Income Taxes (Provision For Income Taxes Charged To Operations) (Details) (USD $)	3 Months Ended	12 Months Ended
	Dec. 31, 2009	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Taxes [Abstract]
Current tax expense, U.S. federal		$ 24,538,000	$ 19,381,000	$ 14,605,000
Current tax expense, State		1,217,000	1,180,000	779,000
Current tax expense, Foreign		10,544,000	8,568,000	3,752,000
Current tax expense, Total current		36,299,000	29,129,000	19,136,000
Deferred tax expense (benefit), U.S. federal		(10,305,000)	(12,790,000)	1,545,000
Deferred tax expense (benefit), State		53,000	(234,000)	(39,000)
Deferred tax expense (benefit), Foreign		(1,347,000)	957,000	(1,646,000)
Deferred tax expense (benefit), Total deferred		(11,599,000)	(12,067,000)	(140,000)
Change in valuation allowance	18,400,000
Total provision		$ 24,700,000	$ 17,062,000	$ 18,996,000