Fair Value Measurements (Details) - Fair Value, Measurements, Recurring [Member] $ in Thousands	Sep. 30, 2016 USD ($)
Fair Value Measurements (Textual) [Abstract]
Cost basis of the investment funds	$ 25,792
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets:
Deferred compensation plan asset	3,413	[1]
Liabilities:
Deferred compensation plan liability	36,928	[2]
Total liabilities	36,928
Significant Other Observable Inputs (Level 2) [Member]
Assets:
Deferred compensation plan asset	23,114	[1]
Liabilities:
Interest rate lock liability	157,316	[3]
Total liabilities	157,316
Estimate of Fair Value Measurement [Member]
Assets:
Deferred compensation plan asset	26,527	[1]
Liabilities:
Interest rate lock liability	157,316	[3]
Deferred compensation plan liability	36,928	[2]
Total liabilities	$ 194,244

[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 $25,792.

[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.

[3] The interest rate lock liability is measured at the present value of the expected future cash flows using market-based observable inputs. See Note 15.