SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS AND RESERVES (IN THOUSANDS) | | | | | | | | | | | | | | | | | | | | | | For the Year Ended December 31, 2013 | | Balance at beginning of period | | Additions (deductions) charged to costs and expenses | | Accounts written off | | Translation adjustments | | Balance at end of period | Allowance for doubtful accounts(1) | $ | 9,293 |
| | $ | 1,984 |
| | $ | (1,059 | ) | | $ | 275 |
| | $ | 10,493 |
| Valuation allowance on credit and operating loss carryforwards and other net deferred tax assets | 450,733 |
| | 38,360 |
| (2) | — |
| | 14,897 |
| | 503,990 |
| | | | | | | | | | | | For the Year Ended December 31, 2012 | | Balance at beginning of period | | Additions (deductions) charged to costs and expenses | | Accounts written off | | Translation adjustments | | Balance at end of period | Allowance for doubtful accounts(1) | $ | 5,831 |
| | $ | 3,639 |
| | $ | (824 | ) | | $ | 647 |
| | $ | 9,293 |
| Valuation allowance on credit and operating loss carryforwards and other net deferred tax assets | 290,879 |
| | 153,718 |
| (3) | — |
| | 6,136 |
| | 450,733 |
| | | | | | | | | | | | For the Year Ended December 31, 2011 | | Balance at beginning of period | | Additions (deductions) charged to costs and expenses | | Accounts written off | | Translation adjustments | | Balance at end of period | Allowance for doubtful accounts(1) | $ | 8,470 |
| | $ | (518 | ) | | $ | (1,219 | ) | | $ | (902 | ) | | $ | 5,831 |
| Valuation allowance on credit and operating loss carryforwards and other net deferred tax assets | 288,182 |
| | 8,743 |
| | — |
| | (6,046 | ) | | 290,879 |
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_______________________ (1) Amounts have been revised to properly reflect a $2.1 million prior period adjustment. (2) The 2013 amount includes a revision to the 2012 foreign net operating loss carryforwards in the amount of $30 million, as discussed in Note 9 of the Consolidated Financial Statements. (3) The 2012 amount includes a revision to the 2011 foreign net operating loss carryforwards in the amount of $74 million, as discussed in Note 9 of the Consolidated Financial Statements.
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