Income Taxes (Effective Income Tax Rate Reconciliation) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Statutory rate applied to pre-tax income	$ 5,905	$ 30,202	$ 27,245
State income taxes, net of federal benefit	(13,463)	3,399	(2,210)
Foreign	1,854	2,136	(1,263)
Tax exempt portion of WilmerHale settlement	0	0	(4,344)
Revaluation of contingent purchase price	5,930	(511)	(1,735)
Tax credits	(6,052)	(1,712)	(1,000)
Lobbying costs	0	171	0
Acquisition costs	3,024	0	0
Meals and entertainment	468	386	349
Uncertain tax positions	2,574	542	0
Other	1,120	425	(567)
(Decrease) to valuation allowances		0	(66,509)
Income tax provision (benefit)	$ 1,360	$ 35,038	$ (50,034)