Benefit Plans (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Benefit Plans [Abstract]
Employer contribution (in hundredths)	50.00%
Maximum annual contribution per employee (in hundredths)	6.00%
Contributions made by employer	$ 813,000	$ 679,000	$ 577,000
Age considered for chief executive officer to be provided annual retirement benefit	70 years
Number of highest compensation year	3 years
Number of preceding years considered for average salary of chief executive officer	10 years
Retirement plan expense	$ 112,000	$ 125,000	$ 137,000