Supplemental Cash Flow Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Supplemental Cash Flow Elements [Abstract]
Interest paid	$ 1,304	$ 434	$ 3
Income taxes paid (refunded) - net	916	(1,130)	(542)
Non-cash investing and financing activities:
Non-controlling interests recognized in connection with acquisitions	2,896	82	500
Issuance of common stock for acquisition of Sun Well	$ 0	$ 60,825	$ 0