Supplemental Cash Flow Information (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Supplemental disclosures of cash flows: [Abstract]
Interest paid	$ 539	$ 222
Income taxes paid	1,594	0
Non-cash investing and financing activities:
Issuance of common stock for acquisition of Sun Well	$ 0	$ 60,825