Scheduled Maturities of Debt, Including Scheduled Principal Amortization (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013
Balloon Payments
July 1 through December 31, 2013
2014	13,218
2015	15,077
2016	28,916
2017
2018	27,872
Thereafter	465,825
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid, Total	550,908
Scheduled Principal Amortization
July 1 through December 31, 2013	10,661
2014	21,929
2015	22,558
2016	22,991
2017	24,193
2018	24,189
Thereafter	148,795
Long-term Debt, Total	275,316
Total
July 1 through December 31, 2013	10,661
2014	35,147
2015	37,635
2016	51,907
2017	24,193
2018	52,061
Thereafter	614,620
Long-Term Debt, Repayments of Principal and Balloon Payments, Total	$ 826,224