Income Taxes (Effective tax rate reconciliation) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Federal tax	$ 10,783	$ 22,282	$ 34,336
State income taxes, net of federal tax provision (benefit)	213	(366)	293
Foreign income taxed at lower tax rates	(15,515)	(6,356)	(5,050)
Subpart F income and foreign dividends, net of foreign tax credits	496	1,115	1,786
Valuation allowance - foreign tax credit carryforwards	3,135	(5,843)	(6,503)
Liability for unrecognized tax benefits	4,217	107	1,109
U.S. provision-to-return adjustments	(102)	(167)	(2,345)
Valuation allowance - net operating loss carryforwards	521	0	(5,820)
Other	1,077	(615)	33
Income tax provision (benefit), Total	$ 4,825	$ 10,157	$ 17,839
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Income tax rate, Federal tax	35.00%	35.00%	35.00%
Income tax rate, State income taxes	0.70%	(0.60%)	0.30%
Income tax rate, Foreign income taxed at lower tax rates	(50.40%)	(10.00%)	(5.20%)
Income tax rate, Subpart F income and foreign dividends	1.60%	1.80%	1.80%
Income tax rate, Valuation allowance - foreign tax credit carryforwards	10.20%	(9.20%)	(6.60%)
Income tax rate, Liability for unrecognized tax benefits	13.70%	0.20%	1.10%
Income tax rate, U.S. provision-to-return adjustment	(0.30%)	(0.30%)	(2.40%)
Income tax rate, Valuation allowance - net operating loss carryforwards	1.70%	0.00%	(5.90%)
Income tax rate, Other	3.50%	(1.00%)	0.10%
Income tax rate, Total	15.70%	15.90%	18.20%