Shareholders' Equity (Details) - Jun. 30, 2015	Right $ / shares shares
Shareholder Rights Agreement [Abstract]
Shareholder rights accompanying each outstanding share of the company's common stock (in number of Rights) | Right	1
Distribution date, description	The earlier of ten days after a public announcement that a person has become an Acquiring Person, or ten business days after a person announces or begins a tender offer in which consummation of such offer would result in a person becoming an Acquiring Person
Common stock, beneficial ownership threshold to be considered an Acquiring Person (in hundredths)	5.00%
Common shares purchasable per Right (in shares) | shares	0.10
Purchase price (in dollars per share)	$ 45.00
Purchase price (in dollars per one-tenth share)	$ 4.50
Redemption price (in dollars per Right)	0.001