Public Offering (Detail Textuals) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended
	Jun. 30, 2014
Stockholders Equity Note [Line Items]
Common stock shares sold during the period	3,450,000
Underwriters' option
Stockholders Equity Note [Line Items]
Common stock shares sold during the period	450,000
Public offering price per share (in dollars per share)	38.82
Net proceeds from the offering after payment of underwriting discounts and expenses of the offering	128.7