BusinessCombinationAndDeconsolidationDisclosure (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 1,500		$ 1,500
Revenues	95,165	$ 89,935	284,469	$ 263,127
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	6,171	$ 10,043	21,977	$ 23,933
Series of Individually Immaterial Business Acquisitions
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value			720
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Loss			237
Business Combination, Consideration Transferred			8,534
Goodwill, Acquired During Period			9,508
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	1,500		1,500
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	(254)		(254)
Revenues	1,907		3,331
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 332		$ (51)