Uncertain Tax Positions (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Uncertain Tax Positions [Abstract]
Unrecognized tax benefits that would affect the net effective income tax rate in any future period	$ 3,600,000	$ 3,000,000
Reconciliation of unrecognized tax benefits [Roll Forward]
Balance, beginning of period	5,635,000
Gross increases - current year tax positions	636,000
Balance, end of period	6,271,000
Interest and penalties accrued [Abstract]
Accrual for interest and penalties		100,000
Income taxes paid [Abstract]
Income tax paid	1,500,000
Company entered into an agreement whereby the former owners funded an escrow account	5,500,000
Tax Credits and Other Various Deductions [Member]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Estimated change in unrecognized tax benefits expected within the next twelve months	$ 1,900,000