Shareholders' Equity (Components of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Activity Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	$ (37,332)	$ (63,036)	$ 7,711
Other comprehensive income (loss) during the period, net of tax, before reclassification	(26,523)	24,211	(75,635)
Amount reclassified from accumulated other comprehensive income (loss), net of tax	1,069	1,493	4,888
Amount reclassified from accumulated other comprehensive income related to amortization of unrealized losses on investment securities transferred to held-to-maturity from available-for-sale	78
Total other comprehensive (loss) income	(25,376)	25,704	(70,747)
Balance at end of period	(62,708)	(37,332)	(63,036)
Accumulated Unrealized Losses on Securities
Activity Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	(9,533)	(53,665)	6,710
Other comprehensive income (loss) during the period, net of tax, before reclassification	(8,023)	43,828	(62,182)
Amount reclassified from accumulated other comprehensive income (loss), net of tax	(196)	304	1,807
Amount reclassified from accumulated other comprehensive income related to amortization of unrealized losses on investment securities transferred to held-to-maturity from available-for-sale	78
Total other comprehensive (loss) income	(8,141)	44,132	(60,375)
Balance at end of period	(17,674)	(9,533)	(53,665)
Accumulated Unrealized Losses on Derivative Instruments
Activity Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	(2,517)	(2,462)	(5,292)
Other comprehensive income (loss) during the period, net of tax, before reclassification	(941)	(1,244)	(251)
Amount reclassified from accumulated other comprehensive income (loss), net of tax	1,265	1,189	3,081
Amount reclassified from accumulated other comprehensive income related to amortization of unrealized losses on investment securities transferred to held-to-maturity from available-for-sale	0
Total other comprehensive (loss) income	324	(55)	2,830
Balance at end of period	(2,193)	(2,517)	(2,462)
Accumulated Foreign Currency Translation Adjustments
Activity Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	(25,282)	(6,909)	6,293
Other comprehensive income (loss) during the period, net of tax, before reclassification	(17,559)	(18,373)	(13,202)
Amount reclassified from accumulated other comprehensive income (loss), net of tax	0	0	0
Amount reclassified from accumulated other comprehensive income related to amortization of unrealized losses on investment securities transferred to held-to-maturity from available-for-sale	0
Total other comprehensive (loss) income	(17,559)	(18,373)	(13,202)
Balance at end of period	$ (42,841)	$ (25,282)	$ (6,909)