Income Taxes Components of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income tax expense (benefit)	$ 181	$ (134)	$ 2,590
PHL [Member]
Current Federal Tax Expense (Benefit)	4	(27)	1,389
Deferred Federal Income Tax Expense (Benefit)	(89)	(353)	55
Current State and Local Tax Expense (Benefit)	9	93	287
Deferred State and Local Income Tax Expense (Benefit)	224	(171)	(72)
Income tax expense (benefit)	$ 148	$ (458)	$ 1,659