Additional Interest Payable Percentage In Case of Default, per Quarter

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- Definition

Cash Interest Expense

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- Definition

Line of credit facility option to increase borrowing capacity.

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- Definition

Maximum Additional Interest Payable Percentage In Case of Default, per annum

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No definition available.

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- Definition

Maximum aggregate principal amount of the Notes redeemable using proceeds of certain equity offerings.

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- Definition

Minimum aggregate principal amount of the Notes remaining outstanding after redemption using proceeds of certain equity offerings.

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No definition available.

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- Definition

Minimum percentage of aggregate principal amount of Notes required to declare the principal amount plus accrued and unpaid interest on the Notes to be immediately due and payable in event of default.

+ References

No definition available.

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- Definition

Number Of Convertible Senior Note Repurchased

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- Definition

Percentage of principal amount of notes required to be offered to purchase the Notes if we make certain asset sales and do not reinvest the proceeds or use such proceeds to repay certain debt.

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No definition available.

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- Definition

Percentage of principal amount of notes required to be offered to purchase the Notes upon a change in control (as defined in the Indenture).

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No definition available.

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- Definition

Percentage of principal required to redeem Note.

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No definition available.

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- Definition

Sublimit For Loans In Certain Foreign Currencies

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No definition available.

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- Definition

Sublimit For Swingline Loans

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No definition available.

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- Definition

Sublimit For The Issuance Of Letters Of Credit

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No definition available.

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

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- Definition

Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

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- Definition

Face (par) amount of debt instrument at time of issuance.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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- Definition

Maximum contractual interest rate for funds borrowed, under the debt agreement.

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- Definition

Minimum contractual interest rate for funds borrowed, under the debt agreement.

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- Definition

Weighted average interest rate of debt outstanding.

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No definition available.

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- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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- Definition

The cash inflow from the issuance of long-term debt that is not secured by collateral. Excludes proceeds from tax exempt unsecured debt.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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The cash outflow from the repayment of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder.

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Number of shares issued during the period as a result of the conversion of convertible securities.

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Debt and Other Long-Term Liabilities (Narrative) (Details) (USD $)	12 Months Ended			0 Months Ended		3 Months Ended
	Dec. 31, 2014 Quantity	Dec. 31, 2013	Dec. 31, 2012	Mar. 12, 2013	Jun. 09, 2014	Dec. 31, 2014	Sep. 30, 2009
Debt Instrument [Line Items]
Cash interest expense	$ 41,562,000outr_CashInterestExpense	$ 25,289,000outr_CashInterestExpense	$ 12,833,000outr_CashInterestExpense
Proceeds from issuance of senior unsecured notes	295,500,000	343,769,000	0
Loss on extinguishment of debt	2,018,000	6,013,000	953,000
Debt outstanding	956,250,000us-gaap_DebtInstrumentCarryingAmount	745,523,000us-gaap_DebtInstrumentCarryingAmount				956,250,000us-gaap_DebtInstrumentCarryingAmount
Number of notes retired	51,148
Conversion of debt, cash	51,149,000us-gaap_RepaymentsOfConvertibleDebt	172,211,000us-gaap_RepaymentsOfConvertibleDebt	20,575,000us-gaap_RepaymentsOfConvertibleDebt
Senior Notes \| Original Notes [Member]
Debt Instrument [Line Items]
Principal amount of debt				350,000,000
Interest rate, per year				6.00%
Proceeds from issuance of senior unsecured notes				343,800,000
Senior Notes \| Senior Unsecured Notes due 2021
Debt Instrument [Line Items]
Interest rate, per year					5.875%
Proceeds from issuance of senior unsecured notes					294,000,000
Percentage of principal amount of notes required to be offered to purchase the Notes upon a change in control	101.00%					101.00%
Percentage of principal amount of notes required to be offered to purchase the Notes if certain asset sales are made	100.00%					100.00%
Minimum percentage of aggregate principal amount of Notes required to declare the principal amount plus accrued and unpaid interest on the Notes to be immediately due and payable in event of default	25.00%					25.00%
Additional interest payable, per annum, following a registration default, percentage	0.25%					0.25%
Maximum additional interest payable, per annum, following a registration default, percentage	1.00%					1.00%
Debt outstanding	300,000,000					300,000,000
Credit Facility \| Federal Funds Effective Swap Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable interest rate						0.50%
Stated interest rate, minimum						0.25%
Stated interest rate, maximum						1.00%
Credit Facility \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Basis spread on variable interest rate						1.00%
Stated interest rate, minimum						1.25%
Stated interest rate, maximum						2.00%
Convertible Notes
Debt Instrument [Line Items]
Interest rate, per year	4.00%					4.00%	4.00%
Loss on extinguishment of debt	300,000
Debt outstanding		51,148,000
Conversion of debt, cash	51,100,000
Period, June 15, 2017 To June 14, 2018 [Member] \| Senior Notes \| Senior Unsecured Notes due 2021
Debt Instrument [Line Items]
Redemption rate	104.406%					104.406%
Period, June 9, 2014 To June 14, 2017 [Member] \| Senior Notes \| Senior Unsecured Notes due 2021
Debt Instrument [Line Items]
Maximum aggregate principal amount of notes redeemable	35.00%					35.00%
Minimum aggregate principal amount of Notes outstanding after redemption	65.00%					65.00%
Period, June 15, 2018 To June 14, 2019 [Member] \| Senior Notes \| Senior Unsecured Notes due 2021
Debt Instrument [Line Items]
Redemption rate	102.938%					102.938%
Period, June 15, 2019 To June 14, 2020 [Member] \| Senior Notes \| Senior Unsecured Notes due 2021
Debt Instrument [Line Items]
Redemption rate	101.469%					101.469%
Period, June 15, 2020 To June 15, 2021 [Member] \| Senior Notes \| Senior Unsecured Notes due 2021
Debt Instrument [Line Items]
Redemption rate	100.00%					100.00%
Revolving Line of Credit \| Credit Facility
Debt Instrument [Line Items]
Loss on extinguishment of debt						1,700,000
Line of credit facility, maximum borrowing capacity	600,000,000.0					600,000,000.0
Sublimit for issuance of letters of credit	75,000,000.0					75,000,000.0
Sublimit for swingline loans	50,000,000.0					50,000,000.0
Sublimit for loans in certain foreign countries	75,000,000.0					75,000,000.0
Line of credit facility, option to increase borrowing capacity	200,000,000.0					200,000,000.0
Debt outstanding	160,000,000	0				160,000,000
Term Loans
Debt Instrument [Line Items]
Interest rate on amounts outstanding under the credit facility	1.92%					1.92%
Term Loans \| Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	150,000,000.0					150,000,000.0
Debt outstanding	$ 146,250,000	$ 344,375,000				146,250,000
Common Stock [Member]
Debt Instrument [Line Items]
Conversion of debt, issuance of common stock (shares)	431,760	272,336
Scenario One [Member] \| Period, June 9, 2014 To June 14, 2017 [Member] \| Senior Notes \| Senior Unsecured Notes due 2021
Debt Instrument [Line Items]
Redemption rate	100.00%					100.00%
Scenario Two [Member] \| Period, June 9, 2014 To June 14, 2017 [Member] \| Senior Notes \| Senior Unsecured Notes due 2021
Debt Instrument [Line Items]
Redemption rate	105.875%					105.875%