value | 1.125% Notes	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of debt	615,313	572,627
Total Fair Value | 3.75% Notes	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of debt	$229,075	$219,491

Investments_Details

Investments (Details) (USD $)	3 Months Ended		75 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2008
Schedule of Available-for-sale Securities [Line Items]	'	'	'	'	'
Auction rate securities at par value	$707,128,000	'	$707,128,000	$713,950,000	'
Pretax unrealized gains	1,426,000	419,000	'	'	'
Auction rate securities	'	'	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'	'	'
Auction rate securities at par value	10,928,000	'	10,928,000	10,898,000	82,100,000
Auction rate securities at par value, settled	'	'	70,700,000	'	'
Pretax unrealized gains	$30,000	$300,000	'	'	'
Auction rate securities | Minimum	'	'	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'	'	'
Maturity period of securities	'17 years	'	'	'	'
Auction rate securities | Maximum	'	'	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'	'	'
Maturity period of securities	'32 years	'	'	'	'

Investments_Summary_of_Investm

Investments Summary of Investments (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2008
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Amortized Cost	$707,454	$715,702	'
Gross Unrealized Gains	959	613	'
Gross Unrealized Losses	1,285	2,365	'
Estimated Fair Value	707,128	713,950	'
Subtotal - current investments	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Amortized Cost	696,054	704,302	'
Gross Unrealized Gains	959	613	'
Gross Unrealized Losses	813	1,863	'
Estimated Fair Value	696,200	703,052	'
Corporate debt securities	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Amortized Cost	451,484	450,162	'
Gross Unrealized Gains	613	442	'
Gross Unrealized Losses	415	832	'
Estimated Fair Value	451,682	449,772	'
GSEs	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Amortized Cost	69,379	68,898	'
Gross Unrealized Gains	18	6	'
Gross Unrealized Losses	71	87	'
Estimated Fair Value	69,326	68,817	'
Municipal securities	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Amortized Cost	99,775	114,126	'
Gross Unrealized Gains	266	119	'
Gross Unrealized Losses	293	915	'
Estimated Fair Value	99,748	113,330	'
U.S. treasury notes	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Amortized Cost	35,004	37,360	'
Gross Unrealized Gains	57	44	'
Gross Unrealized Losses	26	28	'
Estimated Fair Value	35,035	37,376	'
Certificates of deposit	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Amortized Cost	40,412	33,756	'
Gross Unrealized Gains	5	2	'
Gross Unrealized Losses	8	1	'
Estimated Fair Value	40,409	33,757	'
Auction rate securities	'	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'	'
Amortized Cost	11,400	11,400	'
Gross Unrealized Gains	0	0	'
Gross Unrealized Losses	472	502	'
Estimated Fair Value	$10,928	$10,898	$82,100

Investments_Contractual_Maturi

Investments Contractual Maturities of Investments (Details) (USD $)	Mar. 31, 2014
In Thousands, unless otherwise specified
Investments, Debt and Equity Securities [Abstract]	'
Due in one year or less, Cost	$329,504
Due one year through five years, Cost	366,550
Due after ten years, Cost	11,400
Total, Amortized Cost	707,454
Due in one year or less, Estimated Fair Value	329,633
Due one year through five years, Estimated Fair Value	366,567
Due after ten years, Estimated Fair Value	10,928
Total, Estimated Fair Value	$707,128

Investments_AvailableforSale_I

Investments Available-for-Sale Investments (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Security	Security
Schedule of Available-for-sale Securities [Line Items]	'	'
In a Continuous Loss Position for Less than 12 Months, Estimated Fair Value	$199,654	$306,531
In a Continuous Loss Position for Less than 12 Months, Unrealized Losses	541	1,316
In a Continuous Loss Position for Less than 12 Months, Total Number of Securities	143	174
In a Continuous Loss Position for 12 Months or More, Estimated Fair value	55,383	44,529
In a Continuous Loss Position for 12 Months or More, Unrealized Losses	744	1,049
In a Continuous Loss Position for 12 Months or More, Total Number of Securities	56	57
Corporate debt securities	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
In a Continuous Loss Position for Less than 12 Months, Estimated Fair Value	137,383	210,057
In a Continuous Loss Position for Less than 12 Months, Unrealized Losses	334	802
In a Continuous Loss Position for Less than 12 Months, Total Number of Securities	64	91
In a Continuous Loss Position for 12 Months or More, Estimated Fair value	11,829	2,540
In a Continuous Loss Position for 12 Months or More, Unrealized Losses	81	30
In a Continuous Loss Position for 12 Months or More, Total Number of Securities	5	3
Municipal securities	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
In a Continuous Loss Position for Less than 12 Months, Estimated Fair Value	14,143	30,715
In a Continuous Loss Position for Less than 12 Months, Unrealized Losses	110	398
In a Continuous Loss Position for Less than 12 Months, Total Number of Securities	18	49
In a Continuous Loss Position for 12 Months or More, Estimated Fair value	27,085	31,091
In a Continuous Loss Position for 12 Months or More, Unrealized Losses	183	517
In a Continuous Loss Position for 12 Months or More, Total Number of Securities	30	39
GSEs	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
In a Continuous Loss Position for Less than 12 Months, Estimated Fair Value	28,741	53,308
In a Continuous Loss Position for Less than 12 Months, Unrealized Losses	63	87
In a Continuous Loss Position for Less than 12 Months, Total Number of Securities	11	21
In a Continuous Loss Position for 12 Months or More, Estimated Fair value	5,541	0
In a Continuous Loss Position for 12 Months or More, Unrealized Losses	8	0
In a Continuous Loss Position for 12 Months or More, Total Number of Securities	6	0
U.S. treasury notes	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
In a Continuous Loss Position for Less than 12 Months, Estimated Fair Value	8,821	12,037
In a Continuous Loss Position for Less than 12 Months, Unrealized Losses	26	28
In a Continuous Loss Position for Less than 12 Months, Total Number of Securities	7	11
In a Continuous Loss Position for 12 Months or More, Estimated Fair value	0	0
In a Continuous Loss Position for 12 Months or More, Unrealized Losses	0	0
In a Continuous Loss Position for 12 Months or More, Total Number of Securities	0	0
Certificates of deposit	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
In a Continuous Loss Position for Less than 12 Months, Estimated Fair Value	10,566	414
In a Continuous Loss Position for Less than 12 Months, Unrealized Losses	8	1
In a Continuous Loss Position for Less than 12 Months, Total Number of Securities	43	2
In a Continuous Loss Position for 12 Months or More, Estimated Fair value	0	0
In a Continuous Loss Position for 12 Months or More, Unrealized Losses	0	0
In a Continuous Loss Position for 12 Months or More, Total Number of Securities	0	0
Auction rate securities	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
In a Continuous Loss Position for Less than 12 Months, Estimated Fair Value	0	0
In a Continuous Loss Position for Less than 12 Months, Unrealized Losses	0	0
In a Continuous Loss Position for Less than 12 Months, Total Number of Securities	0	0
In a Continuous Loss Position for 12 Months or More, Estimated Fair value	10,928	10,898
In a Continuous Loss Position for 12 Months or More, Unrealized Losses	$472	$502
In a Continuous Loss Position for 12 Months or More, Total Number of Securities	15	15

Receivables_Summary_of_Account

Receivables Summary of Accounts Receivable (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total receivables	$338,232	$298,935
Health Plans	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total receivables	320,705	278,300
Medicaid Solutions Segment	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total receivables	17,527	20,635
California | Health Plans	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total receivables	134,872	148,654
Florida | Health Plans	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total receivables	3,123	2,901
Illinois | Health Plans	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total receivables	284	5,773
Michigan | Health Plans	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total receivables	19,446	15,253
New Mexico | Health Plans	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total receivables	29,732	17,056
Ohio | Health Plans	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total receivables	53,493	43,969
South Carolina | Health Plans	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total receivables	12,612	0
Texas | Health Plans	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total receivables	11,398	9,736
Utah | Health Plans	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total receivables	13,700	10,953
Washington | Health Plans	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total receivables	25,145	13,455
Wisconsin | Health Plans	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total receivables	7,857	8,087
Direct delivery and other | Health Plans	'	'
Financing Receivable, Recorded Investment, Past Due [Line Items]	'	'
Total receivables	$9,043	$2,463

Restricted_Investments_Summary

Restricted Investments Summary of Restricted Investments by Health Plan (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Held-to-maturity Securities [Line Items]	'	'
Restricted investments by health plan	$82,036	$63,093
Health Plans	'	'
Schedule of Held-to-maturity Securities [Line Items]	'	'
Restricted investments by health plan	71,730	52,789
Health Plans | California	'	'
Schedule of Held-to-maturity Securities [Line Items]	'	'
Restricted investments by health plan	373	373
Health Plans | Florida	'	'
Schedule of Held-to-maturity Securities [Line Items]	'	'
Restricted investments by health plan	23,317	9,242
Health Plans | Illinois	'	'
Schedule of Held-to-maturity Securities [Line Items]	'	'
Restricted investments by health plan	310	310
Health Plans | Michigan	'	'
Schedule of Held-to-maturity Securities [Line Items]	'	'
Restricted investments by health plan	1,014	1,014
Health Plans | New Mexico	'	'
Schedule of Held-to-maturity Securities [Line Items]	'	'
Restricted investments by health plan	24,625	24,622
Health Plans | Ohio	'	'
Schedule of Held-to-maturity Securities [Line Items]	'	'
Restricted investments by health plan	9,081	9,080
Health Plans | South Carolina	'	'
Schedule of Held-to-maturity Securities [Line Items]	'	'
Restricted investments by health plan	4,872	310
Health Plans | Texas	'	'
Schedule of Held-to-maturity Securities [Line Items]	'	'
Restricted investments by health plan	3,500	3,500
Health Plans | Utah	'	'
Schedule of Held-to-maturity Securities [Line Items]	'	'
Restricted investments by health plan	3,602	3,301
Health Plans | Washington	'	'
Schedule of Held-to-maturity Securities [Line Items]	'	'
Restricted investments by health plan	151	151
Health Plans | Direct delivery and other	'	'
Schedule of Held-to-maturity Securities [Line Items]	'	'
Restricted investments by health plan	885	886
Medicaid Solutions Segment	'	'
Schedule of Held-to-maturity Securities [Line Items]	'	'
Restricted investments by health plan	$10,306	$10,304

Restricted_Investments_Contrac

Restricted Investments Contractual Maturities of Our Held-to-Maturity Restricted Investments (Details) (USD $)	Mar. 31, 2014
In Thousands, unless otherwise specified
Investments, Debt and Equity Securities [Abstract]	'
Amortized Cost, Due in one year or less	$76,957
Amortized Cost, Due one year through five years	5,079
Amortized Cost, Total	82,036
Estimated Fair Value, Due in one year or less	76,963
Estimated Fair Value, Due one year through five years	5,083
Estimated Fair Value, Total	$82,046

Medical_Claims_and_Benefits_Pa2

Medical Claims and Benefits Payable Components of Change in Medical Claims and Benefits Payable (Details) (USD $)	3 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Insurance Claims [Roll Forward]	'	'	'
Balances at beginning of period	$669,787	$494,530	$494,530
Components of medical care costs related to:	'	'	'
Current period	1,773,332	1,347,181	5,434,443
Prior periods	-50,904	-58,427	-52,779
Total medical care costs	1,722,428	1,288,754	5,381,664
Change in non-risk provider payables	-28,560	-7,638	111,267
Payments for medical care costs related to:	'	'	'
Current period	1,172,672	948,820	4,932,195
Prior periods	371,442	335,681	385,479
Total paid	1,544,114	1,284,501	5,317,674
Balances at end of period	$819,541	$491,145	$669,787
Benefit from prior period as a percentage of:	'	'	'
Balance at beginning of period	7.60%	11.80%	10.70%
Premium revenue, trailing twelve months	0.80%	1.00%	0.90%
Medical care costs, trailing twelve months	0.90%	1.10%	1.00%

Medical_Claims_and_Benefits_Pa3

Medical Claims and Benefits Payable (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Mar. 31, 2014	Mar. 31, 2014	Jan. 02, 2014	Jan. 02, 2014
				Minimum	Maximum	South Carolina	Medicaid Expansion
						member	member
Insurance Claims [Line Items]	'	'	'	'	'	'	'
Medical claims and benefits payable	$122,700,000	'	$151,300,000	'	'	'	'
Percentage of liability for unpaid claims not paid out	'	'	'	8.00%	10.00%	'	'
Policy holder benefits prior percentage	7.60%	11.80%	10.70%	'	'	'	'
Favorable prior period claims development	$50,904,000	$58,427,000	$52,779,000	'	'	'	'
Number of new members	'	'	'	'	'	126,000	133,000

LongTerm_Debt_Maturities_of_Lo

Long-Term Debt Maturities of Long-Term Debt (Details) (USD $)	Mar. 31, 2014
In Thousands, unless otherwise specified
Schedule of Maturities of Long-term Debt [Line Items]	'
Total	$737,000
2014	187,000
2015	0
2016	0
2017	0
2018	0
Thereafter	550,000
1.125% Notes	'
Schedule of Maturities of Long-term Debt [Line Items]	'
Total	550,000
2014	0
2015	0
2016	0
2017	0
2018	0
Thereafter	550,000
3.75% Notes	'
Schedule of Maturities of Long-term Debt [Line Items]	'
Total	187,000
2014	187,000
2015	0
2016	0
2017	0
2018	0
Thereafter	$0

LongTerm_Debt_Schedule_of_Long

Long-Term Debt Schedule of Long-Term Debt (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Details of the liability component:	'	'
Principal Balance	$737,000	$737,000
Unamortized Discount	132,447	138,760
Net Carrying Amount	604,553	598,240
1.125% Notes	'	'
Details of the liability component:	'	'
Principal Balance	550,000	550,000
Unamortized Discount	128,996	133,632
Net Carrying Amount	421,004	416,368
3.75% Notes	'	'
Details of the liability component:	'	'
Principal Balance	187,000	187,000
Unamortized Discount	3,451	5,128
Net Carrying Amount	$183,549	$181,872

LongTerm_Debt_Interest_Cost_Re

Long-Term Debt Interest Cost Recognized (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Interest cost recognized for the period relating to the:	'	'
Contractual interest coupon rate	$3,300	$2,527
Amortization of the discount	6,314	3,723
Total interest cost recognized	$9,614	$6,250

LongTerm_Debt_Details

Long-Term Debt (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Feb. 15, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Mar. 31, 2014	Mar. 31, 2014	Dec. 31, 2013	Jun. 12, 2013	Mar. 31, 2014
			1.125% Notes	1.125% Notes	1.125% Notes	1.125% Notes	1.125% Notes	3.75% Notes	3.75% Notes	June 2013 Transactions	February 2013 Transactions
						Semi-annual Interest, First Payment	Semi-annual Interest, Second Payment			property	Construction projects
Convertible Debt [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Aggregate principal amount of convertible senior notes	'	'	$550,000,000	'	'	'	'	$187,000,000	'	'	'
Debt instrument issuance date	'	'	15-Feb-13	'	'	'	'	'	'	'	'
Frequency of periodic payment on Senior Notes	'	'	'	'	'	'1/15/2013	'7/15/2013	'	'	'	'
Percentage of contractual interest rate	'	'	'	1.13%	'	'	'	3.75%	'	'	'
Interest payment commencement date	'	'	'	15-Jul-13	'	'	'	'	'	'	'
Senior notes conversion ratio	'	'	'	24.5277	'	'	'	31.9601	'	'	'
Conversion price per share of common stock	'	'	'	$40.77	'	'	'	$31.29	'	'	'
Senior note effective interest rate	'	'	'	5.90%	'	'	'	7.50%	'	'	'
Senior Notes maturity date	'	'	'	15-Jan-20	'	'	'	'	'	'	'
Senior notes amortization period	'	'	'	'5 years 9 months 15 days	'	'	'	'6 months	'	'	'
Senior Notes [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Maturity period based on US government securities	'	'	'	'	'	'	'	'7 years	'	'	'
Senior notes debt maturity date	'	'	'	'	'	'	'	1-Oct-14	'	'	'
Convertible debt, if-converted value in excess of principal	'	'	'	'	'	'	'	37,000,000	11,000,000	'	'
Convertible debt carrying amount of equity component	'	'	'	'	'	'	'	24,000,000	'	'	'
Sale Leaseback Transaction, Net Book Value [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Number of sale leaseback properties	'	'	'	'	'	'	'	'	'	2	'
Sale leaseback transaction term of lease	'	'	'	'	'	'	'	'	'	'25 years	'
Property, equipment, and capitalized software, net	310,364,000	292,083,000	'	'	'	'	'	'	'	'	34,100,000
Lease financing obligations	'	'	'	'	'	'	'	'	'	'	34,800,000
Principal amount	$737,000,000	$737,000,000	'	$550,000,000	$550,000,000	'	'	$187,000,000	$187,000,000	'	'

Derivative_Financial_Instrumen2

Derivative Financial Instruments Fair Value on Consolidated Balance Sheets (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Non-current asset | 1.125% Call Option	'	'
Derivative [Line Items]	'	'
Derivative assets	$196,617	$186,351
Non-current liabilities | Embedded cash conversion option	'	'
Derivative [Line Items]	'	'
Derivative liabilities	$196,503	$186,239

Stockholders_Equity_Details

Stockholders' Equity (Details) (USD $)	0 Months Ended	3 Months Ended
	Sep. 30, 2013	Mar. 31, 2014	Mar. 31, 2013
Stockholders' Equity Note [Abstract]	'	'	'
Decrease in stockholders' equity	'	$4,800,000	'
Trading days measurement period	'	'160 days	'
Net income	'	4,498,000	29,915,000
Warrants issued	'	13,490,236	'
Warrant, strike price per share	'	53.8475	'
Authorized repurchase amount	50,000,000	'	'
Remaining authorized balance available to repurchase stock	'	$47,300,000	'
Number of common stock issued	'	391,000	'

Segment_Information_Details

Segment Information (Details)	3 Months Ended
	Mar. 31, 2014
	Segment
Segment Reporting [Abstract]	'
Number of reportable segments	2

Segment_Information_Schedule_o

Segment Information Schedule of Operating Segment Information (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Health Plans:	'	'
Premium revenue	$1,940,337	$1,497,433
Premium tax revenue	51,693	37,000
Health insurer fee revenue	18,696	0
Investment income	1,629	1,516
Other revenue	3,258	4,694
Molina Medicaid Solutions:	'	'
Service revenue	53,630	49,756
Total revenue	2,069,243	1,590,399
Operating income from continuing operations:	'	'
Health Plans	24,267	67,873
Other expenses, net	13,778	12,906
Income (loss) before income taxes	10,489	54,967
Health Plans	'	'
Health Plans:	'	'
Premium revenue	1,940,337	1,497,433
Premium tax revenue	51,693	37,000
Health insurer fee revenue	18,696	0
Investment income	1,629	1,516
Other revenue	3,258	4,694
Operating income from continuing operations:	'	'
Health Plans	14,019	61,520
Molina Medicaid Solutions	'	'
Molina Medicaid Solutions:	'	'
Service revenue	53,630	49,756
Operating income from continuing operations:	'	'
Health Plans	$10,248	$6,353

Commitments_and_Contingencies_

Commitments and Contingencies (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Mar. 25, 2014	Apr. 07, 2014
In Millions, unless otherwise specified			California Department of Health Care Services	Washington Health Plan Litigation	Subsequent Event
			California	Washington	Washington Health Plan Litigation
					Washington
Other Commitments [Line Items]	'	'	'	'	'
Maximum alternative minimum payment upon expiration of the settlement agreement	'	'	$40	'	'
Plan rate settlement deficit, net of valuation discount	'	'	5	'	'
Plan rate settlement deficit, valuation discount	'	'	0.3	'	'
Alleged overpayment by HCA related to COPES members enrollment	'	'	'	14.4	'
Alleged overpayment by HCA related to drug claims	'	'	'	'	5.8
Net assets of subsidiaries subject to restrictions	592	608	'	'	'
Restricted cash and investments	339.8	365.2	'	'	'
Aggregate statutory capital and surplus	641	'	'	'	'
Required minimum statutory capital surplus	$410	'	'	'	'

Related_Party_Transactions_Det

Related Party Transactions (Details) (6th & Pine Development, LLC, USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Feb. 27, 2013
		property
Related Party Transaction [Line Items]	'	'
Lease expiration date	31-Dec-24	'
Property Subject to Operating Lease	'	'
Related Party Transaction [Line Items]	'	'
Number of office buildings leased	'	2
Number of office building lease that is under construction	'	1
Annual rental increase percentage	3.75%	'
Property Subject to Operating Lease | Building A	'	'
Related Party Transaction [Line Items]	'	'
Lease commencement date	1-Jun-13	'
Initial annual rental expense	3	'
Property Subject to Operating Lease | Building B	'	'
Related Party Transaction [Line Items]	'	'
Lease commencement date	1-Sep-14	'
Number of extension option	'	2
Initial annual rental expense	4	'

Variable_Interest_Entities_Det

Variable Interest Entities (Details) (Variable Interest Entity, Primary Beneficiary, USD $)	Mar. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Variable Interest Entity, Primary Beneficiary	'	'
Variable Interest Entity [Line Items]	'	'
Total carrying amount of assets	$8.90	$6.90
Total amount of liabilities	$8.60	$6.60