Shareholders' Equity And Earnings Per Share (Components Of Other Comprehensive Income (Loss)) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Activity Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	$ 7,711	$ (2,878)
Accumulated Unrealized Gains (Losses) on Securities, Other comprehensive income during the period, net of tax, before reclassifications	(4,649)	(1,943)
Total Accumulated Other Comprehensive Income (Loss), Other comprehensive income during the period, net of tax, before reclassifications	(9,554)	(2,307)
Accumulated Unrealized Gains (Losses) on Securities, Amount reclassified from accumulated other comprehensive income, net of tax	(151)	(489)
Total Accumulated Other Comprehensive Income (Loss), Amount reclassified from accumulated other comprehensive income, net of tax	776	355
Net Unrealized Gains on Securities	(4,800)	(2,432)
Net unrealized gains on derivative instruments	888	480
Net foreign currency translation adjustment	(4,866)	0
Total other comprehensive loss	(8,778)	(1,952)
Balance at end of period	(1,067)	(4,830)
Accumulated Unrealized Gains (Losses) on Securities [Member]
Activity Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	6,710	4,204
Accumulated Unrealized Gains (Losses) on Securities, Other comprehensive income during the period, net of tax, before reclassifications	(4,649)	(1,943)
Accumulated Unrealized Gains (Losses) on Securities, Amount reclassified from accumulated other comprehensive income, net of tax	(151)	(489)
Net Unrealized Gains on Securities	(4,800)	(2,432)
Balance at end of period	1,910	1,772
Accumulated Unrealized Gains (Losses) from Derivative Instruments [Member]
Activity Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	(5,292)	(7,082)
Accumulated Unrealized Gains (Losses) on Derivative Instruments, Other comprehensive income during the period, net of tax, before reclassifications	(39)	(364)
Accumulated Unrealized Gains (Losses) on Derivative Instruments, Amount reclassified from accumulated other comprehensive income, net of tax	927	844
Net unrealized gains on derivative instruments	888	480
Balance at end of period	(4,404)	(6,602)
Accumulated Foreign Currency Translation Adjustments [Member]
Activity Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	6,293	0
Accumulated Foreign Currency Translation Adjustments, Other comprehensive income during the period, net of tax, before reclassifications	(4,866)	0
Accumulated Foreign Currency Translation Adjustments, Amount reclassified from accumulated other comprehensive income, net of tax	0	0
Net foreign currency translation adjustment	(4,866)	0
Balance at end of period	$ 1,427	$ 0