XML 59 R45.htm IDEA: XBRL DOCUMENT v2.4.1.9
Debt and Other Long Term Liabilities (Details 1) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Long Term Debt Maturities $ 3,378,000upl_LongTermDebtMaturities
Maturities Of Long Term Debt One Year [Member]  
Long Term Debt Maturities 100,000upl_LongTermDebtMaturities
/ upl_MaturitiesOfLongTermDebtAxis
= upl_MaturitiesOfLongTermDebtOneYearMember
Maturities Of Long Term Debt 2016 [Member]  
Long Term Debt Maturities 580,000upl_LongTermDebtMaturities
/ upl_MaturitiesOfLongTermDebtAxis
= upl_MaturitiesOfLongTermDebt2016Member
Maturities Of Long Term Debt 2017 [Member]  
Long Term Debt Maturities 116,000upl_LongTermDebtMaturities
/ upl_MaturitiesOfLongTermDebtAxis
= upl_MaturitiesOfLongTermDebt2017Member
Maturities Of Long Term Debt 2018 [Member]  
Long Term Debt Maturities 650,000upl_LongTermDebtMaturities
/ upl_MaturitiesOfLongTermDebtAxis
= upl_MaturitiesOfLongTermDebt2018Member
Maturities of Long Term Debt 2019 [Member]  
Long Term Debt Maturities 173,000upl_LongTermDebtMaturities
/ upl_MaturitiesOfLongTermDebtAxis
= upl_MaturitiesOfLongTermDebt2019Member
Maturities Of Long Term Debt Beyond Five Years [Member]  
Long Term Debt Maturities $ 1,759,000upl_LongTermDebtMaturities
/ upl_MaturitiesOfLongTermDebtAxis
= upl_MaturitiesOfLongTermDebtBeyondFiveYearsMember