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Premiums Receivable (Tables) | 12 Months Ended
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Dec. 31, 2014
Insurance [Abstract] |
Components of Premiums Receivable | The balance is shown net of the allowance for doubtful accounts. The components of premiums receivable are shown below:
|  | December 31,
| 2014 |  | 2013
|  | (in thousands)
Premiums receivable |  | $ | 184,128 |  |  | $ | 177,037 |
Allowance for doubtful accounts |  |  | (5,211 | ) |  |  | (5,458 | )
Premiums receivable, net |  | $ | 178,917 |  |  | $ | 171,579 |
Summarizes the Activity in the Allowance for Doubtful Accounts | The following summarizes the activity in the allowance for doubtful accounts:
|  | December 31,
|  | 2014 |  | 2013 |  | 2012
|  | (in thousands)
Balance, beginning of year |  | $ | 5,458 |  |  | $ | 6,424 |  |  | $ | 5,573 |
Provision for bad debts (1) |  |  | 673 |  |  |  | 52 |  |  |  | 2,230 |
Write-offs |  |  | (920 | ) |  |  | (1,018 | ) |  |  | (1,379 | )
Balance, end of year |  | $ | 5,211 |  |  | $ | 5,458 |  |  | $ | 6,424 |
(1) Includes a one-time adjustment of $1.7 million in 2013 as a result of a change in accounting estimate of uncollectible accounts based on historical experience.

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- Definition Tabular disclosure of credit losses for current financing receivables (such as trade and accounts receivable), including a rollforward of the balance. An alternative caption includes allowance for doubtful accounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 + Details
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