Annual report pursuant to Section 13 and 15(d)

Basis of Presentation - Common Share Amounts Used to Compute Basic and Diluted Earnings Per Share (Detail)

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Basis of Presentation - Common Share Amounts Used to Compute Basic and Diluted Earnings Per Share (Detail)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Earnings Per Share [Abstract]      
Weighted average shares used in basic computations 112,359 117,540 119,004
Dilutive effect of exercise of equity grants outstanding 5,457 7,046 7,059
Dilutive effect of warrants 40 260 432
Weighted average shares used in diluted computations 117,856 124,846 126,495