Income Taxes (Schedule of Reconciliation of the Total Amount of Unrecognized Tax Benefit) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits, Beginning Balance	$ 629	$ 7,458	$ 9,234
Gross increases in tax positions in prior period	1,515	349	70
Reductions of tax positions in prior period		(3,469)	(1,833)
Lapse of statute of limitations		(3,575)
Settlements	(1,462)	(134)	(13)
Unrecognized Tax Benefits, Ending Balance	$ 682	$ 629	$ 7,458