Summary of Activity Related to Uncertain Tax Positions (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Disclosure Summary Of Activity Related To Uncertain Tax Positions [Abstract]
Balance at January 1,	$ 1,258	$ 1,412	$ 1,315
Additions based on tax positions related to the current year	454	178	178
Additions for tax positions of prior years	423	83	22
Prior year reductions	(5)	(315)	(13)
Statute expirations	(85)	(83)	(90)
Settlements	(85)	(17)	0
Balance at December 31,	$ 1,960	$ 1,258	$ 1,412