Annual report pursuant to Section 13 and 15(d)

Stock Compensation Plans (A Summary Of The Status Of 2009 Plan) (Detail)

Stock Compensation Plans (A Summary Of The Status Of 2009 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	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	$ 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 2009 [Member]
Shares
Options outstanding, beginning balance	18,145,564	15,937,715	12,503,994
Granted	3,641,212	2,788,212	3,725,000
Exercised	(1,174,376)	(272,955)
Forfeited	(233,201)	(307,408)	(291,279)
Options outstanding, ending balance	20,379,199	18,145,564	15,937,715	12,503,994
Vested or expected to vest	20,218,120
Options exercisable, ending balance	10,892,035
Weighted- Average Exercise Price
Options outstanding, beginning balance	$ 1.74	$ 1.78	$ 1.55
Granted	$ 3.29	$ 1.41	$ 2.57
Exercised	$ 1.56	$ 1.39
Forfeited	$ 1.64	$ 1.51	$ 1.73
Options outstanding, ending balance	$ 2.03	$ 1.74	$ 1.78	$ 1.55
Vested or expected to vest	$ 2.02
Options exercisable, ending balance	$ 1.69
Weighted- Average Remaining Contractual Term (Years)
Options outstanding	7 years 4 months 24 days	7 years 11 months 16 days	8 years 8 months 23 days	9 years 7 months 2 days
Vested or expected to vest, December 31, 2014	7 years 4 months 24 days
Options exercisable, ending balance	6 years 10 months 24 days
Aggregate Intrinsic Value
Options outstanding	25,285	790	11,651		39,303
Vested or expected to vest, December 31, 2014	39,030
Options exercisable, ending balance	$ 24,608