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Schedule of Future Principal Payments and Maturity (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Debt Instrument [Line Items]  
2014 $ 7,169
2015 9,704
2016 171,152
2017 22,046
2018 208,231
Thereafter 118,305
Future principal payments and maturity $ 536,607