Quarterly report pursuant to Section 13 or 15(d)

Disclosure Of Fair Value Of Financial Instruments (Details)

v3.2.0.727
Disclosure Of Fair Value Of Financial Instruments (Details) - USD ($)
Jun. 30, 2015
Dec. 31, 2014
Disclosure Of Fair Value Of Financial Instruments [Abstract]    
Fair value of Company's long-term debt $ 2,046,116,000 $ 2,133,214,000
Book value of Company's long-term debt $ 2,034,819,000 $ 2,088,654,000