Plan of Merger - Additional Information (Detail) (Subsequent Event [Member], USD $)	0 Months Ended
	Oct. 09, 2013
Subsequent Event [Member]
Merger Related Items [Line Items]
Agreement date of merger	Oct. 09, 2013
Share conversion ratio	0.7264
Cash paid for each share of common stock of Camco after merger	$ 6
Percentage of common stock consideration to be given as a result of merger	80.00%
Percentage of cash consideration to be given as a result of merger	20.00%