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Pension And Profit-Sharing Plans (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Contribution Plan Disclosure [Line Items]
Expenses related to retirement programs	$ 8.9us-gaap_PensionExpense	$ 8.0us-gaap_PensionExpense	$ 7.1us-gaap_PensionExpense
Four Zero One K Plan [Member]
Defined Contribution Plan Disclosure [Line Items]
Percentage of employee pay employer matches	4.25%
Minimum working hours per employee required to be eligible for discretionary contribution	1000 hours
First Three Percent Of Employee Pay [Member]
Defined Contribution Plan Disclosure [Line Items]
Percentage of employee pay employer matches	3.00%
Percentage of employee contribution employer matches	100.00%
More Than Three Percent Up To Five Percent Of Employee Pay [Member]
Defined Contribution Plan Disclosure [Line Items]
Percentage of employee pay employer matches	5.00%
Percentage of employee contribution employer matches	25.00%

The amount of pension benefit costs recognized during the period for (1) defined benefit plans and (2) defined contribution plans. For defined benefit plans, pension expense includes the following components: service cost, interest cost, expected return on plan assets, gain (loss) on plan assets, prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments. For defined contribution plans, the pension expense generally equals the firm's contribution to employees' accounts (if the firm contributes) during the period.

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