Significant Accounting Policies (Tables 3) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2011	Jun. 30, 2010
Total fair value as of period end
Notes (Tables) Line Items
Oil and gas properties	$ 9,215	$ 8,460
Other properties		2,415
Total as of period end	9,215	10,875
Quoted prices in active markets for identical assets or liabilities (Level 1)
Notes (Tables) Line Items
Oil and gas properties	0	0
Other properties		0
Significant other observable inputs (Level 2)
Notes (Tables) Line Items
Oil and gas properties	0	0
Other properties		0
Significant unobservable inputs (Level 3)
Notes (Tables) Line Items
Oil and gas properties	9,215	8,460
Other properties		2,415
Year-to-date impairment losses
Notes (Tables) Line Items
Oil and gas properties	12,534	8,859
Other properties		1,068
Total as of period end	$ 12,534	$ 9,927