Acquisitions and Dispositions (Details Textual) - USD ($)				12 Months Ended
	Nov. 15, 2019	Apr. 01, 2019	Mar. 08, 2019	Dec. 31, 2018	Dec. 31, 2019
Business Acquisition [Line Items]
Deferred acquisition consideration				$ 83,695,000	$ 75,220,000
Laird - Partners [Member]
Business Acquisition [Line Items]
Remaining ownership interest acquired (percent)	35.00%
Aggregate purchase price	$ 2,389,000
Closing cash payment	1,588,000
Deferred acquisition consideration	801,000
Business Combination, Consideration Transferred, Including Equity Interest in Acquiree Held Prior to Combination	6,005,000
Business acquisitions and step-up transactions, net of tax	(5,045,000)
Business Combination, Acquisition of Less than 100 Percent, Redeemable Noncontrolling Interest, Fair Value	$ 2,656,000
Hunter PR LLC [Member]
Business Acquisition [Line Items]
Remaining ownership interest acquired (percent)		35.00%
Aggregate purchase price		$ 10,234,000
Closing cash payment		3,890,000
Deferred acquisition consideration		6,344,000
Business Combination, Consideration Transferred, Including Equity Interest in Acquiree Held Prior to Combination		20,178,000
Business acquisitions and step-up transactions, net of tax		(9,486,000)
Business Combination, Acquisition of Less than 100 Percent, Redeemable Noncontrolling Interest, Fair Value		$ 745,000
Aggregate 2018 Acquisitions [Member]
Business Acquisition [Line Items]
Aggregate purchase price				56,463,000
Deferred acquisition consideration				16,174,000
Business acquisitions and step-up transactions, net of tax				(9,790,000)
Granted				4,975,000
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value				15,411,000
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable				$ 1,011,561
Kingsdale Partners LP [Member]
Business Acquisition [Line Items]
Proceeds from divestiture of businesses			$ 50,000,000
Loss on disposition of business			$ (3,000,000)