Income Taxes (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Income Taxes [Line Items]
Unrecognized tax benefits	$ 30,204,000	$ 29,510,000	$ 30,204,000	$ 29,510,000	$ 28,690,000
Effective income tax rate	11.60%	6.90%	10.80%	10.40%
Unrecognized tax benefits that would impact effective tax rate	12,999,000		12,999,000
Federal [Member]
Income Taxes [Line Items]
Change in operating loss carryforward			77,199,000
Operating loss carryforwards	180,895,000		180,895,000
Operating loss carryforwards, valuation allowance	0		0
Operating loss carryforwards, expiration beginning dates			Dec. 31, 2031
Unrecognized tax benefits	65,973,000		65,973,000
Deferred tax assets, operating loss carryforwards	246,868,000		246,868,000
State [Member]
Income Taxes [Line Items]
Change in operating loss carryforward			2,962,000
Operating loss carryforwards	546,256,000		546,256,000
Operating loss carryforwards, valuation allowance	5,232,000		5,232,000
Operating loss carryforwards, expiration beginning dates			Dec. 31, 2023
Unrecognized tax benefits	85,619,000		85,619,000
Deferred tax assets, operating loss carryforwards	$ 631,875,000		$ 631,875,000