Shareholders' Equity and Earnings Per Common Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended	3 Months Ended
	Nov. 15, 2011	Mar. 31, 2015		Mar. 31, 2014		Jan. 21, 2015
Class of Stock [Line Items]
Stock repurchased		$ 902		$ 0
Shareholders with certain limited exceptions (in hundredths)	5.00%
Number of Series C Junior participating preferred stock purchase by each right	1/1000
Beneficial ownership level (in hundredths)	4.99%
Discount to current market price of the common stock (in hundredths)	50.00%
Earnings Per Share Reconciliation [Abstract]
Net income		3,781		3,138
Weighted average shares outstanding (in shares)		22,997,000	[1]	22,888,000	[1]
Restricted stock units (in shares)		309,000		304,000
Effect of stock options (in shares)		121,000		124,000
Stock units for deferred compensation plan for non-employee directors (in shares)		111,000		120,000
Weighted average shares outstanding for calculation of diluted earnings per share (in shares)		23,538,000		23,436,000
Net income per common share [Abstract]
Basic (in dollars per share)		$ 0.16	[1]	$ 0.14	[1]
Diluted (in dollars per share)		$ 0.16		$ 0.13
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares excluded from computation of diluted loss per share (in shares)		30,000		30,000
Common Stock [Member]
Class of Stock [Line Items]
Stock repurchase program percentage of shares authorized to be repurchased (in hundredths)						5.00%
Stock repurchased (in shares)		70,643
Stock repurchased		$ 900

[1] Basic net income per common share includes weighted average common shares outstanding during the period and participating share awards.