Acquisitions Acquisitions - Schedule of Purchase Price Allocation (Details) - Interboro Insurance Company $ in Thousands	Apr. 29, 2016 USD ($)
Business Acquisition
Cash and Cash Equivalents	$ 15,610
Investments	66,440
Premium and Agents' Receivable	2,004
Goodwill	12,131
Intangible assets	6,241
Insurance contract asset	8,366
Other assets	5,194
Loss Reserves	(24,967)
Unearned Premiums	(26,243)
Reinsurance Receivable	934
Deferred taxes	(352)
Other liabilities	(4,887)
Total purchase price	$ 60,471

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of investments in debt and equity securities, including, but not limited to, held-to-maturity, trading and available-for-sale expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount of deferred tax liability attributable to taxable temporary differences assumed at the acquisition date.

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.

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