Reconciliation of Shares Used in Calculating Basic and Diluted Earnings Per Share (Detail) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Basic weighted-average shares outstanding	86,576		105,394		88,236		109,221
Effect of common stock equivalents-stock options and non-vested stock under employee compensation plans			573	[1]	2,999	[1]	1,026	[1]
Diluted weighted-average shares outstanding	86,576	[1]	105,967	[1]	91,235	[1]	110,247	[1]
Weighted-average anti-dilutive common stock equivalents	7,602	[1]	4,487	[1]	4,461	[1]	5,023	[1]

[1] For periods in which losses are presented, dilutive earnings per share calculations do not differ from basic earnings per share because the effects of any potential common stock equivalents are anti-dilutive and therefore not included in the calculation of dilutive earnings per share. For the three months ended September 30, 2014, those potential shares totaled 2,741 which are included in the weighted average anti-dilutive common stock equivalents above in addition to 4,861 of out of the money anti-dilutive common stock equivalents for the three months ended September 30, 2014.