Stockholders' Equity and Earnings per Common Share, OCI by Component, Anti-Dilutive Securities (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period			$ (5,893)	$ (10,802)
Net change for quarter	$ (832)	$ 2,065	(600)	3,743
Balance at end of period	(6,493)	(7,059)	(6,493)	(7,059)
Unrealized Gains (Losses) on Securities [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period			(78)	(5,317)
Net change for quarter			(911)	3,484
Balance at end of period	(989)	(1,833)	(989)	(1,833)
Unrealized Losses on Securities Transferred to Held to Maturity [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period			(3,386)	(3,937)
Net change for quarter			311	259
Balance at end of period	(3,075)	(3,678)	(3,075)	(3,678)
Defined Benefit Pension Plans [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period			(2,429)	(1,548)
Net change for quarter			0	0
Balance at end of period	$ (2,429)	$ (1,548)	$ (2,429)	$ (1,548)
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)	76	150	77	151