Accounts payable and accrued expenses (Tables)

6 Months Ended

Jun. 30, 2012

Payables and Accruals [Abstract]

Components of accounts payable and accrued expenses

Accounts payable and accrued expenses are as follows:

	June 30, 2012		December 31, 2011
Outstanding checks in excess of cash	$	19,329	17,590
Accounts payable, trade	381,503		372,616
Accrued expenses	169,554		154,560
Product warranties	34,867		30,144
Accrued interest	26,900		34,235
Deferred tax liability	7,320		8,760
Accrued compensation and benefits	93,938		97,186
Total accounts payable and accrued expenses	$	733,411	715,091