Fair value Of Financial Instruments (Schedule Of Fair Value Debt Instruments Based On Level 2) (Details) - USD ($)	Jun. 30, 2015	Apr. 30, 2015	Dec. 31, 2014
Senior Secured Term Credit Facility Maturities Through April 30, 2022 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Face amount	$ 610,000,000
Fair Value	600,850,000
Carrying Value	604,051,000
Senior Secured Term Credit Faclitiy Maturities Through October 15, 2016 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Face amount	90,000,000		$ 90,000,000
Fair Value			88,763,000
Carrying Value			88,704,000
11.00% Senior Secured Notes May 1, 2023 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Face amount	360,000,000	$ 360,000,000
Fair Value	356,400,000
Carrying Value	360,000,000
9 7/8% Senior Subordinated Notes Due April 15, 2017 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Face amount	380,100,000		380,100,000
Fair Value			349,646,000
Carrying Value			378,407,000
8 7/8% Senior Secured Second Lien Notes due January 15, 2017 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Face amount	350,000,000		350,000,000
Fair Value			353,500,000
Carrying Value			349,275,000
11 3/4% Senior Secured Due January 15, 2017 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Face amount	75,000,000		75,000,000
Fair Value	443,000		79,125,000
Carrying Value	$ 443,000		$ 75,000,000