Fair Value Disclosures (Details) - USD ($) $ in Thousands	Dec. 31, 2016		Dec. 31, 2015
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	$ 8,393	[1]	$ 8,353	[2]
Bond [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	1,925		1,772
Large Cap [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	2,630		2,686
International [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	1,034		1,449
Mid Cap [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	1,013		530
Small Cap [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	655		425
REIT Fund [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	252
Balanced [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure			450
Money Market Funds [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	884		1,041
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	8,393	[1]	8,353	[2]
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Bond [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	1,925		1,772
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Large Cap [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	2,630		2,686
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | International [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	1,034		1,449
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Mid Cap [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	1,013		530
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Small Cap [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	655		425
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | REIT Fund [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	252
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Balanced [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure			450
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Money Market Funds [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	884		1,041
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0	[1]	0	[2]
Significant Other Observable Inputs (Level 2) [Member] | Bond [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0		0
Significant Other Observable Inputs (Level 2) [Member] | Large Cap [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0		0
Significant Other Observable Inputs (Level 2) [Member] | International [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0		0
Significant Other Observable Inputs (Level 2) [Member] | Mid Cap [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0		0
Significant Other Observable Inputs (Level 2) [Member] | Small Cap [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0		0
Significant Other Observable Inputs (Level 2) [Member] | REIT Fund [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0
Significant Other Observable Inputs (Level 2) [Member] | Balanced [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure			0
Significant Other Observable Inputs (Level 2) [Member] | Money Market Funds [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0		0
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0	[1]	0	[2]
Significant Unobservable Inputs (Level 3) [Member] | Bond [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0		0
Significant Unobservable Inputs (Level 3) [Member] | Large Cap [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0		0
Significant Unobservable Inputs (Level 3) [Member] | International [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0		0
Significant Unobservable Inputs (Level 3) [Member] | Mid Cap [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0		0
Significant Unobservable Inputs (Level 3) [Member] | Small Cap [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0		0
Significant Unobservable Inputs (Level 3) [Member] | REIT Fund [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0
Significant Unobservable Inputs (Level 3) [Member] | Balanced [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure			0
Significant Unobservable Inputs (Level 3) [Member] | Money Market Funds [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0		0
Prepaid Expenses and Other Current Assets [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Deferred Compensation Plan Assets	900		900
Other Non-Current Assets [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Deferred Compensation Plan Assets	$ 7,500		$ 7,500

[1] As of December 31, 2016, $0.9 million and $7.5 million were included in “Prepaid expenses and other current assets” (liability offset in “Other accrued expenses and other current liabilities”) and “Other non-current assets” (liability offset in “Deferred compensation”), respectively, in the consolidated balance sheets reflecting the non-qualified Deferred Compensation Plan assets.

[2] As of December 31, 2015, $0.9 million and $7.5 million were included in “Prepaid expenses and other current assets” (liability offset in “Other accrued expenses and other current liabilities”) and “Other non-current assets” (liability offset in “Deferred compensation”), respectively, in the consolidated balance sheets reflecting the non-qualified Deferred Compensation Plan assets.