Discontinued Operations - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	0 Months Ended	3 Months Ended	12 Months Ended
	May 16, 2012	Jun. 30, 2012	Dec. 31, 2013
Discontinued Operations And Disposal Groups [Abstract]
Additional recognition of loss contingency	$ 4.0
Description of payment of earn-out of EBITDA from discontinued operation	Company will be paid an earn-out equal to 40% of Ascension's EBITDA, for the first five years commencing May 16, 2012.
Recognized loss contingency		4.0
Loss incurred to resolve legacy contractual claims			2.2
Additional loss incurred			$ 0.7