Comprehensive Income Reclassification Out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Provision for Income Taxes	$ 10,610	$ 10,174	$ 9,079
Net Income (Loss) Available to Common Stockholders, Basic	(402)	(168)	(589)
Accumulated Net Unrealized Investment Gain (Loss) [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax	129	110	540
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest	129	110	540
Provision for Income Taxes	(51)	(43)	(214)
Net Income (Loss) Available to Common Stockholders, Basic	78	67	326
Accumulated Defined Benefit Plans Adjustment [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), before Tax	56	87	(2)
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, before Tax	(846)	(474)	(1,513)
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest	(790)	(387)	(1,515)
Provision for Income Taxes	310	152	600
Net Income (Loss) Available to Common Stockholders, Basic	$ (480)	$ (235)	$ (915)