Scheduled Principal Repayments and Term-loan Maturities (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Scheduled principal payment	$ 57,258
Term-Loan maturities	220,484
Total	277,742	334,438
2014
Debt Instrument [Line Items]
Scheduled principal payment	2,870
Term-Loan maturities	1,007
Total payments	3,877
2015
Debt Instrument [Line Items]
Scheduled principal payment	2,930
Term-Loan maturities	8,681
Total payments	11,611
2016
Debt Instrument [Line Items]
Scheduled principal payment	2,653
Term-Loan maturities	99,565
Total payments	102,218
2017
Debt Instrument [Line Items]
Scheduled principal payment	1,843
Term-Loan maturities	70,885
Total payments	72,728
2018
Debt Instrument [Line Items]
Scheduled principal payment	1,404
Term-Loan maturities	29,669
Total payments	31,073
Thereafter
Debt Instrument [Line Items]
Scheduled principal payment	45,558
Term-Loan maturities	10,677
Total payments	$ 56,235