Contingencies (Details)			6 Months Ended
	Mar. 15, 2017	Jun. 30, 2015 allegation	Jul. 31, 2017 defendant	May 05, 2014 claim
False and Misleading Statements and Failure to Disclosure Adverse Information [Member]
Loss Contingencies [Line Items]
Number of pending actions | claim				3
Number of allegations dismissed in claim		78
Number of allegations in claim		91
Richard A. Dohn v. Wright, et al. [Member]
Loss Contingencies [Line Items]
Extension of stay	60 days
Executive Officer [Member] | False and Misleading Statements and Failure to Disclosure Adverse Information [Member]
Loss Contingencies [Line Items]
Number of defendants | defendant			2