Share Based Compensation - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended				9 Months Ended	12 Months Ended			3 Months Ended	12 Months Ended	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 2005 Omnibus Stock Plan	Dec. 31, 2013 Stock Options and Restricted Stock Units	Dec. 31, 2013 Stock Options and Restricted Stock Units	Dec. 31, 2012 Stock Options and Restricted Stock Units	Dec. 31, 2011 Stock Options and Restricted Stock Units	Mar. 31, 2013 Stock Option	Dec. 31, 2013 Stock Option	Mar. 31, 2013 Restricted Stock	Dec. 31, 2013 Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorizes				1,800,000
Common stock, shares available for issuance				1,050,038
Exercise period, maximum	5 years 4 months 2 days	5 years 4 months 6 days	5 years 8 months 12 days	10 years
Minimum grant price percentage				100.00%
Recognized Compensation expense						$ 1.5	$ 1.6	$ 1.3
Unrecognized Compensation expense										0.2		3.2
Expected cost recognition weighted average period										1 year 4 months 24 days
Fair value of shares vested	$ 0.2	$ 0.2	$ 0.3
Stock granted	20,229				0				20,229		93,770
Vesting period										2 years 10 months 24 days