Employee Benefit Plans (Details 9a) (Pension Benefit Plan, USD $) In Thousands, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Fair Value of plan assets, Ending Balance	$ 37,904		$ 32,196		$ 29,989
Fair Value, Level 2 | Common Trust Fund-Large Cap
Fair Value of plan assets, Ending Balance	10,409		7,641
Fair Value, Level 2 | Money Market Funds - Cash and Cash Equivalents
Fair Value of plan assets, Ending Balance	747		1,281
Fair Value, Level 2 | Corporate Bonds
Fair Value of plan assets, Ending Balance	3,575		2,324
Fair Value, Level 2 | Mortgage-Backed Securities
Fair Value of plan assets, Ending Balance	2,570	[1]	2,527	[1]
Fair Value, Level 2 | Asset-Backed Securities
Fair Value of plan assets, Ending Balance	25		27
Fair Value, Level 2 | Agency/US/State/Municipal Debt
Fair Value of plan assets, Ending Balance	5,312		4,532
Fair Value, Level 2 | Sovereign/Non-US Debt
Fair Value of plan assets, Ending Balance	63		75
Fair Value, Level 2 | Investments
Fair Value of plan assets, Ending Balance	22,701		18,407
Fair Value, Total | Common Trust Fund-Large Cap
Fair Value of plan assets, Ending Balance	10,409		7,641
Fair Value, Total | Mutual Funds - Mid Cap Growth
Fair Value of plan assets, Ending Balance	703		655
Fair Value, Total | Mutual Funds - Mid Cap Value
Fair Value of plan assets, Ending Balance	412		356
Fair Value, Total | Mutual Funds - Foreign Small Mid Growth
Fair Value of plan assets, Ending Balance	255		214
Fair Value, Total | Mutual Funds - Foreign Large Core
Fair Value of plan assets, Ending Balance			97
Fair Value, Total | Mutual Funds - Foreign Large Blend
Fair Value of plan assets, Ending Balance	710		586
Fair Value, Total | Mutual Funds - Diversied Emerging Markets
Fair Value of plan assets, Ending Balance	222		281
Fair Value, Total | Mutual Funds - Preferred Stock Index
Fair Value of plan assets, Ending Balance	82		74
Fair Value, Total | Money Market Funds - Cash and Cash Equivalents
Fair Value of plan assets, Ending Balance	3,132		2,670
Fair Value, Total | Equity Securities - Non-Financial Services
Fair Value of plan assets, Ending Balance	293		189
Fair Value, Total | Equity Securities - Financial Services
Fair Value of plan assets, Ending Balance	1,883		1,289
Fair Value, Total | Equity Securities - Utilities
Fair Value of plan assets, Ending Balance	1,334		1,629
Fair Value, Total | Equity Securities - Consumer Growth
Fair Value of plan assets, Ending Balance	1,778		1,685
Fair Value, Total | Equity Securities - Consumer Staples
Fair Value of plan assets, Ending Balance	931		956
Fair Value, Total | Equity Securities - Consumer Cyclicals
Fair Value of plan assets, Ending Balance	886		853
Fair Value, Total | Equity Securities - Industrial Resources
Fair Value of plan assets, Ending Balance	224		159
Fair Value, Total | Equity Securities - Capital Equipment
Fair Value of plan assets, Ending Balance	669		651
Fair Value, Total | Equity Securities - Technology
Fair Value of plan assets, Ending Balance	1,324		1,345
Fair Value, Total | Equity Securities - Energy
Fair Value of plan assets, Ending Balance	860		1,160
Fair Value, Total | Equity Securities - Other
Fair Value of plan assets, Ending Balance			40
Fair Value, Total | Corporate Bonds
Fair Value of plan assets, Ending Balance	3,575		2,324
Fair Value, Total | Mortgage-Backed Securities
Fair Value of plan assets, Ending Balance	2,570	[1]	2,527	[1]
Fair Value, Total | Asset-Backed Securities
Fair Value of plan assets, Ending Balance	25		27
Fair Value, Total | Agency/US/State/Municipal Debt
Fair Value of plan assets, Ending Balance	5,312		4,661
Fair Value, Total | Sovereign/Non-US Debt
Fair Value of plan assets, Ending Balance	63		75
Fair Value, Total | CommoditiesMember
Fair Value of plan assets, Ending Balance	88		52
Fair Value, Total | Investments
Fair Value of plan assets, Ending Balance	37,904		32,196
Fair Value, Level 1 | Mutual Funds - Mid Cap Growth
Fair Value of plan assets, Ending Balance	703		655
Fair Value, Level 1 | Mutual Funds - Mid Cap Value
Fair Value of plan assets, Ending Balance	412		356
Fair Value, Level 1 | Mutual Funds - Foreign Small Mid Growth
Fair Value of plan assets, Ending Balance	255		214
Fair Value, Level 1 | Mutual Funds - Foreign Large Core
Fair Value of plan assets, Ending Balance			97
Fair Value, Level 1 | Mutual Funds - Foreign Large Blend
Fair Value of plan assets, Ending Balance	710		586
Fair Value, Level 1 | Mutual Funds - Diversied Emerging Markets
Fair Value of plan assets, Ending Balance	222		281
Fair Value, Level 1 | Mutual Funds - Preferred Stock Index
Fair Value of plan assets, Ending Balance	82		74
Fair Value, Level 1 | Money Market Funds - Cash and Cash Equivalents
Fair Value of plan assets, Ending Balance	2,385		1,389
Fair Value, Level 1 | Equity Securities - Non-Financial Services
Fair Value of plan assets, Ending Balance	293		189
Fair Value, Level 1 | Equity Securities - Financial Services
Fair Value of plan assets, Ending Balance	1,883		1,289
Fair Value, Level 1 | Equity Securities - Utilities
Fair Value of plan assets, Ending Balance	1,334		1,629
Fair Value, Level 1 | Equity Securities - Consumer Growth
Fair Value of plan assets, Ending Balance	1,778		1,685
Fair Value, Level 1 | Equity Securities - Consumer Staples
Fair Value of plan assets, Ending Balance	931		956
Fair Value, Level 1 | Equity Securities - Consumer Cyclicals
Fair Value of plan assets, Ending Balance	886		853
Fair Value, Level 1 | Equity Securities - Industrial Resources
Fair Value of plan assets, Ending Balance	224		159
Fair Value, Level 1 | Equity Securities - Capital Equipment
Fair Value of plan assets, Ending Balance	669		651
Fair Value, Level 1 | Equity Securities - Technology
Fair Value of plan assets, Ending Balance	1,324		1,345
Fair Value, Level 1 | Equity Securities - Energy
Fair Value of plan assets, Ending Balance	860		1,160
Fair Value, Level 1 | Equity Securities - Other
Fair Value of plan assets, Ending Balance			40
Fair Value, Level 1 | Agency/US/State/Municipal Debt
Fair Value of plan assets, Ending Balance			129
Fair Value, Level 1 | CommoditiesMember
Fair Value of plan assets, Ending Balance	88		52
Fair Value, Level 1 | Investments
Fair Value of plan assets, Ending Balance	$ 15,203		$ 13,789

[1] (1) Mortgage-backed securities represent AAA rated securities and substantially all of the asset-backed securities are highly-rated (Standard & Poor's rating of AA+), secured primarily by credit card, auto loan, and home equity receivables.