Investment in Equity Investee - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule of Equity Method Investments [Line Items]
Equity interest in CONTADO acquisition			19.99%
Equity interest in CONTADO, excess cost of investment over underlying equity in net assets			$ 9,000,000
Earnings of equity method investment	935,000	564,000	833,000
Dividends Received from CONTADO	1,000,000	1,600,000	1,500,000
Equity Method Investments
Schedule of Equity Method Investments [Line Items]
Equity interest in CONTADO, amortization expense	$ 300,000	$ 400,000	$ 300,000