Shareholders' Equity (Changes in Other Comprehensive (Income) Loss (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, beginning balance			$ (5,501)		$ (7,946)
Activity before reclassifications, net of tax			(3,957)		2,643
Reclassifications, net of tax			(440)		0
Activity, net of tax			(4,397)		2,643
Accumulated other comprehensive loss, ending balance	(9,898)	(5,303)	(9,898)		(5,303)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, beginning balance			(5,395)		(5,917)
Activity before reclassifications, net of tax			(118)		339
Reclassifications, net of tax			(440)	[1]	0
Activity, net of tax	(92)	388	(558)		339
Accumulated other comprehensive loss, ending balance	(5,953)	(5,578)	(5,953)		(5,578)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, beginning balance			(106)		(2,029)
Activity before reclassifications, net of tax			(3,839)		2,304
Reclassifications, net of tax			0		0
Activity, net of tax	2,936	2,176	(3,839)		2,304
Accumulated other comprehensive loss, ending balance	$ (3,945)	$ 275	$ (3,945)		$ 275

[1] Represents the reclassification adjustment for gains on securities sold, which was recognized as a component of other income. See Note 7 - Auction Rate Securities.