Comprehensive Income Reclassification Out of Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Provision for Income Taxes	$ 10,174	$ 9,079	$ 9,661
Net Income (Loss) Available to Common Stockholders, Basic	(168)	(589)	(479)
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	110	540	865
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest	110	540	865
Provision for Income Taxes	(43)	(214)	(343)
Net Income (Loss) Available to Common Stockholders, Basic	67	326	522
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	87	(2)	20
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, before Tax	(474)	(1,513)	(1,677)
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest	(387)	(1,515)	(1,657)
Provision for Income Taxes	152	600	656
Net Income (Loss) Available to Common Stockholders, Basic	$ (235)	$ (915)	$ (1,001)