

4.	Reserves for Credit Losses

In general, the Company’s trade receivables provide for payment terms of 30 days or less. The Company does not extend revolving credit to its customers with respect to these receivables. The portfolio of receivables consists of a large group of smaller balance homogeneous amounts that are collectively evaluated for impairment. No customer makes up more than five percent of the outstanding receivables at March 31, 2014.

At March 31, 2014, approximately 96 percent of the outstanding balance of total trade accounts receivable was current and approximately 99 percent of the outstanding balance of total trade accounts receivable was less than 60 days past due. At March 31, 2013, approximately 96 percent of the outstanding balance of total trade accounts receivable was current and approximately 99 percent of the outstanding balance was less than 60 days past due.The outstanding balance is made up of receivables from a wide range of industries.

The following table presents changes in reserves for credit losses related to accounts receivable:



	Three months ended March 31,
	2014			2013
Balance, beginning of period	$	10,396		$	11,709
Provision for credit losses	9,090			3,756
Charge-offs	(8,107		)	(6,045		)
Recoveries of amounts previously charged-off	1,697			1,377
Currency translation	87			—
Balance, end of period	$	13,163		$	10,797