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Tender Offer (Details) - USD ($)
$ / shares in Units, $ in Millions
Dec. 08, 2015
Dec. 14, 2015
Equity, Tender Offer [Line Items]    
Dutch auction tender offer amount for shares of common stock $ 35.0  
Dutch auction tender offer commence date Dec. 14, 2015  
Dutch auction tender offer expiration date Jan. 12, 2016  
Common stock shares acquired from fully subscribed Dutch auction tender offer   1,971,832
Price per share, common stock share acquired from fully subscribed Dutch auction tender offer   $ 17.75
Total tender offer cost   $ 35.3
Minimum [Member]    
Equity, Tender Offer [Line Items]    
Dutch auction tender offer share price of common stock $ 15.50  
Maximum [Member]    
Equity, Tender Offer [Line Items]    
Dutch auction tender offer share price of common stock $ 17.75