Stock and Incentive Compensation Plans (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Compensation expense - Stock and Incentive plans [Abstract]
Compensation expense - Stock and Incentive plans	$ 1,191	$ 1,022
Performance Based Award [Member]
Shares [Roll Forward]
Outstanding/Nonvested shares or units, beginning of period (in shares)	160,520
Granted (in shares)	73,726
Granted - achievement shares (in shares)	0
Released from restriction (in shares)	(38,580)
Expired (in shares)	0
Forfeited (in shares)	(11,533)
Outstanding/Nonvested shares or units, end of period (in shares)	184,133
Compensation expense - Stock and Incentive plans [Abstract]
Compensation expense - Stock and Incentive plans	263	211
Time Vested Award [Member]
Shares [Roll Forward]
Outstanding/Nonvested shares or units, beginning of period (in shares)	291,634
Granted (in shares)	103,690
Granted - achievement shares (in shares)	0
Released from restriction (in shares)	(60,339)
Expired (in shares)	0
Forfeited (in shares)	(1,247)
Outstanding/Nonvested shares or units, end of period (in shares)	333,738
Compensation expense - Stock and Incentive plans [Abstract]
Compensation expense - Stock and Incentive plans	$ 928	$ 811
Restricted Stock [Member] | Performance awards includes achievement shares for grants after 2013 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Restricted Stock [Member] | Achievement shares from performance grants prior to 2013 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Restricted Stock [Member] | Time Vested Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
ROATE Performance measure (in hundredths)	100.00%
TSR Performance measure (in hundredths)	100.00%
Stock option-based awards [Member]
Options [Roll Forward]
Outstanding/Nonvested shares or units, beginning of period (in shares)	105,450
Granted (in shares)	0
Granted - achievement shares (in shares)	0
Exercised (in shares)	0
Expired (in shares)	(6,000)
Forfeited (in shares)	0
Outstanding/Nonvested shares or units, end of period (in shares)	99,450
2005 Stock and Incentive Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	5 years
Stock and incentive compensation plan, contractual term	7 years
1997 Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years
Stock and incentive compensation plan, contractual term	10 years