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Composition of Certain Financial Statement Captions (Accrued Liabilities) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Items Included in Consolidated Statement of Financial Condition [Abstract]
Accrued employee compensation	$ 68,371	$ 88,960
Accrued consulting, outsourcing and professional fees	28,322	29,658
Accrued sub-advisory, distribution and other asset management fees	49,452	42,365
Accrued dividend payable	0	47,179
Accrued income taxes	11,164	5,583
Other accrued liabilities	50,366	51,313
Total accrued liabilities	$ 207,675	$ 265,058

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Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all currently due domestic and foreign income tax obligations.

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Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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