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Related Party (Expense Charges and Allocations) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Related Party Transactions [Abstract]
Stock or Unit Option Plan Expense	$ 365,000	$ 477,000	$ 800,000	$ 1,300,000
Pension Expense	1,000,000	1,000,000	2,000,000	2,000,000
Defined Contribution Plan Employer Matching Contribution Percent			4.00%
Defined Contribution Plan, Cost Recognized	$ 249,000	$ 342,000	$ 517,000	$ 679,000

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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- Definition

The noncash expense that accounts for the value of stock or unit options distributed to employees as compensation.

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