CONDENSED CONSOLIDATED BALANCE SHEET (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Current Assets:
Cash and cash equivalents	$ 17,731	$ 16,557
Restricted cash	38,363	6,896
Accounts receivable, net	120,713	174,913
Inventories	62,966	55,609
Regulatory assets	46,167	37,719
Deferred income taxes	25,872	14,301
Other	8,668	14,961
Total current assets	320,480	320,956
Property, plant, and equipment, net	2,799,823	2,690,128
Goodwill	355,128	355,128
Regulatory assets	349,153	316,952
Other noncurrent assets	49,714	32,096
Total assets	3,874,298	3,715,260
Current Liabilities:
Current maturities of capital leases	1,707	1,662
Short-term borrowings	169,944	140,950
Accounts payable	61,942	92,957
Accrued expenses	206,864	181,613
Regulatory liabilities	52,613	46,406
Total current liabilities	493,070	463,588
Long-term capital leases	28,605	29,895
Long-term debt	1,182,092	1,155,097
Deferred income taxes	435,465	395,333
Noncurrent regulatory liabilities	360,209	348,053
Other noncurrent liabilities	293,171	292,624
Total liabilities	2,792,612	2,684,590
Commitments and Contingencies (Note 14)
Shareholders' Equity:
Common stock, par value $0.01; authorized 200,000,000 shares; issued and outstanding 42,753,751 and 39,143,568 shares, respectively; Preferred stock, par value $0.01; authorized 50,000,000 shares; none issued	428	423
Treasury stock at cost	(92,625)	(91,744)
Paid-in capital	926,390	910,184
Retained earnings	246,182	209,091
Accumulated other comprehensive income	1,311	2,716
Total shareholders' equity	1,081,686	1,030,670
Total liabilities and shareholders' equity	$ 3,874,298	$ 3,715,260