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Company's Demand Deposits and Temporary Cash Investments (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Risks And Uncertainties [Abstract]
Deposits in FDIC and SIPC-insured institutions under insurance limits	$ 191,457	$ 13,860
Deposits in FDIC and SIPC-insured institutions over insurance limits	38,425	106,849
Deposits in foreign banks	22,698	21,479
Total cash and cash equivalents	252,580	142,188
Less outstanding checks and other reconciling items	(7,551)	(99,360)
Cash and cash equivalents	$ 245,029	$ 42,828	$ 35,152	$ 113,346

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Bank Checks Outstanding and Other Reconciling Items

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Total cash and cash equivalents.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 4
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The amount of cash deposited in financial institutions as of the balance sheet date that is insured by the Federal Deposit Insurance Corporation.

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The amount of deposits held by branches of foreign institutions.

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