Income Taxes - Reconciliation of Beginning and Ending Balance of Total Unrecognized Tax Benefits (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended		12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2011
Reconciliation of beginning and ending balance of total unrecognized tax benefits
Beginning balance	$ 519	$ 374	$ 1,725	$ 710	$ 374
Gross increases - tax positions in prior year	0	0	333	827	0
Gross decreases - tax positions in prior period	0	0	(14)	(65)	0
Gross increases - tax positions in current period	191	73	2,784	264	145
Lapse of statue of limitations	0	0	(18)	(11)	0
Ending balance	$ 710	$ 447	$ 4,810	$ 1,725	$ 519