COLUMN A

COLUMN B

COLUMN C

COLUMN D

COLUMN E

Additions

Balance at
Beginning of
Period

Charged to
Cost and
Expense

Charged
to Other
Accounts

Acquisitions
and
Divestitures

Charge-offs,
Net of
Recoveries

Balance at
End of
Period

Year ended December 31, 2012

Allowance deducted from assets to which they apply:

Allowance for doubtful accounts

$

9,220

$

5,336

$

—

$

—

$

(2,737

)

$

11,819

Year ended December 31, 2011

Allowance deducted from assets to which they apply:

Allowance for doubtful accounts

$

10,620

$

6,494

$

—

$

—

$

(7,894

)

$

9,220

Year ended December 31, 2010

Allowance deducted from assets to which they apply:

Allowance for doubtful accounts

$

8,455

$

4,717

$

—

$

—

$

(2,552

)

$

10,620