Commitments and Contingencies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Future funding commitments	$ 18,376,000
Ground lease commitments, 2015	22,018,000
Ground lease commitments, 2016	21,030,000
Ground lease commitments, 2017	20,390,000
Ground lease commitments, 2018	14,565,000
Ground lease commitments, 2019	12,673,000
Ground lease commitments, Thereafter	37,577,000
FLORIDA
Property, Plant and Equipment [Line Items]
Expiration date	Dec. 31, 2017
Ground lease, rent expense	2.00
Ground Lease [Member]
Property, Plant and Equipment [Line Items]
Ground lease commitments, 2015	1,463,000
Ground lease commitments, 2016	1,592,000
Ground lease commitments, 2017	1,656,000
Ground lease commitments, 2018	1,791,000
Ground lease commitments, 2019	1,844,000
Ground lease commitments, Thereafter	$ 105,783,000
Expiration date	Jun. 01, 2053