Income Taxes (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Effective income tax rate, continuing operations			27.80%	(23.30%)
Gross unrecognized tax benefits, net of interest and penalties	$ 1,000,000		$ 1,000,000		$ 1,500,000
Tax benefit recognized due to expiration of statute of limitations	0		500,000
Income Tax Expense (Benefit), Intraperiod Tax Allocation	0	(4,200,000)	0	(4,200,000)
Total income tax payments, net of refunds	7,270,000	1,122,000	9,539,000	2,615,000
Less: credits or offsets	1,339,000	816,000	1,724,000	1,424,000
Cash paid, net	$ 5,931,000	$ 306,000	$ 7,815,000	$ 1,191,000