Business and Organization - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2014 Property
Property Subject to or Available for Operating Lease [Line Items]
Number of properties owned	9
UNITED STATES
Property Subject to or Available for Operating Lease [Line Items]
Number of properties owned	4
Germany | Assets Held-for-sale
Property Subject to or Available for Operating Lease [Line Items]
Number of properties owned	5