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Fair Value Disclosures - Summary of Assets and Liabilities Related to Financial Instruments, Measured at Fair Value on a Recurring Basis (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Accounts receivable, net $ 9,771us-gaap_AccountsReceivableNet $ 8,649us-gaap_AccountsReceivableNet
Senior notes 887,502us-gaap_SeniorNotes  
Notes payable and other borrowings 274,677us-gaap_NotesAndLoansPayable 834,589us-gaap_NotesAndLoansPayable
Level 3 [Member] | Book Value [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Accounts receivable, net 20,118us-gaap_AccountsReceivableNet
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember
60,397us-gaap_AccountsReceivableNet
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember
Notes payable and other borrowings 274,677us-gaap_NotesAndLoansPayable
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember
 
Level 3 [Member] | Fair Value [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Accounts receivable, net 20,118us-gaap_AccountsReceivableNet
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember
60,390us-gaap_AccountsReceivableNet
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember
Notes payable and other borrowings 274,677us-gaap_NotesAndLoansPayable
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember
 
Level 2 [Member] | Book Value [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Senior notes 887,502us-gaap_SeniorNotes
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember
 
Level 2 [Member] | Fair Value [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Senior notes $ 896,625us-gaap_SeniorNotes
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember