Discontinued Operations - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended
	May 31, 2012	Jun. 30, 2012	Mar. 31, 2012
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
Entire goodwill balance impaired			9.9
Wrote-off the remaining identifiable intangible assets			$ 0.4