Stock-Based Compensation Plan (Details) (USD $)	3 Months Ended
	Mar. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation expense	$ 104,000
Stock Options [Member]
Shares [Roll Forward]
Outstanding at beginning of year (in shares)	82,171
Granted (in shares)	0
Exercised (in shares)	0
Forfeited (in shares)	0
Outstanding at end of period (in shares)	82,171
Weighted Average Exercise Price [Roll Forward]
Outstanding at beginning of year (in dollars per share)	$ 17.32
Granted (in dollars per share)	$ 0
Exercised (in dollars per share)	$ 0
Forfeited (in dollars per share)	$ 0
Outstanding at end of period (in dollars per share)	$ 17.32
Aggregate intrinsic value of options outstanding at end of period	171,000
Options vested and exercisable (in shares)	82,171
Non vested stock option (in shares)	0
Weighted average remaining contractual term for options	4 years 6 months
2006 Equity Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)	430,000
2006 Equity Compensation Plan [Member] | Stock Options [Member]
Weighted Average Exercise Price [Roll Forward]
Options vested and exercisable (in shares)	60,171
2006 Equity Compensation Plan [Member] | Restricted Stock [Member]
Shares [Roll Forward]
Outstanding at beginning of year (in shares)	120,455
Granted (in shares)	0
Vested (in shares)	(5,255)
Forfeited (in shares)	0
Non-vested at end of period (in shares)	115,200
Weighted Average Grant-Date Fair Value [Roll Forward]
Outstanding at beginning of year (in dollars per share)	$ 15.66
Granted (in dollars per share)	$ 0
Vested (in dollars per share)	$ (13.92)
Forfeited (in dollars per share)	$ 0
Non-vested at end of period (in dollars per share)	$ 16.00
Aggregate Intrinsic Value [Abstract]
Outstanding at end of period	2,236,000
Restricted stock nonvested outstanding, Weighted average remaining contractual terms	3 years 9 months 18 days
Unrecognized compensation expense related to nonvested restricted stock awards	$ 3,000,000
1997 Stock Incentive Plan [Member] | Stock Options [Member]
Weighted Average Exercise Price [Roll Forward]
Options vested and exercisable (in shares)	22,000