Strategic Investments and Fair Value of Financial Instruments (Details) (Albemarle and Bond Holdings [Member], USD $) In Thousands	6 Months Ended
Dec. 31, 2010	Dec. 31, 2009
Albemarle and Bond Holdings [Member]
Summary of financial information for Albemarle & Bond
Current assets	$ 121,519	$ 104,537
Non-current assets	56,755	53,128
Total assets	178,274	157,665
Current liabilities	25,801	21,128
Non-current liabilities	53,497	48,025
Shareholders' equity	98,976	88,512
Total liabilities and shareholders' equity	178,274	157,665
Turnover (gross revenues)	76,424	64,572
Gross profit	46,745	43,054
Profit for the year (net income)	$ 12,088	$ 12,752

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