Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues:
Net patient revenues	$ 829,287	$ 735,837	$ 705,386
Other revenues	42,396	53,120	55,616
Net operating revenues	871,683	788,957	761,002
Costs and Expenses:
Salaries, wages and benefits	510,249	453,560	426,934
Other operating	217,143	194,989	196,230
Facility rent	39,731	39,449	39,355
Depreciation and amortization	34,384	28,547	29,792
Interest	2,165	331	455
Total costs and expenses	803,672	716,876	692,766
Income Before Non-Operating Income	68,011	72,081	68,236
Non-Operating Income	17,182	30,095	25,245
Income Before Income Taxes	85,193	102,176	93,481
Income Tax Provision	(31,824)	(37,563)	(34,181)
Net Income	53,369	64,613	59,300
Dividends to Preferred Stockholders	(8,670)	(8,671)	(8,671)
Net Income Available to Common Stockholders	$ 44,699	$ 55,942	$ 50,629
Earnings Per Common Share:
Basic (in Dollars per share)	$ 3.24	$ 4.05	$ 3.65
Diluted (in Dollars per share)	$ 3.14	$ 3.87	$ 3.57
Weighted Average Common Shares Outstanding:
Basic (in Shares)	13,816,095	13,829,626	13,852,709
Diluted (in Shares)	14,222,133	16,698,803	16,598,816
Dividends Declared Per Common Share (in Dollars per share)	$ 1.34	$ 1.26	$ 2.20