Segment Reporting - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Dec. 31, 2013
Revenue, Major Customer [Line Items]
Total consolidated revenue from customer	$ 219,523,000	[1]	$ 189,106,000	[1]
American Express Corp.
Revenue, Major Customer [Line Items]
Concentration of sales by customer	10.00%
Total consolidated revenue from customer	46,900,000		51,900,000
Percent of total consolidated revenues from customer	21.40%		27.40%
Accounts receivable from customer	16,300,000				20,400,000
State Street Bank
Revenue, Major Customer [Line Items]
Concentration of sales by customer	10.00%
Total consolidated revenue from customer	31,600,000		31,400,000
Percent of total consolidated revenues from customer	14.40%		16.60%
Accounts receivable from customer	10,900,000				10,600,000
Federal Express Corp.
Revenue, Major Customer [Line Items]
Concentration of sales by customer	10.00%
Total consolidated revenue from customer	24,700,000		9,700,000
Percent of total consolidated revenues from customer	11.20%		5.10%
Accounts receivable from customer	$ 12,700,000				$ 12,300,000

[1] Net revenues are attributed to regions based upon customer location.