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Income Taxes, Net Operating Losses (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Federal
Operating Loss Carryforwards [Line Items]
Deferred tax asset for Federal NOL carryforward (entities not on Federal return)	8.8
Federal \| Minimum
Operating Loss Carryforwards [Line Items]
Expiration of NOL carryforwards	2013
Federal \| Maximum
Operating Loss Carryforwards [Line Items]
Expiration of NOL carryforwards	2032
State
Operating Loss Carryforwards [Line Items]
State NOL carryforwards	1,152.0
Deferred tax asset for State NOL carryforwards	54.4
State \| Minimum
Operating Loss Carryforwards [Line Items]
Expiration of NOL carryforwards	2013
State \| Maximum
Operating Loss Carryforwards [Line Items]
Expiration of NOL carryforwards	2032

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible domestic operating loss carryforwards. Excludes state and local operating loss carryforwards.

+ References+ Details

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible state and local operating loss carryforwards.

+ References+ Details