Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
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-Section 30
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Name:	us-gaap_BusinessCombinationConsiderationTransferred1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Acquisitions (Details) - USD ($) $ in Thousands	12 Months Ended
Acquisitions (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Business Acquisitions [Abstract]
Goodwill acquired	$ 0	$ 6,726
Retirement Plan Services, LLC [Member]
Business Acquisitions [Abstract]
Total consideration paid		13,000
Goodwill acquired		6,700
Contingent consideration, liability		$ 5,100
Downeast Pension Services, Inc.[Member]
Business Acquisitions [Abstract]
Total consideration paid			$ 5,700
Goodwill acquired			2,600
Contingent consideration, liability			$ 1,700