Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating Loss Carryforwards [Line Items]
Excess tax benefit obtained by company	$ 1.3	$ 1.0	$ 1.0
Company's federal net operating losses for tax return purposes	12.3
State and foreign tax credit carry forwards, expiration year	2022
Likelihood percentage of being realized upon ultimate settlement with the relevant tax authority	50.00%
Unrecognized tax benefits	0	0
Changes in unrecognized benefits	0	0	0
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
State and foreign tax credit carry forwards, expiration description	Begin to expire in 2022
State and foreign tax credit carry forwards	$ 2.6