GENERAL (Detail Textuals)	9 Months Ended
Sep. 30, 2012
General [Abstract]
Stock split, conversion ratio	3 For 2

This item represents the conversion ratio used in the calculation of a stock split.

No definition available.

Name:	res_StockSplitConversionRatio
Namespace Prefix:	res_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration