Income Taxes Uncertain Tax Positions (Details) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Significant Change in Unrecognized Tax Benefits is Reasonably Possible
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	$ 300,000	$ 600,000	$ 600,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	100,000	100,000	100,000
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at January 1	2,302,000us-gaap_UnrecognizedTaxBenefits	3,886,000us-gaap_UnrecognizedTaxBenefits	4,388,000us-gaap_UnrecognizedTaxBenefits
Additions based on current year tax positions	512,000	364,000	258,000
Changes for tax positions of prior years	33,000	(907,000)	113,000
Settlements	(165,000)	(264,000)	(82,000)
Additions due to acquired business	0	414,000	0
Reductions due to lapses in statutes of limitation	(241,000)	(1,191,000)	(791,000)
Balance at December 31	$ 2,441,000us-gaap_UnrecognizedTaxBenefits	$ 2,302,000us-gaap_UnrecognizedTaxBenefits	$ 3,886,000us-gaap_UnrecognizedTaxBenefits

Unrecognized Tax Benefits Resulting From Acquired Business

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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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