| Schedule II-Valuation and Qualifying Accounts and Reserves |
Schedule II—Valuation and Qualifying Accounts and Reserves | | | | | | | | | | | | | | | | | | | | | | Descriptions | | Balance at
Beginning of
Period | | Additions
Charged to
Costs and
Expenses | | Acquisitions and
Other | | Deductions | | Balance at End
of Period | | | (in thousands) | ALLOWANCE FOR DOUBTFUL ACCOUNTS: | | | | | | | | | | | Year ended December 31, 2010 | | $ | 6,507 |
| | $ | 4,326 |
| | $ | 1,125 |
| | $ | (5,063 | ) | | $ | 6,895 |
| Year ended December 31, 2011 | | 6,895 |
| | 5,084 |
| | 2,199 |
| | (5,831 | ) | | 8,347 |
| Year ended December 31, 2012 | | 8,347 |
| | 5,928 |
| | 308 |
| | (5,113 | ) | | 9,470 |
| ALLOWANCE FOR ESTIMATED RETURNS, DISCOUNTS & ALLOWANCES: | | | | | | | | | | | Year ended December 31, 2010 | | $ | 15,802 |
| | $ | 541,314 |
| | $ | 1,061 |
| | $ | (539,992 | ) | | $ | 18,185 |
| Year ended December 31, 2011 | | 18,185 |
| | 668,936 |
| | 2,754 |
| | (667,071 | ) | | 22,804 |
| Year ended December 31, 2012 | | 22,804 |
| | 714,880 |
| | 1,151 |
| | (714,143 | ) | | 24,692 |
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