Employee Benefit Plans (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Employee Benefit Plans (Textual) [Abstract]
Period of Employment Required to be Eligible for Plan	3
Minimum age required to be considered eligible for plan	21
Minimum number of quarters required to be eligible for employer discretionary contribution	1
Minimum number of hours required to be considered eligible for employer discretionary contribution	501
Percent rate for non-elective safe harbor contribution as component of profit sharing plan	3.00%
Maximum percentage of annual compensation allowable for contribution by eligible employees	60.00%
Percentage of amount out of first specific percent of employee's contribution matched under plan	50.00%
Percentage of employee's contribution required to determine the matched amount under the plan	6.00%
Percentage of salary for deferral of cash payments	50.00%
Percentage of bonuses and directors fees for deferral of cash payments	100.00%
Liability related to obligations of deferred compensation plans	$ 1,255,000	$ 1,288,000
Number of officers in employment contract	15
Other Pension Plans, Defined Benefit [Member]
Employee Benefit Plans (Additional Textual) [Abstract]
Profit Sharing Plan Expense	3,974,000	2,043,000	2,223,000
Company's contribution to the plan	1,751,000	1,644,000	1,570,000
Supplemental Employee Retirement Plans (SERP) [Member]
Employee Benefit Plans (Additional Textual) [Abstract]
Company's contribution to the plan	47,000	21,000	10,000
Credit earning rate as a percentage of return on equity	50.00%
Total earnings for the plan	37,000	9,000	22,000
Deferred Compansation Plan [Member]
Employee Benefit Plans (Additional Textual) [Abstract]
Total amount deferred	278,000	362,000	358,000
Credit earning rate as a percentage of return on equity	50.00%
Total earnings for the plan	$ 231,000	$ 54,000	$ 116,000