 | us-gaap:LongTermLineOfCredit | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified |
 | us-gaap:CommercialPaperNoncurrent | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified |
 | us-gaap:ConstructionLoanNoncurrent | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified |
 | us-gaap:SecuredLongTermDebt | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified |
 | us-gaap:SubordinatedLongTermDebt | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified |
 | us-gaap:UnsecuredLongTermDebt | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified |
 | us-gaap:ConvertibleDebtNoncurrent | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified |
 | us-gaap:ConvertibleSubordinatedDebtNoncurrent | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified |
 | us-gaap:LongTermTransitionBond | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified |
 | us-gaap:LongTermPollutionControlBond | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified |
 | us-gaap:JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrustNoncurrent | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified |
 | us-gaap:LongTermNotesAndLoans | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified |
 | us-gaap:SpecialAssessmentBondNoncurrent | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified |
 | us-gaap:LongtermFederalHomeLoanBankAdvancesNoncurrent | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified |
 | us-gaap:OtherLongTermDebtNoncurrent | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified |