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Related party transactions (Details) (USD $) In Thousands, unless otherwise specified			3 Months Ended
	Dec. 31, 2013 Chesapeake	Dec. 31, 2013 Chesapeake Holdings Corporation	Mar. 31, 2013 Properties Operated by Chesapeake	Mar. 31, 2013 Properties Operated by Chaparral
Related Party Transaction [Line Items]
Chaparral common stock owned by Chesapeake		20.00%
Revenue from jointly owned properties			$ 1,380	$ (503)
Joint interest billings			(923)	4,267
Amounts receivable from Chesapeake	466
Amounts payable to Chesapeake	$ 64

Amount of receivables due from an entity that is affiliated with the reporting entity by means of direct or indirect ownership, due within 1 year (or 1 business cycle).

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- Definition

Amount of payable due to an entity that is affiliated with the reporting entity by means of direct or indirect ownership. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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