Annual report pursuant to Section 13 and 15(d)

Stock Compensation Plans (A Summary Of The Status Of 1999 Plan) (Detail)

Stock Compensation Plans (A Summary Of The Status Of 1999 Plan) (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2014
Shares
Options outstanding, beginning balance	4,425,000	4,475,000
Exercised	(10,000)	(50,000)
Options outstanding, ending balance	4,415,000	4,425,000	4,475,000
Vested or expected to vest, December 31, 2014	4,415,000
Options exercisable, ending balance	4,415,000
Weighted- Average Exercise Price
Options outstanding, beginning balance	$ 1.63	$ 1.63
Exercised	$ 1.05	$ 1.05
Options outstanding, ending balance	$ 1.63	$ 1.63	$ 1.63
Vested or expected to vest, December 31, 2014	$ 1.63
Options exercisable, ending balance	$ 1.63
Weighted- Average Remaining Contractual Term (Years)
Options outstanding	2 years 4 months 24 days	3 years 4 months 24 days	4 years 4 months 24 days
Vested or expected to vest, December 31, 2014	2 years 4 months 24 days
Options exercisable, ending balance	2 years 4 months 24 days
Aggregate Intrinsic Value
Options outstanding	$ 6,624	$ 516
Vested or expected to vest, December 31, 2014	10,224
Options exercisable, ending balance	10,224
Plan 1999 [Member]
Shares
Options outstanding, beginning balance	16,932,401	17,302,468	17,765,468
Granted			500,000
Exercised	(1,141,200)	(285,067)	(881,500)
Forfeited		(30,000)	(35,000)
Expired	(5,200)	(55,000)	(46,500)
Options outstanding, ending balance	15,786,001	16,932,401	17,302,468	17,765,468
Vested or expected to vest, December 31, 2014	15,784,184
Options exercisable, ending balance	15,154,750
Weighted- Average Exercise Price
Options outstanding, beginning balance	$ 1.43	$ 1.43	$ 1.36
Granted			$ 2.80
Exercised	$ 1.10	$ 1.33	$ 0.88
Forfeited		$ 1.38	$ 1.90
Expired	$ 1.01	$ 0.34	$ 0.27
Options outstanding, ending balance	$ 1.46	$ 1.43	$ 1.43	$ 1.36
Vested or expected to vest, December 31, 2014	$ 1.46
Options exercisable, ending balance	$ 1.44
Weighted- Average Remaining Contractual Term (Years)
Options outstanding	3 years 7 months 6 days	4 years 4 months 24 days	5 years 4 months 6 days	6 years 0 months 11 days
Vested or expected to vest, December 31, 2014	3 years 7 months 6 days
Options exercisable, ending balance	3 years 6 months
Aggregate Intrinsic Value
Options outstanding	28,748	4,475	19,977		39,353
Vested or expected to vest, December 31, 2014	39,350
Options exercisable, ending balance	$ 38,048