Fair Value Measurement - Fair Value of Assets (Liabilities) Not Measured at Fair Value In Consolidated Balance Sheets (Details) - USD ($) $ in Thousands		Sep. 30, 2015	Dec. 31, 2014
Level 2 | Long-term Debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long term debt, fair value	[1]	$ (398,286)	$ (429,049)
Level 3 | Debt Securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	[2]	$ 22,334	$ 21,311

[1] The fair value of fixed-rate long-term debt is estimated using the present value of underlying cash flows discounted at a current market yield for similar instruments. The carrying value of fixed-rate long-term debt was $375.0 million and $400.0 million at September 30, 2015 and December 31, 2014, respectively.

[2] The Perfect Home notes were initially measured at cost. The Company periodically reviews the carrying amount utilizing company-specific transactions or changes in Perfect Home’s financial performance to determine if fair value adjustments are necessary.