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Derivative Instruments - Additional Information (Details) $ in Thousands	Jun. 30, 2019 USD ($)	Mar. 12, 2019 contract	Dec. 31, 2018 USD ($) contract
Derivative [Line Items]
Lines of credit outstanding	$ 50,474		$ 53,514
Interest rate swaps
Derivative [Line Items]
Number of interest rate swap contracts entered into | contract		3	4
Borrowings under derivative agreements	1,500,000		$ 1,000,000
Interest rate swaps | Minimum
Derivative [Line Items]
Fixed rate variable interest			1.108%
Interest rate swaps | Maximum
Derivative [Line Items]
Fixed rate variable interest			2.212%
2016 Credit Agreement
Derivative [Line Items]
Lines of credit outstanding	$ 2,400,000

X

- Definition

Amount of hedged item in hedging relationship. Excludes hedged asset or liability.

+ References

No definition available.

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X

- Definition

The percentage points added to the reference rate to compute the variable rate on the interest rate derivative.

+ References

No definition available.

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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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X

- Definition

The number of derivative instruments of a particular group held by the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
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-SubTopic 10
-Section 50
-Paragraph 1B
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X

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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