Stock Options and Stock Appreciation Rights Granted and Exercised (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Equity [Abstract]
Granted	324,000	344,500	261,500
Weighted average grant date fair value of options granted during the period	$ 1.77	$ 1.65	$ 2.63
Total intrinsic value of options exercised	$ 12,465	$ 0	$ 0