CONDENSED CONSOLIDATED BALANCE SHEET - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current Assets:
Cash and cash equivalents	$ 12,433	$ 5,079
Restricted cash	4,852	4,426
Accounts receivable, net	142,552	159,556
Inventories	42,277	49,206
Regulatory assets	33,037	50,041
Other	9,501	11,887
Total current assets	244,652	280,195
Property, plant, and equipment, net	4,223,690	4,214,892
Goodwill	357,586	357,586
Regulatory assets	628,455	602,943
Other noncurrent assets	45,918	43,705
Total Assets	5,500,301	5,499,321
Current Liabilities:
Current maturities of capital leases	2,016	1,979
Short-term borrowings	228,901	300,811
Accounts payable	56,446	79,311
Accrued expenses	238,676	205,370
Regulatory liabilities	19,031	26,361
Total current liabilities	545,070	613,832
Long-term capital leases	23,833	24,346
Long-term debt	1,793,636	1,793,338
Deferred income taxes	604,018	575,582
Noncurrent regulatory liabilities	401,131	396,225
Other noncurrent liabilities	423,410	419,771
Total Liabilities	3,791,098	3,823,094
Commitments and Contingencies (Note 12)
Shareholders' Equity:
Common stock, par value $0.01; authorized 200,000,000 shares; issued and outstanding 52,085,415 and 48,444,284 shares, respectively; Preferred stock, par value $0.01; authorized 50,000,000 shares; none issued	521	520
Treasury stock at cost	(97,240)	(95,769)
Paid-in capital	1,387,200	1,384,271
Retained earnings	428,292	396,919
Accumulated other comprehensive loss	(9,570)	(9,714)
Total Shareholders' Equity	1,709,203	1,676,227
Total Liabilities and Shareholders' Equity	$ 5,500,301	$ 5,499,321