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Stock repurchase plan (Details)	Jun. 30, 2013	Apr. 22, 2009
Stock repurchase plan
Aggregate number of shares of common stock the Company may repurchase under the plan		3,016,000
Shares available to repurchase under the plan.	848,425

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- Definition

Aggregate number of shares of common stock the Company may repurchase under the plan

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- Definition

Shares available to repurchase under the plan.

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