CONDENSED CONSOLIDATED BALANCE SHEET (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current Assets:
Cash and cash equivalents	$ 7,792	$ 5,928
Restricted cash	9,035	12,716
Accounts receivable, net	131,512	147,151
Inventories	41,676	59,532
Regulatory assets	40,925	48,900
Deferred income taxes	24,619	6,522
Other	8,297	9,450
Total current assets	263,856	290,199
Property, plant, and equipment, net	2,230,788	2,213,267
Goodwill	355,128	355,128
Regulatory assets	321,448	308,804
Other noncurrent assets	46,151	43,040
Total assets	3,217,371	3,210,438
Current Liabilities:
Current maturities of capital leases	1,538	1,370
Current maturities of long-term debt	0	3,792
Short-term borrowings	112,978	166,934
Accounts payable	52,396	76,735
Accrued expenses	215,935	193,939
Regulatory liabilities	32,390	33,184
Total current liabilities	415,237	475,954
Long-term capital leases	32,784	32,918
Long-term debt	905,055	905,049
Deferred income taxes	320,698	282,406
Noncurrent regulatory liabilities	270,594	265,987
Other noncurrent liabilities	393,301	389,012
Total liabilities	2,337,669	2,351,326
Commitments and Contingencies (Note 12)
Shareholders' Equity:
Common stock, par value $0.01; authorized 200,000,000 shares; issued and outstanding 39,967,749 and 36,385,268 respectively; Preferred stock, par value $0.01; authorized 50,000,000 shares; none issued	399	398
Treasury stock at cost	(90,198)	(90,273)
Paid-in capital	818,554	816,700
Retained earnings	147,316	128,631
Accumulated other comprehensive income	3,631	3,656
Total shareholders' equity	879,702	859,112
Total liabilities and shareholders' equity	$ 3,217,371	$ 3,210,438