Annual report pursuant to Section 13 and 15(d)

Consolidated Statements of Stockholders' Equity (Parentheticals)

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Consolidated Statements of Stockholders' Equity (Parentheticals) - $ / shares
 1 Months Ended 3 Months Ended 12 Months Ended
Nov. 19, 2014
Nov. 30, 2014
Dec. 31, 2014
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2014
Cash dividends declared per share (in dollars per share)       $ 2.08 $ 18.5 $ 1.8
Special Cash Dividend            
Cash dividends declared per share (in dollars per share) $ 16.50 $ 16.50 $ 16.50