Equity Incentive Plans (Compensation Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Recognized compensation expenses
Stock Option Plan Expense	$ 727	$ 1,161	$ 1,307
Restricted Stock Expense	$ 10,982	$ 7,748	$ 6,582