Schedule of Share-based Compensation, Stock Options, Activity (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Shares [Abstract]
Outstanding at January 1	3,877	7,584	11,859
Exercised	(190)	(205)	(96)
Forfeited or expired	(3,141)	(3,502)	(4,179)
Outstanding at December 31	546	3,877	7,584
Exercisable at December 31	546	3,877	7,584
Weighted-Average Grant Price [Abstract]
Outstanding at January 1	$ 45.00	$ 53.88	$ 52.01
Exercised	$ 11.88	$ 10.32	$ 9.25
Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price	$ 51.23	$ 66.25	$ 49.61
Outstanding at December 31	$ 20.72	$ 45.00	$ 53.88
Exercisable at December 31	$ 20.72	$ 45.00	$ 53.88