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

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

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-Topic 835
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-Section 45
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- Definition

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

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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.

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No definition available.

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- 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
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-SubTopic 470
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Percentage of principal amount of debt redeemed.

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- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Weighted average interest rate of debt outstanding.

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- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
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- Definition

Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition

Sum of the carrying values as of the balance sheet date of the portions of long-term notes payable due within one year or the operating cycle if longer.

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Debt Instruments - Long-Term Debt (Details) - USD ($)		9 Months Ended
Debt Instruments - Long-Term Debt (Details) - USD ($)	Sep. 21, 2018	Sep. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Notes Payable, Current		$ 7,838,000	$ 5,131,000
Senior Notes \| Senior Unsecured Notes Effective September 2018
Debt Instrument [Line Items]
Face amount	$ 350,000,000.0
Interest rate	8.875%
Outstanding principal, net of debt issuance costs		$ 342,500,000
Senior Notes \| Senior Unsecured Notes Effective September 2018 \| Debt Instrument, Redemption, Period One
Debt Instrument [Line Items]
Redemption price, percentage of principal amount redeemed	35.00%
Redemption price, percentage	108.875%
Senior Notes \| Senior Unsecured Notes Effective September 2018 \| Debt Instrument, Redemption, Period Two
Debt Instrument [Line Items]
Redemption price, percentage	101.00%
Notes Payable, Other Payables \| Promissory Note
Debt Instrument [Line Items]
Weighted average interest rate		5.90%
Notes payable		$ 34,800,000
Notes Payable, Current		$ 7,200,000
Notes Payable, Other Payables \| Promissory Note \| Minimum
Debt Instrument [Line Items]
Debt instrument, term		2 years
Notes Payable, Other Payables \| Promissory Note \| Maximum
Debt Instrument [Line Items]
Debt instrument, term		5 years