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Bank Deposits (Scheduled Maturities of Certificates of Deposit) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Deposits Liabilities Balance Sheet Reported Amounts [Abstract]
Within one year	$ 4,036	$ 4,858
One to three years	690	623
Three to five years	21	140
Certificates of deposit, less than $100,000	4,747	5,621
Within one year	1,226,651	1,535,784
One to three years	88,374	195,159
Three to five years	19,229	26,772
Certificates of deposit, $100,000 and greater	1,334,254	1,757,715
Total certificates of deposit	$ 1,339,001	$ 1,763,336

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Amount of time deposit liabilities, including certificates of deposit.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 405
-Section 50
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