Income Taxes Income Tax Disclosure (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	$ 0	$ 9,291	$ (126,458)
Effective Income Tax Rate, Continuing Operations	40.45%	27.17%	(266.33%)
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	$ 0	$ 0	$ 0
Income Tax Benefit Recognized due to IRC 45L for energy efficient homes	$ 400