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Retirement Plans (Quantitative Disclosures of Retirement Income Plan's Invested Assets that are Measured at Fair Value on a Recurring Basis) (Details) (Retirement Income Plan [Member], USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Total Assets	$ 225,817,000	$ 207,150,000	$ 182,614,000
Fair Value [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	225,966,000	207,088,000
Fair Value [Member] | Investment Funds [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	205,471,000	174,014,000
Fair Value [Member] | Alternative Investments [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	12,159,000	12,631,000
Fair Value [Member] | Equity Securities [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	6,350,000	17,835,000
Fair Value [Member] | Short-term Investments [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	963,000	1,629,000
Fair Value [Member] | Deposit Administration Contracts [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	1,023,000	979,000
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	200,810,000	183,752,000
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] | Investment Funds [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	193,497,000	164,288,000
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] | Alternative Investments [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	0	0
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] | Equity Securities [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	6,350,000	17,835,000
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] | Short-term Investments [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	963,000	1,629,000
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] | Deposit Administration Contracts [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	0	0
Significant Other Observable Inputs (Level 2) [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	12,997,000	10,705,000
Significant Other Observable Inputs (Level 2) [Member] | Investment Funds [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	11,974,000	9,726,000
Significant Other Observable Inputs (Level 2) [Member] | Alternative Investments [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	0	0
Significant Other Observable Inputs (Level 2) [Member] | Equity Securities [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	0	0
Significant Other Observable Inputs (Level 2) [Member] | Short-term Investments [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	0	0
Significant Other Observable Inputs (Level 2) [Member] | Deposit Administration Contracts [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	1,023,000	979,000
Significant Unobservable Inputs (Level 3) [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	12,159,000	12,631,000
Significant Unobservable Inputs (Level 3) [Member] | Investment Funds [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	0	0
Significant Unobservable Inputs (Level 3) [Member] | Alternative Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	12,159,000	12,631,000	15,180,000
Significant Unobservable Inputs (Level 3) [Member] | Alternative Investments [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	12,159,000	12,631,000
Significant Unobservable Inputs (Level 3) [Member] | Equity Securities [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	0	0
Significant Unobservable Inputs (Level 3) [Member] | Short-term Investments [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	0	0
Significant Unobservable Inputs (Level 3) [Member] | Deposit Administration Contracts [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	0	0
International equity [Member] | Fair Value [Member] | Investment Funds [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	17,548,000	15,751,000
International equity [Member] | Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] | Investment Funds [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	5,574,000	6,025,000
International equity [Member] | Significant Other Observable Inputs (Level 2) [Member] | Investment Funds [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	11,974,000	9,726,000
International equity [Member] | Significant Unobservable Inputs (Level 3) [Member] | Investment Funds [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	0	0
Domestic large capitalization [Member] | Fair Value [Member] | Investment Funds [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	30,436,000	22,910,000
Domestic large capitalization [Member] | Fair Value [Member] | Short-term Investments [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets		9,938,000
Domestic large capitalization [Member] | Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] | Investment Funds [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	30,436,000	22,910,000
Domestic large capitalization [Member] | Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] | Short-term Investments [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets		9,938,000
Domestic large capitalization [Member] | Significant Other Observable Inputs (Level 2) [Member] | Investment Funds [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	0	0
Domestic large capitalization [Member] | Significant Other Observable Inputs (Level 2) [Member] | Short-term Investments [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets		0
Domestic large capitalization [Member] | Significant Unobservable Inputs (Level 3) [Member] | Investment Funds [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	0	0
Domestic large capitalization [Member] | Significant Unobservable Inputs (Level 3) [Member] | Short-term Investments [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets		0
Small And Mid Capitalization Securities [Member] | Fair Value [Member] | Investment Funds [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	6,326,000	6,805,000
Small And Mid Capitalization Securities [Member] | Fair Value [Member] | Short-term Investments [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	6,350,000	7,897,000
Small And Mid Capitalization Securities [Member] | Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] | Investment Funds [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	6,326,000	6,805,000
Small And Mid Capitalization Securities [Member] | Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] | Short-term Investments [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	6,350,000	7,897,000
Small And Mid Capitalization Securities [Member] | Significant Other Observable Inputs (Level 2) [Member] | Investment Funds [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	0	0
Small And Mid Capitalization Securities [Member] | Significant Other Observable Inputs (Level 2) [Member] | Short-term Investments [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	0	0
Small And Mid Capitalization Securities [Member] | Significant Unobservable Inputs (Level 3) [Member] | Investment Funds [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	0	0
Small And Mid Capitalization Securities [Member] | Significant Unobservable Inputs (Level 3) [Member] | Short-term Investments [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	0	0
Global Asset Allocation [Member] | Fair Value [Member] | Investment Funds [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	27,257,000	20,778,000
Global Asset Allocation [Member] | Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] | Investment Funds [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	27,257,000	20,778,000
Global Asset Allocation [Member] | Significant Other Observable Inputs (Level 2) [Member] | Investment Funds [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	0	0
Global Asset Allocation [Member] | Significant Unobservable Inputs (Level 3) [Member] | Investment Funds [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	0	0
Extended Duration Fixed Maturity [Member] | Fair Value [Member] | Investment Funds [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	96,920,000	50,556,000
Extended Duration Fixed Maturity [Member] | Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] | Investment Funds [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	96,920,000	50,556,000
Extended Duration Fixed Maturity [Member] | Significant Other Observable Inputs (Level 2) [Member] | Investment Funds [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	0	0
Extended Duration Fixed Maturity [Member] | Significant Unobservable Inputs (Level 3) [Member] | Investment Funds [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	0	0
Domestic Core Fixed Maturity [Member] | Fair Value [Member] | Investment Funds [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets		29,984,000
Domestic Core Fixed Maturity [Member] | Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] | Investment Funds [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets		29,984,000
Domestic Core Fixed Maturity [Member] | Significant Other Observable Inputs (Level 2) [Member] | Investment Funds [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets		0
Domestic Core Fixed Maturity [Member] | Significant Unobservable Inputs (Level 3) [Member] | Investment Funds [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets		0
Global bond high yield emerging markets [Member] | Fair Value [Member] | Investment Funds [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	26,984,000	27,230,000
Global bond high yield emerging markets [Member] | Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] | Investment Funds [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	26,984,000	27,230,000
Global bond high yield emerging markets [Member] | Significant Other Observable Inputs (Level 2) [Member] | Investment Funds [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	0	0
Global bond high yield emerging markets [Member] | Significant Unobservable Inputs (Level 3) [Member] | Investment Funds [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	0	0
Equity Long Short Hedge [Member] | Fair Value [Member] | Alternative Investments [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	41,000	41,000
Equity Long Short Hedge [Member] | Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] | Alternative Investments [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	0	0
Equity Long Short Hedge [Member] | Significant Other Observable Inputs (Level 2) [Member] | Alternative Investments [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	0	0
Equity Long Short Hedge [Member] | Significant Unobservable Inputs (Level 3) [Member] | Alternative Investments [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	41,000	41,000
Private Equity [Member] | Fair Value [Member] | Alternative Investments [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	9,899,000	10,385,000
Private Equity [Member] | Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] | Alternative Investments [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	0	0
Private Equity [Member] | Significant Other Observable Inputs (Level 2) [Member] | Alternative Investments [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	0	0
Private Equity [Member] | Significant Unobservable Inputs (Level 3) [Member] | Alternative Investments [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	9,899,000	10,385,000
Real Estate Strategy [Member] | Fair Value [Member] | Alternative Investments [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	2,219,000	2,205,000
Real Estate Strategy [Member] | Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] | Alternative Investments [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	0	0
Real Estate Strategy [Member] | Significant Other Observable Inputs (Level 2) [Member] | Alternative Investments [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	0	0
Real Estate Strategy [Member] | Significant Unobservable Inputs (Level 3) [Member] | Alternative Investments [Member] | Fair value, recurring [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Assets	$ 2,219,000	$ 2,205,000

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- Definition

Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Section 35

-Paragraph 50

-URI http://asc.fasb.org/extlink&oid=29635418&loc=d3e12355-114930

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