Summarized Aggregate Financial Information for Equity Investees (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Subsidiary, Sale of Stock [Line Items]
Revenues	$ 42,105	$ 66,145	$ 70,896
Net earnings	8,064	11,037	4,326
Total assets	25,470	52,500	57,972
Notes payable	12,390	23,681	23,533
Stockholders' equity	$ 5,561	$ 12,758	$ 12,524