Nature of Operations (Narrative) (Details) $ / shares in Units, $ in Millions	1 Months Ended
	May. 31, 2015 USD ($) $ / shares shares
Conversion of Stock [Line Items]
Sale of stock, Shares	1,725,000
Sale of stock price per share | $ / shares	$ 40.00
Net proceeds form sale of stock | $	$ 64.8
Over-Allotment [Member]
Conversion of Stock [Line Items]
Sale of stock, Shares	225,000