Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2018

Accounting Policies [Abstract]

Disaggregation of Revenue

In the following table, revenue from contracts with customers is disaggregated by class of customers:

	Three Months Ended March 31,
	2018		2017
Residential	$	91,319	$	75,865
Business	27,057		22,026
Industrial	7,579		6,954
Public authorities	5,444		4,146
Other	2,855		3,821
Total revenue from contracts with customers	$	134,254	$	112,812

The following table disaggregates the Company’s operating revenue by source:

	Three Months Ended March 31,
	2018			2017
Revenue from contracts with customers	$	134,254		$	112,812
Regulatory balancing account revenue	(2,007		)	9,224
Total operating revenue	$	132,247		$	122,036

	Three Months Ended March 31,
	2018		2017
Operating and maintenance revenue	$	3,165	$	1,913
Other non-regulated revenue	743		1,042
Non-regulated revenue from contracts with customers	$	3,908	$	2,955
Lease revenue	$	511	$	507
Total non-regulated revenue	$	4,419	$	3,462

Schedule of Cash, Cash Equivalents, and Restricted Cash

The following table provides a reconciliation of cash, cash equivalents, and restricted cash within the Condensed Consolidated Balance Sheets that sum to the total of the same such amounts shown on the Condensed Consolidated Statements of Cash Flows:

	March 31, 2018		December 31, 2017
Cash and cash equivalents	34,702		94,776
Restricted cash (included in "taxes, prepaid expenses and other assets")	631		576
Total cash, cash equivalents, and restricted cash shown in the statements of cash flows	$	35,333	$	95,352

Schedule of New Accounting Pronouncements and Changes in Accounting Principles

The following table shows the effect of the accounting change to the Condensed Consolidated Statements of Cash Flows:

	Three Months Ended March 31, 2017
Condensed Consolidated Statements of Cash Flows line item	As Reported on Form 10-Q			Adjusted Balance on Form 10-Q			Increase (Decrease) from Retrospective Adoption
Change in restricted cash	$	(260	)	$	—		$	260
Net cash used in investing activities	$	(52,499	)	$	(52,239	)	$	260
Change in cash, cash equivalents, and restricted cash	$	(13,502	)	$	(13,242	)	$	260
Cash, cash equivalents, and restricted cash at beginning of period	$	25,492		$	25,935		$	443
Cash, cash equivalents, and restricted cash at end of period	$	11,990		$	12,693		$	703

The following table shows the effect of the accounting change to the Condensed Consolidated Statements of (Loss) Income for the three months ended March 31, 2017:

	Three Months Ended March 31, 2017
Condensed Consolidated Statement of (Loss) Income line item	As Reported on Form 10-Q		Adjusted Balance on Form 10-Q			Increase (Decrease) from Retrospective Adoption
Administrative and general	$	25,249	$	22,746		$	(2,503	)
Total operating expenses	$	113,986	$	111,483		$	(2,503	)
Net operating income	$	8,050	$	10,553		$	2,503
Other components of net periodic benefit cost	$	—	$	(2,503	)	$	2,503
Net other income	$	1,298	$	(1,205	)	$	(2,503	)