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.

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)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 20
-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 16
-Article 9

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- 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.

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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

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Debt - Debt Covenants (Narrative) (Details) - USD ($)	Dec. 31, 2016	Apr. 28, 2016	Aug. 31, 2015	Aug. 05, 2015
Debt Instrument [Line Items]
Debt, carrying amount	$ 1,065,296,000
Incremental Term Loan Agreement
Debt Instrument [Line Items]
Debt, carrying amount		$ 300,000,000
Term Loan Facility \| Term Credit Agreement borrowings due 2024 at a variable interest rate of 2.3% at December 31, 2016
Debt Instrument [Line Items]
Maximum borrowing capacity				$ 350,000,000
Unsecured Revolving Credit Agreement Expiring 2020
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 200,000,000