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Basis of Presentation (Narrative) (Detail)
Sep. 30, 2014
Dec. 31, 2013
Percentage of ownership 100.00%us-gaap_EquityMethodInvestmentOwnershipPercentage  
Minimum [Member]    
Percentage of ownership 20.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		 20.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Maximum [Member]    
Percentage of ownership 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_RangeAxis
= us-gaap_MaximumMember