Stock and Incentive Compensation Plans (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Compensation expense - Stock and Incentive plans [Abstract]
Compensation expense - Stock and Incentive plans	$ 1,044	$ 852	$ 2,235	$ 1,874
Performance Based Award [Member]
Shares [Roll Forward]
Outstanding/Nonvested shares or units, beginning of period (in shares)	184,133		160,520
Granted (in shares)	0		73,726
Exercised or released from restriction	0		(38,580)
Expired (in shares)	0
Forfeited (in shares)	0		(11,533)
Outstanding/Nonvested shares or units, end of period (in shares)	184,133		184,133
Compensation expense - Stock and Incentive plans [Abstract]
Compensation expense - Stock and Incentive plans	267	187	530	398
Time Vested Award [Member]
Shares [Roll Forward]
Outstanding/Nonvested shares or units, beginning of period (in shares)	333,738		291,634
Granted (in shares)	500		104,190
Exercised or released from restriction	(367)		(60,706)
Expired (in shares)	0
Forfeited (in shares)	(2,688)		(3,935)
Outstanding/Nonvested shares or units, end of period (in shares)	331,183		331,183
Compensation expense - Stock and Incentive plans [Abstract]
Compensation expense - Stock and Incentive plans	$ 777	$ 665	$ 1,705	$ 1,476
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)	99,450		105,450
Granted (in shares)	0		0
Exercised (in shares)	0		0
Expired (in shares)	(99,450)		(105,450)
Forfeited (in shares)	0		0
Outstanding/Nonvested shares or units, end of period (in shares)	0		0
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