Annual Percentage Increase To Debt Instrument Basis Spread On Variable Rate, In The Event Of Default

No definition available.

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- Definition

Debt Instrument, Convertible, Debt Principal Amount

+ References

No definition available.

+ Details

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- Definition

Debt Instrument, Convertible, Equity Shares

+ References

No definition available.

+ Details

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- Definition

Debt Instrument, Convertible, Threshold Business Day Period After Consecutive Trading Day Period

+ References

No definition available.

+ Details

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- Definition

Upon the occurrence of a change of control triggering event specified in the Indenture, the Company must offer to purchase the Senior Notes at a redemption price expressed as percentage of the principal amount thereof, plus accrued and unpaid interest, if any, to the date of purchase.

+ References

No definition available.

+ Details

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- Definition

The minimum fixed charge ratio, as defined in the line of credit agreement, which the reporting entity must maintain in order to be in compliance with the terms of the line of credit facility.

+ References

No definition available.

+ Details

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- Definition

Line of Credit Facility, Additional Borrowing Available

+ References

No definition available.

+ Details

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- Definition

Percentage Of Notes That Can Be Redeemed At Company's Discretion

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

The price per share of the conversion feature embedded in the debt instrument.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6928298&loc=SL6031898-161870

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instruments must exceed threshold percentage for a specified number of trading days to trigger conversion feature, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Minimum percentage of common stock price to conversion price of convertible debt instruments to determine eligibility of conversion.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

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

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph e
-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Indebtedness divided by net capital.

+ References

No definition available.

+ Details

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- Details

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Financial Commitments (Narrative) (Details) - USD ($)		1 Months Ended	3 Months Ended
Financial Commitments (Narrative) (Details) - USD ($)	Apr. 20, 2017	Apr. 20, 2017	Mar. 31, 2017
Letters Of Credit [Member]
Debt Instrument [Line Items]
Face amount			$ 150,000,000
Letters of credit outstanding			200,000
Letters Of Credit [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Face amount	$ 150,000,000	$ 150,000,000
Applicable margin and letter of credit fees will be increased percentage per annum.	2.00%
Swingline Loans [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Face amount	$ 10,000,000	10,000,000
Convertible Notes [Member]
Debt Instrument [Line Items]
Face amount			$ 200,000,000
Interest rate			2.875%
Maturity date			Jun. 15, 2021
Percentage of conversion price			130.00%
Conversion price, shares			33.0579
Conversion price			$ 30.25
Effective interest rates			9.39%
Convertible Notes [Member] \| Circumstance One [Member]
Debt Instrument [Line Items]
Business day period after consecutive trading day period			5 days
Consecutive trading day period			10 days
Percentage of conversion price			98.00%
Conversion price, principal amount			$ 1,000
Convertible Notes [Member] \| Circumstance Two [Member]
Debt Instrument [Line Items]
Business day period after consecutive trading day period			20 days
Percentage of conversion price			130.00%
Conversion price			$ 39.32
Term Loan [Member]
Debt Instrument [Line Items]
Face amount			$ 250,000,000
2010 Senior Notes [Member]
Debt Instrument [Line Items]
Face amount			$ 300,000,000
Interest rate			7.625%
Maturity date			Nov. 01, 2018
Effective interest rates			7.99%
2017 Senior Notes [Member] \| Private Placement [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Face amount	$ 500,000,000	$ 500,000,000
Interest rate	6.875%	6.875%
Redemption price, change of control triggering event (as a percent)		101.00%
2017 Senior Notes [Member] \| Circumstance One [Member] \| Private Placement [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Redemption price		100.00%
2017 Senior Notes [Member] \| Circumstance Two [Member] \| Private Placement [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Redemption price		106.875%
Minimum [Member[ \| Convertible Notes [Member] \| Circumstance Two [Member]
Debt Instrument [Line Items]
Consecutive trading day period			30 days
Maximum [Member] \| 2017 Senior Notes [Member] \| Circumstance Two [Member] \| Private Placement [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Percentage of notes that can be redeemed		40.00%
2014 Credit Facility [Member]
Debt Instrument [Line Items]
Maturity date			May 01, 2018
Effective interest rates			9.86%
2017 Credit Facility [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Maturity date	Apr. 20, 2022
Additional borrowing	$ 150,000,000	$ 150,000,000
Fixed charge coverage ratio	1.25
2017 Credit Facility [Member] \| Minimum [Member[ \| Subsequent Event [Member]
Debt Instrument [Line Items]
Consolidated leverage ratio	3.25	3.25
2017 Credit Facility [Member] \| Maximum [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Consolidated leverage ratio	4.00	4.00
2014 Revolver [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 300,000,000
Available borrowing capacity			$ 114,800,000
2014 Revolver [Member] \| LIBOR \| Minimum [Member[ \| Term Loan [Member]
Debt Instrument [Line Items]
Basis points added to reference rate (as a percent)			1.25%
2014 Revolver [Member] \| LIBOR \| Maximum [Member] \| Term Loan [Member]
Debt Instrument [Line Items]
Basis points added to reference rate (as a percent)			3.00%
2017 Revolver [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 350,000,000	$ 350,000,000
2017 Revolver [Member] \| LIBOR \| Subsequent Event [Member]
Debt Instrument [Line Items]
Basis points added to reference rate (as a percent)	2.50%
2017 Revolver [Member] \| LIBOR \| Circumstance Three [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Basis points added to reference rate (as a percent)	1.00%
2017 Revolver [Member] \| LIBOR \| Minimum [Member[ \| Subsequent Event [Member]
Debt Instrument [Line Items]
Basis points added to reference rate (as a percent)	1.50%
2017 Revolver [Member] \| LIBOR \| Maximum [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Basis points added to reference rate (as a percent)	3.00%
2017 Revolver [Member] \| Base Rate [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Interest rate	0.00%	0.00%
Basis points added to reference rate (as a percent)	1.50%
2017 Revolver [Member] \| Base Rate [Member] \| Minimum [Member[ \| Subsequent Event [Member]
Debt Instrument [Line Items]
Basis points added to reference rate (as a percent)	0.50%
2017 Revolver [Member] \| Base Rate [Member] \| Maximum [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Basis points added to reference rate (as a percent)	2.00%
2017 Revolver [Member] \| Federal Funds Rate [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Basis points added to reference rate (as a percent)	0.50%