Consolidated Statement of Changes in Stockholders' Equity (USD $) Share data in Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Statement of Stockholders' Equity [Abstract]
Warrant exercises					$ 11
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	2,103,000	3,000	2,103,000	3,000	8,000
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	(9,615,000)	(6,000)	(9,615,000)	(6,000)	80
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	(807,000)	2,000	(807,000)	2,000
Accumulated other comprehensive income					83,000
Treasury Stock, Value, Acquired, Cost Method			(48,505,000)	(92,000)
Stock Issued During Period, Shares, Employee Benefit Plan				111	165
Stock Issued During Period, Shares, Employee Stock Ownership Plan			1,832
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures			27,538,000	204,000	43,000
Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net			24,863,000	17,000	13,000
Net income/(loss)	$ 27,016,000	$ 41,394,000