Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Schedule of Instruments Not Carried at Fair Value (Details)

v2.4.1.9
Fair Value Measurements - Schedule of Instruments Not Carried at Fair Value (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Long term debt, including current portion:    
Carrying value $ 1,707,499us-gaap_LongTermDebt $ 1,649,708us-gaap_LongTermDebt
Fair value $ 1,698,876us-gaap_LongTermDebtFairValue [1] $ 1,605,255us-gaap_LongTermDebtFairValue [1]
[1] T he fair value is based on market quotations from third party financial institutions and is classified as Level 2 in the hierarchy.