Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Federal statutory rate	35.00%
Net increase of unrecognized tax benefits	$ 4,900,000
Unrecognized tax benefits	10,784,000	5,926,000	4,567,000
Unrecognized tax benefits that would impact effective tax rate	8,400,000	3,500,000
Interest and penalty expense, excluding refunds	1,119,000	111,000	106,000
Accrued interest and penalty	$ 2,065,000	$ 945,000