Subsequent Events (Details) shares in Millions, instrument in Millions, $ in Millions		1 Months Ended	12 Months Ended
	Feb. 22, 2017 USD ($)	Jan. 31, 2017 USD ($) shares	Dec. 31, 2016 USD ($) instrument	Dec. 31, 2015 USD ($)
Subsequent Event [Line Items]
Convertible senior notes			$ 240.0	$ 0.0
4 1/16% Convertible Subordinated Debentures [Member]
Subsequent Event [Line Items]
Convertible debentures into shares of common stock (in shares) | instrument			3.9
4 1/16% Convertible Subordinated Debentures [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Convertible senior notes		$ 35.6
Convertible debentures into shares of common stock (in shares) | shares		3.9
Coleman Aerospace [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Cash paid in acquisition	$ 15.0