Reconciliation of Basic to Diluted Weighted Average Common Shares Outstanding (Detail) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule Of Earnings Per Share Basic And Diluted By Common Class [Line Items]
Basic	41,105	40,859	40,501
Dilutive effect of share based awards	410		287
Dilutive effect of 3.875% Convertible Notes and warrants	2,178		13
Diluted	43,693	40,859	40,801