Concentration of Risk and Enterprise Wide Disclosures

12 Months Ended

Dec. 31, 2016

Concentration of Risk and Enterprise Wide Disclosures

Accounts receivable include amounts billed to governmental agencies and private customers and do not bear interest. Balances billed to customers but not paid pursuant to retainage provisions generally become payable upon contract completion and acceptance by the owner. The table below presents the concentrations of current receivables (trade and retainage) at December 31, 2016 and December 31, 2015, respectively:



	December 31, 2016				December 31, 2015
Federal Government	$	5,542	4	%	$	4,230	4	%
State Governments	9,302		7	%	1,274		1	%
Local Governments	20,886		16	%	19,660		18	%
Private Companies	96,673		73	%	82,627		77	%
Total receivables	$	132,403	100	%	$	107,791	100	%

At December 31, 2016 and 2015, no single customer accounted for more than 10.0% of total current receivables.

Additionally, the table below represents concentrations of revenue by type of customer for the years ended December 31, 2016, 2015 and 2014.



	Year ended December 31,
	2016		%		2015		%		2014		%
Federal Government	$	40,361	7	%	$	45,439	10	%	$	47,390	13	%
State Governments	$	37,700	7	%	$	42,026	9	%	$	43,147	11	%
Local Governments	$	94,461	16	%	$	130,187	28	%	$	97,145	25	%
Private Companies	$	405,714	70	%	$	248,846	53	%	$	198,136	51	%
Total contract revenues	$	578,236	100	%	$	466,498	100	%	$	385,818	100	%

In the years ended December 31, 2016, 2015 and 2014 , no single customer exceeded 10.0% of total contract revenues.

The Company does not believe that the loss of any one of these customers would have a material adverse effect on the Company and its subsidiaries and affiliates since no single specific customer sustains such a large portion of receivables or contract revenue over time.

In addition, the commercial concrete construction segment primarily purchases concrete from select suppliers. The loss of one of these suppliers could adversely impact short-term operations.

Revenues generated outside the United States totaled 1.3%, 4.1% and 12.9% of total revenues for the years ended 2016, 2015 and 2014, respectively and were primarily located in the Caribbean.