Fair Value Disclosure (Details) (USD $)	Dec. 31, 2014		Dec. 31, 2013
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	$ 8,786,000	[1]	$ 8,995,000	[2]
Bond [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	1,879,000		1,495,000
Large Cap [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	2,852,000		2,925,000
International [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	1,405,000		1,227,000
Mid Cap [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	606,000		750,000
Small Cap [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	470,000		738,000
Balanced [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	339,000		348,000
Money Market Funds [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	1,235,000		1,512,000
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	8,786,000	[1]	8,995,000	[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	1,879,000		1,495,000
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	2,852,000		2,925,000
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	1,405,000		1,227,000
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	606,000		750,000
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	470,000		738,000
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	339,000		348,000
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	1,235,000		1,512,000
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] | Balanced [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0		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] | Balanced [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0		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	700,000		300,000
Other Non-Current Assets [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Deferred Compensation Plan Assets	$ 8,100,000		$ 8,700,000

[1] As of December 31, 2014, $0.7 million and $8.1 million are 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, 2013, $0.3 million and $8.7 million are 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.