Fair Value of Financial Instruments (Details 2) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Carrying Amount [Member]
Assets:
Note receivable from CareCentrix	$ 25,000	$ 25,000
Seller financing note receivable from CareCentrix	3,471	3,471
Liabilities:
Long-term obligation	1,177,000	935,182
Estimate Fair Value [Member]
Assets:
Note receivable from CareCentrix	26,403	25,220
Seller financing note receivable from CareCentrix	3,471	3,471
Liabilities:
Long-term obligation	$ 1,183,863	$ 912,818