Market Risk Management - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013
Line of Credit Facility [Line Items]
Debt outstanding	$ 66,500,000
Hypothetical increase or decrease in the highest applicable interest rate	10.00%
Effect on pretax earnings from continuing operations of hypothetical change in highest applicable interest rate	127,000
Forward contracts maturities	1 month
Fair value of forwards contracts	91,000
Senior Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Debt outstanding	16,500,000
Interest rates	3.25%
ABS Facility [Member]
Line of Credit Facility [Line Items]
Debt outstanding	$ 50,000,000
Interest rates	1.07%