Basis of Presentation (Tables)

6 Months Ended

Jun. 30, 2013

Basis of Presentation

Schedule of allowances for doubtful accounts

Allowance for doubtful accounts (in thousands):

Balance, December 31, 2011	$	1,158
Provision	19
Recoveries	—
Charge-offs	(347		)
Balance, December 31, 2012	$	830
Provision	385
Recoveries	(42		)
Charge-offs	(167		)
Balance, June 30, 2013	$	1,006

Estimated allowance for appeals and estimated liability for appeals (in thousands):

Balance, December 31, 2011	$	10,383
Provision	20,513
Appeals found in Providers favor	(2,124		)
Balance, December 31, 2012	$	28,772	*
Provision	12,197
Appeals found in Providers favor	(4,679		)
Balance, June 30, 2013	$	36,290	*

*Includes $10,949 and $6,985 related to estimated allowance for appeals that apply to uncollected accounts receivable as of June 30, 2013 and December 31, 2012, respectively.