Taxes - Unrecognized Tax Benefits (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Reconciliation Of Unrecognized Tax Benefits Excluding Amounts Pertaining To Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 5,871	$ 5,072
Additions for tax positions of prior years		799
Reductions for tax positions of prior years	(5,553)
Balance at end of year	$ 318	$ 5,871