Aggregate Consolidated Scheduled Debt Repayment (Detail) $ in Thousands	Dec. 31, 2016 USD ($)
Debt Disclosure [Abstract]
2017	$ 61,115
2018	23,043
2019	205,251	[1]
2020	1,292
2021	1,356
Later	23,605
Total	$ 315,662

[1] Includes repayment of $201.5 million of outstanding borrowings under the terms of our $250 million revolving credit agreement.