Employee Benefit Plans (Details 9) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011
Pension Plan [Member]
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
2012	$ 1,236
2013	1,511
2014	1,701
2015	1,820
2016	2,237
2017-2021	15,115
SERP [Member]
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]
2012	1,191
2013	1,392
2014	10,782
2015	3,365
2016	44,737
2017-2021	$ 40,072

The amount of the aggregate benefits expected to be paid in the five fiscal years thereafter (the aggregate amount of benefits expected to be paid in years 6 through 10 after the date of the latest statement of financial position).

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph f

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (f)

-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920

Name:	us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsInFiveFiscalYearsThereafter
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant