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Lawsuits and complaints (Details Textual) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 USD ($)
Disclosure of lawsuits and complaints [Line Items] |
Term at which Department of Justice agreed not to prosecute those charges against Company | 3 years
External monitor, term | 24 years
Aforementioned Amounts | $ 30,500
Department of Justice [Member] |
Disclosure of lawsuits and complaints [Line Items] |
Legal proceedings, amount agreed to pay | 15,487,500
Securities Exchange Commission [Member] |
Disclosure of lawsuits and complaints [Line Items] |
Legal proceedings, amount agreed to pay | $ 15

X
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