Acquisitions and Dispositions Assets and Liabilities Sold as Part of Divestiture (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Sep. 03, 2019	Dec. 31, 2018
Business Combination, Separately Recognized Transactions [Line Items]
Cash	$ 80,820		$ 84,524
Intangible assets	290,211		294,603
Goodwill	662,375		548,685
Total assets	1,137,572		997,725
Accrued expenses and other current liabilities	36,144		18,980
Long-term liabilities	400,525		316,905
Total liabilities	$ 494,057		365,185
SimpleTax
Business Combination, Separately Recognized Transactions [Line Items]
Cash		$ 2,198	1,088
Accounts receivable		12	27
Intangible assets		119	143
Goodwill		4,199	4,102
Total assets		6,528	5,360
Accrued expenses and other current liabilities		102	77
Long-term liabilities		38	37
Total liabilities		$ 140	$ 114