Employee Benefit Plans (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined contribution plan, contribution amount	$ 591,000	$ 537,000	$ 497,000
Profit sharing expense recognized in consolidated statements of income	5,065,000	5,213,000	5,270,000
Fixed Income [Member]
Target plan asset	50.00%
U.S. Equity [Member]
Target plan asset	34.00%
Non-U.S. Equity [Member]
Target plan asset	16.00%
Defined Benefit Plan [Member]
Accumulated benefit obligation	52,187,000	54,094,000
Pension contributions	2,000,000
Recognized prior service (cost) benefit	3,073,000
Net gains (losses) as a component of net periodic benefit cost	386,000
Supplemental Executive Retirement Plan [Member]
Accumulated benefit obligation	5,917,000	6,200,000
Contributions for plan	5,065,000	5,213,000	5,270,000
Recognized prior service (cost) benefit	136,000
Net gains (losses) as a component of net periodic benefit cost	$ 431,000