Income Taxes (Income Tax Expense (Benefit)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
Federal	$ 0	$ 0	$ 0
State	1,200	1,200	1,100
Total current income tax expense (benefit)	1,200	1,200	1,100
Deferred:
Federal	1,862	2,478	1,508
State	280	309	237
Total deferred income tax expense (benefit)	2,142	2,787	1,745
Income tax expense	$ 3,342	$ 3,987	$ 2,845