(Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	$ 7,268	[1]	$ 7,957	[2]
BondMutualFund [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	1,639		1,967
MidCapMutualCap [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	343		915
Balanced [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	337		234
SmallCap [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	437		560
InternationalMutualF [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	937		1,053
LargeCapMutualFun [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	1,753		1,463
Money Market Funds [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	1,822		1,765
TotalMutualFund [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	5,446		6,192
Fair Value, Inputs, Level 1 [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	7,268	[1]	7,957	[2]
Fair Value, Inputs, Level 1 [Member] | BondMutualFund [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	1,639		1,967
Fair Value, Inputs, Level 1 [Member] | MidCapMutualCap [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	343		915
Fair Value, Inputs, Level 1 [Member] | Balanced [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	337		234
Fair Value, Inputs, Level 1 [Member] | SmallCap [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	437		560
Fair Value, Inputs, Level 1 [Member] | InternationalMutualF [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	937		1,053
Fair Value, Inputs, Level 1 [Member] | LargeCapMutualFun [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	1,753		1,463
Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	1,822		1,765
Fair Value, Inputs, Level 1 [Member] | TotalMutualFund [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	5,446		6,192
Fair Value, Inputs, Level 2 [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0	[1]	0	[2]
Fair Value, Inputs, Level 2 [Member] | BondMutualFund [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0		0
Fair Value, Inputs, Level 2 [Member] | MidCapMutualCap [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0		0
Fair Value, Inputs, Level 2 [Member] | Balanced [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0		0
Fair Value, Inputs, Level 2 [Member] | SmallCap [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0		0
Fair Value, Inputs, Level 2 [Member] | InternationalMutualF [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0		0
Fair Value, Inputs, Level 2 [Member] | LargeCapMutualFun [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0		0
Fair Value, Inputs, Level 2 [Member] | Money Market Funds [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0		0
Fair Value, Inputs, Level 2 [Member] | TotalMutualFund [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0		0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0	[1]	0	[2]
Fair Value, Inputs, Level 3 [Member] | BondMutualFund [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0		0
Fair Value, Inputs, Level 3 [Member] | MidCapMutualCap [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0		0
Fair Value, Inputs, Level 3 [Member] | Balanced [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0		0
Fair Value, Inputs, Level 3 [Member] | SmallCap [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0		0
Fair Value, Inputs, Level 3 [Member] | InternationalMutualF [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0		0
Fair Value, Inputs, Level 3 [Member] | LargeCapMutualFun [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0		0
Fair Value, Inputs, Level 3 [Member] | Money Market Funds [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure	0		0
Fair Value, Inputs, Level 3 [Member] | TotalMutualFund [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Assets, Fair Value Disclosure			$ 0

[1] At June 30, 2012, $0.4 million and $6.9 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 sheet reflecting the non-qualified Deferred Compensation Plan assets.

[2] At December 31, 2011, $0.8 million and $7.1 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 sheet reflecting the non-qualified Deferred Compensation Plan assets.