Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Federal statutory rate	35.00%
AMT credit carryforward balance	$ 36,300	$ 31,200
Net increase of unrecognized tax benefits	400
Unrecognized tax benefits	12,165	12,612	$ 10,784
Unrecognized tax benefits that would impact effective tax rate	10,900	11,100
Interest and penalty expense, excluding refunds	112	739	$ 1,119
Accrued interest and penalty	$ 2,915	$ 2,803