Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

Accounting Policies [Abstract]

Schedule of Remaining Contractual Maturities for Chattel Paper Agreements

As of December 31,2016, the remaining contractual maturities of the chattel paper agreements were as follows:

(In thousands)		2017		2018		2019		2020		2021		Thereafter
Repurchase-to-Maturity Transactions:
Loans	$	559	$	620	$	595	$	568	$	432	$	1,121

Straight-Line Depreciation Rates

Provisions at composite straight-line depreciation rates approximate the following percentages for the cost of depreciable property:

	2016	2015	2014
Electric(a)	2.5 %	2.6 %	2.6 %
Gas(a)	2.1 %	1.7 %	1.7 %
Nonregulated	2.3 %	2.4 %	2.4 %

(a)In December 2015, the PSCW approved new depreciation rates, which were implemented and became effective as of January 1, 2016.