Income Taxes (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Income Taxes [Line Items]
Deferred tax assets operating loss carry forwards domestic, utilized	$ 5,967,000
Deferred tax assets operating loss carry forwards state, utilized	374,000
Unrecognized tax benefits	25,314,000		25,292,000
Effective income tax rate	8.60%	10.90%
Unrecognized tax benefits that would impact effective tax rate	13,419,000
Federal [Member]
Income Taxes [Line Items]
Operating loss carryforwards	203,606,000
Operating loss carryforwards, valuation allowance	0
Operating loss carryforwards, expiration beginning dates	Jan. 01, 2032
Unrecognized tax benefits	56,826,000
Deferred tax assets, operating loss carryforwards	260,432,000
State [Member]
Income Taxes [Line Items]
Operating loss carryforwards	554,114,000
Operating loss carryforwards, expiration beginning dates	Jan. 01, 2023
Unrecognized tax benefits	83,543,000
Deferred tax assets, operating loss carryforwards	$ 637,657,000