Accounts Payable and Accrued Expenses

12 Months Ended

Dec. 31, 2014

8. Accounts Payable and Accrued Expenses:

Accounts payable and accrued expenses consist of the following (in thousands):


	December 31,
	2014		2013
Accounts payable	$	32,783	$	18,605
Accrued salaries and bonuses		231,390		189,439
Accrued payroll taxes and benefits		49,858		43,403
Accrued professional liability		19,718		19,324
Accrued contingent consideration		17,010		19,833
Other accrued expenses		29,899		18,150

	$	380,658	$	308,754

The net increase in accrued salaries and bonuses of $42.0 million, from $189.4 million at December 31, 2013 to $231.4 million at December 31, 2014, is primarily due to performance-based incentive compensation, principally to the Company’s physicians, accrued during the year ended December 31, 2014, partially offset by the payment of performance-based incentive compensation during the first quarter of 2014. A majority of the Company’s payments for performance-based incentive compensation is paid annually in the first quarter.