Income Taxes Income Taxes - Reconciliation of Effective Tax Rate to Statutory Tax Rate (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Effective Income Tax Rate Reconciliation
Income taxes at U.S. federal statutory rate	$ 12,276	$ 7,415	$ (14,917)
Net state income taxes	1,172	1,570	(4,693)
Tax credits	(1,295)	(244)	0
Tax Cuts and Jobs Act	0	0	(53,442)
Noncontrolling interest	0	(1,793)	(1,091)
Unrecognized tax benefits	(1,958)	(1,443)	9,566
Valuation allowances and write off of tax attributes (5)	(50,219)	(58)	247
Indemnification revenue / expense	42	(44)	692
Executive compensation limitation	1,102	977	2,433
Stock	66	(455)	(858)
Other	(331)	225	980
Provision for (benefit from) income taxes	$ (39,145)	$ 6,150	$ (61,083)

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Effective Income Tax Rate Reconciliation, Nondeductible Expense, Executive Compensation, Amount

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Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to expense for award under share-based payment arrangement. Excludes expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to noncontrolling interest income (loss) exempt from income taxes.

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