Consolidated Statements of Cash Flows (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Common stock received from Healthfield escrow, shares			14,334
Deferred tax (expense) benefit associated with stock compensation deductions	$ (1.5)	$ (0.2)	$ 0.3
Common Stock [Member]
Issuance of stock in connection with Harden acquisition, shares	4,812,414