Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Notes (Details)

v2.4.0.8
Fair Value Measurements - Notes (Details) (Notes [Member], USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Estimate of Fair Value Measurement [Member]
 
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
2033 Senior Notes $ 116,993
Level 1 [Member]
 
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
2033 Senior Notes   
Level 2 [Member]
 
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
2033 Senior Notes   
Level 3 [Member]
 
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
2033 Senior Notes 116,993
Carrying Value [Member]
 
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
2033 Senior Notes $ 110,825