Shareholders' Equity And Earnings Per Share (Components Of Other Comprehensive Income (Loss)) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	$ (37,332)	$ (63,036)
Other comprehensive income (loss) during the period, net of tax, before reclassifications	6,307	5,966
Amount reclassified from accumulated other comprehensive income (loss), net of tax	(66)	317
Other comprehensive income, net of tax	6,241	6,283
Balance at end of period	(31,091)	(56,753)
Accumulated Unrealized (Losses) Gains on Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(9,533)	(53,665)
Other comprehensive income (loss) during the period, net of tax, before reclassifications	15,945	13,722
Amount reclassified from accumulated other comprehensive income (loss), net of tax	(318)	20
Other comprehensive income, net of tax	15,627	13,742
Balance at end of period	6,094	(39,923)
Accumulated Unrealized Losses on Derivative Instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(2,517)	(2,462)
Other comprehensive income (loss) during the period, net of tax, before reclassifications	(593)	(356)
Amount reclassified from accumulated other comprehensive income (loss), net of tax	252	297
Other comprehensive income, net of tax	(341)	(59)
Balance at end of period	(2,858)	(2,521)
Accumulated Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(25,282)	(6,909)
Other comprehensive income (loss) during the period, net of tax, before reclassifications	(9,045)	(7,400)
Amount reclassified from accumulated other comprehensive income (loss), net of tax	0	0
Other comprehensive income, net of tax	(9,045)	(7,400)
Balance at end of period	$ (34,327)	$ (14,309)