BusinessCombinationAndDeconsolidationDisclosure (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 1,500		$ 1,500
Revenues	95,122	$ 84,888	189,304	$ 173,192
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	6,916	$ 6,842	15,806	$ 13,890
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	916		1,424
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ (406)		$ (383)