Shareholders' Equity And Earnings Per Share (Components Of Other Comprehensive Income (Loss)) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Activity Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	$ (49,204)	$ 1,971	$ 7,711	$ (2,878)
Other comprehensive income (loss) during the period, net of tax, before reclassifications	1,927	7,200	(56,716)	11,494
Amount reclassified from accumulated other comprehensive income (loss), net of tax	863	634	2,591	1,189
Net other comprehensive income (loss) during the period, net of tax	2,790	7,834	(54,125)	12,683
Balance at end of period	(46,414)	9,805	(46,414)	9,805
Accumulated Unrealized Gains (Losses) on Securities
Activity Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	(41,213)	5,907	6,710	4,204
Other comprehensive income (loss) during the period, net of tax, before reclassifications	(1,460)	2,358	(49,231)	5,214
Amount reclassified from accumulated other comprehensive income (loss), net of tax	(45)	(247)	(197)	(1,400)
Net other comprehensive income (loss) during the period, net of tax	(1,505)	2,111	(49,428)	3,814
Balance at end of period	(42,718)	8,018	(42,718)	8,018
Accumulated Unrealized Losses on Derivative Instruments
Activity Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	(3,100)	(6,037)	(5,292)	(7,082)
Other comprehensive income (loss) during the period, net of tax, before reclassifications	(518)	(1,055)	(206)	(1,718)
Amount reclassified from accumulated other comprehensive income (loss), net of tax	908	881	2,788	2,589
Net other comprehensive income (loss) during the period, net of tax	390	(174)	2,582	871
Balance at end of period	(2,710)	(6,211)	(2,710)	(6,211)
Accumulated Foreign Currency Translation Adjustment
Activity Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	(4,891)	2,101	6,293	0
Other comprehensive income (loss) during the period, net of tax, before reclassifications	3,905	5,897	(7,279)	7,998
Amount reclassified from accumulated other comprehensive income (loss), net of tax	0	0	0	0
Net other comprehensive income (loss) during the period, net of tax	3,905	5,897	(7,279)	7,998
Balance at end of period	$ (986)	$ 7,998	$ (986)	$ 7,998