Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Assets
Cash and cash equivalents	$ 257,208	$ 300,478
Accounts receivable and unbilled revenues, net	224,179	242,766
Available-for-sale investment securities, at fair value	894,021	820,648
Stock in Federal Home Loan Bank, at cost	11,218	10,678
Loans receivable held for investment, net	4,699,623	4,565,781
Loans held for sale, at lower of cost or fair value	6,217	4,631
Property, plant and equipment, net of accumulated depreciation of $2,387,013 and $2,339,319 at the respective dates	4,482,990	4,377,658
Regulatory assets	885,114	896,731
Other	436,479	480,457
Goodwill	82,190	82,190
Total assets	11,979,239	11,782,018
Liabilities
Accounts payable	130,160	138,523
Interest and dividends payable	23,490	26,042
Deposit liabilities	5,232,203	5,025,254
Short-term borrowings—other than bank	115,985	103,063
Other bank borrowings	272,887	328,582
Long-term debt, net—other than bank	1,578,842	1,578,368
Deferred income taxes	712,199	680,877
Regulatory liabilities	391,003	371,543
Contributions in aid of construction	516,750	506,087
Defined benefit pension and other postretirement benefit plans liability	578,651	589,918
Other	426,594	471,828
Total liabilities	9,978,764	9,820,085
Preferred stock of subsidiaries - not subject to mandatory redemption	34,293	34,293
Commitments and contingencies
Shareholders’ equity
Preferred stock, no par value, authorized 10,000,000 shares; issued: none	0	0
Common stock, no par value, authorized 200,000,000 shares; issued and outstanding: 108,187,063 shares and 107,460,406 shares at the respective dates	1,647,138	1,629,136
Retained earnings	334,398	324,766
Accumulated other comprehensive loss, net of tax benefits	(15,354)	(26,262)
Total shareholders’ equity	1,966,182	1,927,640
Total liabilities and shareholders’ equity	$ 11,979,239	$ 11,782,018