Stockholders' Equity and Earnings per Common Share, OCI by Component, Anti-Dilutive Securities (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Unrealized Gains (Losses) on Securities [Abstract]
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	$ (1,739)	$ (576)
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	428	515
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	(1,311)	(61)
Defined Benefit Pension Plans [Abstract]
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	(2,469)	(2,586)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Reclassification Adjustments, Net of Tax	0	0
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	(2,469)	(2,586)
Accumulated Other Comprehensive Income (Loss) [Abstract]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(4,208)	(3,162)
Other Comprehensive Income (Loss), Net of Tax	428	515
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (3,780)	$ (2,647)
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	0	70