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Long-Term Debt - Summary of Interest Received and Paid under Term of Cash Flow Swap (Details) | Mar. 31, 2018 USD ($)
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Derivatives, Fair Value [Line Items] |
One month LIBOR rate | 1.883%
Cash Flow Swap A |
Derivatives, Fair Value [Line Items] |
Notional Amount | $ 250,000,000
Pay Rate | 2.00%
Cash Flow Swap B |
Derivatives, Fair Value [Line Items] |
Notional Amount | $ 375,000,000
Pay Rate | 2.00%
Cash Flow Swap C |
Derivatives, Fair Value [Line Items] |
Notional Amount | $ 375,000,000
Pay Rate | 3.00%
Cash Flow Swap D |
Derivatives, Fair Value [Line Items] |
Notional Amount | $ 312,500,000
Pay Rate | 2.00%
Cash Flow Swap E |
Derivatives, Fair Value [Line Items] |
Notional Amount | $ 250,000,000
Pay Rate | 3.00%
Cash Flow Swap F |
Derivatives, Fair Value [Line Items] |
Notional Amount | $ 225,000,000
Pay Rate | 3.00%
Cash Flow Swap G |
Derivatives, Fair Value [Line Items] |
Notional Amount | $ 150,000,000
Pay Rate | 2.00%
Cash Flow Swap H |
Derivatives, Fair Value [Line Items] |
Notional Amount | $ 250,000,000
Pay Rate | 3.00%

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- Definition Nominal or face amount used to calculate payments on the derivative liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5579245-113959 + Details
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