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Cash and Cash Equivalents	12 Months Ended
	Dec. 31, 2018
Cash and Cash Equivalents [Abstract]
Cash and Cash Equivalents	4. Cash and Cash Equivalents The Company considers all highly liquid investments with original or remaining maturities of three months or less at the time of purchase to be cash equivalents. Cash and cash equivalents include cash balances held by our consolidated 50% owned subsidiaries and our majority owned construction joint ventures. At December 31, 2018 and 2017, cash and cash equivalents included $31.0 million and $31.1 million, respectively, attributable to our consolidated 50% owned subsidiaries. At December 31, 2018 and 2017, cash and cash equivalents included $20.5 million and $18.9 million, respectively, attributable to our majority owned construction joint ventures. Majority owned construction joint ventures and consolidated 50% owned subsidiaries cash balances are limited to joint venture activities and are not available for other projects, general cash needs or distribution to Sterling without approval of the board of directors, or equivalent body, of the respective joint ventures. Restricted cash of approximately $3.9 million and $3.6 million is included in "Other current assets" on the consolidated balance sheet as of December 31, 2018 and 2017. This represents $3.9 million and $3.0 million of cash deposited by the Company into a separate account and designated as collateral for a standby letter of credit in the same amount in accordance with contractual agreements, respectively. In addition, the December 31, 2017 balance includes approximately $0.6 million of cash deposited by a customer, for the benefit of the Company, in an escrow account which was released upon completion of the job. The Company holds cash on deposit in U.S. banks, at times, in excess of federally insured limits. Management believes that the risk associated with keeping cash deposits in excess of federal deposit insurance is not material.

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- Definition

The entire disclosure for cash and cash equivalent footnotes, which may include the types of deposits and money market instruments, applicable carrying amounts, restricted amounts and compensating balance arrangements. Cash and equivalents include: (1) currency on hand (2) demand deposits with banks or financial institutions (3) other kinds of accounts that have the general characteristics of demand deposits (4) 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. Generally, only investments maturing within three months from the date of acquisition qualify.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 305
-URI http://asc.fasb.org/topic&trid=2122426

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