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Debt (Details) - USD ($) | 9 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2016 | Nov. 01, 2016 | Oct. 31, 2016 | May 03, 2016 | May 02, 2016 | Dec. 31, 2015
Revolving Credit Agreement (Textual) [Abstract] |  |  |  |  |  |
Senior unsecured notes | $ 392,153,000 |  |  |  |  | $ 391,254,000
Borrowings under Credit Agreement | $ 65,000,000 |  |  |  |  | $ 0
Repay deficit in agreement period | 6 months |  |  |  |  |
Ownership percentage by parent | 100.00% |  |  |  |  |
Senior Notes | Senior Notes Due 2023 |  |  |  |  |  |
Revolving Credit Agreement (Textual) [Abstract] |  |  |  |  |  |
Senior unsecured notes | $ 400,000,000 |  |  |  |  |
Interest rate | 6.875% |  |  |  |  |
Subsequent Event | Senior Notes | Senior Notes Due 2023 |  |  |  |  |  |
Revolving Credit Agreement (Textual) [Abstract] |  |  |  |  |  |
Senior unsecured notes |  | $ 400,000,000 |  |  |  |
Revolving Credit Facility [Member] |  |  |  |  |  |
Revolving Credit Agreement (Textual) [Abstract] |  |  |  |  |  |
Borrowings under Credit Agreement | $ 65,000,000 |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | 300,000,000 |  |  | $ 300,000,000 | $ 375,000,000 |
Revolving Credit Facility [Member] | Subsequent Event |  |  |  |  |  |
Revolving Credit Agreement (Textual) [Abstract] |  |  |  |  |  |
Borrowings under Credit Agreement |  | 95,000,000 |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  | $ 400,000,000 |  |  |
Letter of Credit [Member] |  |  |  |  |  |
Revolving Credit Agreement (Textual) [Abstract] |  |  |  |  |  |
Outstanding letters of credit | $ 800,000 |  |  |  |  |
Letter of Credit [Member] | Subsequent Event |  |  |  |  |  |
Revolving Credit Agreement (Textual) [Abstract] |  |  |  |  |  |
Outstanding letters of credit |  | $ 800,000 |  |  |  |

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- 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=64930739&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=64930785&loc=d3e28551-108399 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + 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 + Details
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- 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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- 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 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The carrying value as of the balance sheet date of the noncurrent portion 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 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 FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=28361426&loc=d3e1314-112600 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=28361426&loc=d3e1336-112600 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Line-of-Credit Arrangement -URI http://asc.fasb.org/extlink&oid=6517033 + Details
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