Capitalized Software (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Capitalized Software
Capitalized software costs	$ 79,966,000	$ 88,912,000
Less: accumulated amortization	41,633,000	51,020,000
Total	38,333,000	37,892,000
Capitalized software development costs	26,331,000	22,579,000	24,635,000
Reduction in capitalized software costs and related accumulated amortization for fully amortized costs that are no longer in use	34,800,000
Capitalized software costs not subject to amortization	600,000	200,000
Amortization of capitalized software costs	$ 25,800,000	$ 28,500,000	$ 32,100,000