v3.8.0.1

Long-Term Debt - Schedule of Outstanding Senior Notes Issuances (Details) - USD ($)	Sep. 30, 2017	Jun. 27, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Unamortized debt issuance costs	$ 8,070,000		$ 11,091,000
Senior notes, net	254,430,000		351,409,000
Senior Notes [Member]
Debt Instrument [Line Items]
Principal	262,500,000		362,500,000
Unamortized debt issuance costs	8,070,000		11,091,000
Senior notes, net	254,430,000		351,409,000
Senior Notes [Member] | 2016 Senior Notes [Member]
Debt Instrument [Line Items]
Principal	110,000,000		110,000,000
Unamortized debt issuance costs	3,664,000		3,694,000
Senior notes, net	106,336,000		106,306,000
Original debt issuance costs	$ 3,715,000
Coupon rate	6.625%
Effective interest rate	7.07%
Senior Notes [Member] | 2013 Senior Notes [Member]
Debt Instrument [Line Items]
Principal	$ 152,500,000		152,500,000
Unamortized debt issuance costs	4,406,000		4,532,000
Senior notes, net	148,094,000		147,968,000
Original debt issuance costs	$ 5,054,000
Coupon rate	7.75%
Effective interest rate	8.04%
Senior Notes [Member] | 2012 Senior Notes [Member]
Debt Instrument [Line Items]
Principal	$ 0	$ 100,000,000	100,000,000
Unamortized debt issuance costs	0		2,865,000
Senior notes, net	0		$ 97,135,000
Original debt issuance costs	$ 3,406,000
Coupon rate	8.00%
Effective interest rate	8.31%

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

+ References

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-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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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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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.

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