Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Notes (Details)

v3.7.0.1
Fair Value Measurements - Notes (Details) - Notes
$ in Thousands
Mar. 31, 2017
USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
2033 Senior Notes $ 29,538
Level 3  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
2033 Senior Notes 29,538
Carrying Value  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
2033 Senior Notes $ 27,494