Fair Value Measurements (Details) $ in Thousands	Sep. 30, 2015 USD ($)
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets:
Deferred compensation plan asset	$ 1,990	[1]
Liabilities:
Deferred compensation plan liability	35,252	[2]
Significant Other Observable Inputs (Level 2) [Member]
Assets:
Deferred compensation plan asset	20,626	[1]
Fair Value Measurements (Textual) [Abstract]
Cost basis of the investment funds	24,041
Estimate of Fair Value Measurement [Member]
Assets:
Deferred compensation plan asset	22,616	[1]
Liabilities:
Deferred compensation plan liability	$ 35,252	[2]

[1] The deferred compensation plan asset consists of the investment funds maintained for the future payments under the Company’s executive deferred compensation plan, which is structured as a rabbi trust. The investments are marketable securities accounted for under the Debt and Equity Securities Topic of the ASC. The level 1 investments are valued using quoted market prices multiplied by the number of shares. The level 2 investments are valued based on vendor or broker models. The cost basis of the investment funds is $24,041.

[2] The deferred compensation plan liability is the Company’s liability under its executive deferred compensation plan. The liability represents the fair value of the participant shadow accounts, and the value is based on quoted market prices.