Pension Plan - Narrative (Details) (Supplemental Employee Retirement Plans, Defined Benefit [Member], USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Settlement loss, net	$ (2,162,000)
Actuarial gain (loss)	85,000
OCI reclassification, net gain (loss) recognized in net periodic benefit cost	(2,300,000)
General and Administrative Expense [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension expense		$ 2,800,000

Amount after tax of reclassification adjustment from accumulated other comprehensive income (loss) for actuarial gain (loss) related to pension and other postretirement benefit plans.

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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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