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OPERATING SEGMENT (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 4 Months Ended 12 Months Ended 5 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2012
Dec. 31, 2014
segment
Dec. 31, 2013
Aug. 30, 2012
OPERATING SEGMENT            
Number of reportable segments       1us-gaap_NumberOfReportableSegments    
OPERATING SEGMENT            
Revenues $ 653,124us-gaap_Revenues $ 622,758us-gaap_Revenues $ 811,492us-gaap_Revenues $ 2,695,390us-gaap_Revenues $ 2,749,428us-gaap_Revenues  
Total long-term assets       4,256,109us-gaap_NoncurrentAssets 4,205,344us-gaap_NoncurrentAssets  
Predecessor            
OPERATING SEGMENT            
Revenues           1,206,072us-gaap_Revenues
/ us-gaap_StatementScenarioAxis
= us-gaap_PredecessorMember
U.S.            
OPERATING SEGMENT            
Revenues     808,378us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= country_US
2,688,230us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= country_US
2,741,717us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= country_US
 
Total long-term assets       4,255,866us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_US
4,204,490us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_US
 
U.S. | Predecessor            
OPERATING SEGMENT            
Revenues           1,202,179us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= country_US
/ us-gaap_StatementScenarioAxis
= us-gaap_PredecessorMember
Canada            
OPERATING SEGMENT            
Revenues     3,114us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= country_CA
7,160us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= country_CA
7,711us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Total long-term assets       243us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_CA
854us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Canada | Predecessor            
OPERATING SEGMENT            
Revenues           $ 3,893us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= country_CA
/ us-gaap_StatementScenarioAxis
= us-gaap_PredecessorMember