Stock Based Compensation	6 Months Ended
Jun. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Based Compensation	Stock Based Compensation Long-Term Equity Incentive Plan Under the Assurant, Inc. Long-Term Equity Incentive Plan (“ALTEIP”), as amended and restated in May 2010, the Company is authorized to issue up to 5,300,000 new shares of the Company's common stock to employees, officers and non-employee directors. Under the ALTEIP, the Company may grant awards based on shares of its common stock, including stock options, stock appreciation rights (“SARs”), restricted stock (including performance shares), unrestricted stock, restricted stock units (“RSUs”), performance share units (“PSUs”) and dividend equivalents. All share-based grants are awarded under the ALTEIP. The Compensation Committee of the Board of Directors (the “Compensation Committee”) awards PSUs and RSUs annually. RSUs and PSUs are promises to issue actual shares of common stock at the end of a vesting period or performance period. The RSUs granted to employees under the ALTEIP are based on salary grade and performance and vest one-third each year over a three-year period. RSUs granted to non-employee directors also vest one-third each year over a three-year period, however, issuance of vested shares is deferred until separation from Board service. RSUs receive dividend equivalents in cash during the restricted period and do not have voting rights during the restricted period. PSUs accrue dividend equivalents during the performance period based on a target payout, and will be paid in cash at the end of the performance period based on the actual number of shares issued. The fair value of RSUs is estimated using the fair market value of a share of the Company’s common stock at the date of grant. The fair value of PSUs is estimated using the Monte Carlo simulation model and is described in further detail below. For the PSU portion of an award, the number of shares a participant will receive upon vesting is contingent upon the Company’s performance with respect to selected metrics, as identified below. The payout levels for 2016 awards can vary between 0% and 200% (maximum) of the target (100%) ALTEIP award amount and the payout levels for 2015 awards and prior can vary between 0% and 150% (maximum) of the target (100%) ALTEIP award amount, based on the Company’s level of performance against the selected metrics. 2016 PSU Performance Goals. The Compensation Committee established total shareholder return and net operating earnings per diluted share, excluding reportable catastrophe losses, as the two equally weighted performance measures for PSU awards in 2016. Total shareholder return is defined as appreciation in Company stock plus dividend yield to stockholders and will be measured by the performance of the Company relative to the S&P 500 Index over the three-year performance period. Net operating earnings per diluted share, excluding reportable catastrophe losses, is a Company-specific profitability metric and is defined as the Company’s net operating earnings, excluding reportable catastrophe losses, divided by the number of fully diluted shares outstanding at the end of the period. This metric is an absolute metric that is measured against a three-year cumulative target established by the Compensation Committee at the award date, and is not tied to the performance of peer companies. 2015 and prior PSU Performance Goals. The Compensation Committee established book value per share (“BVPS”) growth excluding AOCI, revenue growth and total stockholder return as the three performance measures for PSU awards in 2015 and prior. BVPS growth is defined as the year-over-year growth of the Company’s stockholders’ equity excluding AOCI divided by the number of fully diluted total shares outstanding at the end of the period. Revenue growth is defined as the year-over-year change in total revenues as disclosed in the Company’s annual statement of operations. Total stockholder return is defined as appreciation in Company stock plus dividend yield to stockholders. Payouts will be determined by measuring performance against the average performance of companies included in an insurance industry market index. From 2009 to 2013, the Company used the A.M. Best U.S. Insurance Index to measure its relative performance ranking. In 2014, A.M. Best stopped publishing this index. As of January 1, 2014, the Company is using the S&P Total Market Index to measure the Company’s performance for all outstanding PSU awards in 2015 and prior. Consistent with adjustments made to the A.M. Best U.S. Insurance Index, adjustments will be made to the S&P Total Market Index to exclude companies with revenues of less than $1,000,000 or that are not in the insurance or managed healthcare Global Industry Classification Standard codes. In addition, companies within the Company’s compensation peer group, but not otherwise in the S&P Total Market Index, will be included. The adjusted S&P Total Market Index is substantially similar in composition to the previous A.M. Best U.S. Insurance Index. Under the ALTEIP, the Company’s Chief Executive Officer (“CEO”) is authorized by the Board of Directors to grant common stock, restricted stock and RSUs to employees other than the executive officers of the Company (as defined in Section 16 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”)). The Compensation Committee reviews these grants semi-annually. Restricted stock and RSUs granted under this program may have different vesting periods. Restricted Stock Units RSUs granted to employees and to non-employee directors were 62,116 and 54,576 for the three months ended June 30, 2016 and 2015, respectively, and 310,094 and 339,398 for the six months ended June 30, 2016 and 2015, respectively. The compensation expense recorded related to RSUs was $5,429 and $5,951 for the three months ended June 30, 2016 and 2015, respectively, and $8,799 and $10,459 for the six months ended June 30, 2016 and 2015, respectively. The related total income tax benefit was $1,899 and $2,082 for the three months ended June 30, 2016 and 2015, respectively, and $3,076 and $3,660 for the six months ended June 30, 2016 and 2015, respectively. The weighted average grant date fair value for RSUs granted during the six months ended June 30, 2016 and 2015 was $78.28 and $62.22, respectively. As of June 30, 2016, there was $24,882 of unrecognized compensation cost related to outstanding RSUs. That cost is expected to be recognized over a weighted-average period of 1.51 years. The total fair value of RSUs vested during the three months ended June 30, 2016 and 2015 was $1,713 and $4,959, respectively, and $21,270 and $24,474 for the six months ended June 30, 2016 and 2015, respectively. Performance Share Units PSUs granted to employees were 10,182 for the three months ended June 30, 2016. No PSUs were granted to employees during the three months ended June 30, 2015. PSUs granted to employees were 258,646 and 355,688 for the six months ended June 30, 2016 and 2015, respectively. The compensation expense recorded related to PSUs was $1,387 and $1,266 for the three months ended June 30, 2016 and 2015, respectively, and $4,235 and $2,332 for the six months ended June 30, 2016 and 2015, respectively. The related total income tax benefit was $486 and $440 for the three months ended June 30, 2016 and 2015, respectively, and $1,478 and $813 for the six months ended June 30, 2016 and 2015, respectively. The weighted average grant date fair value for PSUs granted during the six months ended June 30, 2016 and 2015 was $80.82 and $61.82, respectively. As of June 30, 2016, there was $26,163 of unrecognized compensation cost related to outstanding PSUs. That cost is expected to be recognized over a weighted-average period of 1.18 years. The fair value of PSUs with market conditions was estimated on the date of grant using a Monte Carlo simulation model, which utilizes multiple variables that determine the probability of satisfying the market condition stipulated in the award. Expected volatilities for awards issued during the six months ended June 30, 2016 and 2015 were based on the historical stock prices of the Company’s stock and peer group. The expected term for grants issued during the six months ended June 30, 2016 and 2015 was assumed to equal the average of the vesting period of the PSUs. The risk-free rate was based on the U.S. Treasury yield curve in effect at the time of grant. Employee Stock Purchase Plan Under the Employee Stock Purchase Plan (“ESPP”), the Company is authorized to issue up to 5,000,000 new shares to employees who are participants in the ESPP. Eligible employees can purchase shares at a 10% discount applied to the lower of the closing price of the common stock on the first or last day of the offering period. In January 2016, the Company issued 59,102 shares at a discounted price of $61.70 for the offering period of July 1, 2015 through December 31, 2015. In January 2015, the Company issued 65,302 shares at a discounted price of $59.65 for the offering period of July 1, 2014 through December 31, 2014. In July 2016, the Company issued 45,649 shares at a discounted price of $70.67 for the offering period of January 1, 2016 through June 30, 2016. In July 2015, the Company issued 65,320 shares at a discounted price of $60.30 for the offering period of January 1, 2015 through June 30, 2015. The compensation expense recorded related to the ESPP was $320 and $316 for the three months ended June 30, 2016 and 2015, respectively, and $640 and $632 for the six months ended June 30, 2015 and 2016, respectively. The fair value of each award under the ESPP was estimated at the beginning of each offering period using the Black-Scholes option-pricing model. Expected volatilities are based on implied volatilities from traded options on the Company’s stock and the historical volatility of the Company’s stock. The risk-free rate for periods within the contractual life of the option is based on the U.S. Treasury yield curve in effect at the time of grant. The dividend yield is based on the current annualized dividend and share price as of the grant date.

Stock Based Compensation

Long-Term Equity Incentive Plan

Under the Assurant, Inc. Long-Term Equity Incentive Plan (“ALTEIP”), as amended and restated in May 2010, the Company is authorized to issue up to 5,300,000 new shares of the Company's common stock to employees, officers and non-employee directors. Under the ALTEIP, the Company may grant awards based on shares of its common stock, including stock options, stock appreciation rights (“SARs”), restricted stock (including performance shares), unrestricted stock, restricted stock units (“RSUs”), performance share units (“PSUs”) and dividend equivalents. All share-based grants are awarded under the ALTEIP.

The Compensation Committee of the Board of Directors (the “Compensation Committee”) awards PSUs and RSUs annually. RSUs and PSUs are promises to issue actual shares of common stock at the end of a vesting period or performance period. The RSUs granted to employees under the ALTEIP are based on salary grade and performance and vest one-third each year over a three-year period. RSUs granted to non-employee directors also vest one-third each year over a three-year period, however, issuance of vested shares is deferred until separation from Board service. RSUs receive dividend equivalents in cash during the restricted period and do not have voting rights during the restricted period. PSUs accrue dividend equivalents during the performance period based on a target payout, and will be paid in cash at the end of the performance period based on the actual number of shares issued. The fair value of RSUs is estimated using the fair market value of a share of the Company’s common stock at the date of grant. The fair value of PSUs is estimated using the Monte Carlo simulation model and is described in further detail below.

For the PSU portion of an award, the number of shares a participant will receive upon vesting is contingent upon the Company’s performance with respect to selected metrics, as identified below. The payout levels for 2016 awards can vary between 0% and 200% (maximum) of the target (100%) ALTEIP award amount and the payout levels for 2015 awards and prior can vary between 0% and 150% (maximum) of the target (100%) ALTEIP award amount, based on the Company’s level of performance against the selected metrics.

2016 PSU Performance Goals. The Compensation Committee established total shareholder return and net operating earnings per diluted share, excluding reportable catastrophe losses, as the two equally weighted performance measures for PSU awards in 2016. Total shareholder return is defined as appreciation in Company stock plus dividend yield to stockholders and will be measured by the performance of the Company relative to the S&P 500 Index over the three-year performance period. Net operating earnings per diluted share, excluding reportable catastrophe losses, is a Company-specific profitability metric and is defined as the Company’s net operating earnings, excluding reportable catastrophe losses, divided by the number of fully diluted shares outstanding at the end of the period. This metric is an absolute metric that is measured against a three-year cumulative target established by the Compensation Committee at the award date, and is not tied to the performance of peer companies.

2015 and prior PSU Performance Goals. The Compensation Committee established book value per share (“BVPS”) growth excluding AOCI, revenue growth and total stockholder return as the three performance measures for PSU awards in 2015 and prior. BVPS growth is defined as the year-over-year growth of the Company’s stockholders’ equity excluding AOCI divided by the number of fully diluted total shares outstanding at the end of the period. Revenue growth is defined as the year-over-year change in total revenues as disclosed in the Company’s annual statement of operations. Total stockholder return is defined as appreciation in Company stock plus dividend yield to stockholders. Payouts will be determined by measuring performance against the average performance of companies included in an insurance industry market index.

From 2009 to 2013, the Company used the A.M. Best U.S. Insurance Index to measure its relative performance ranking. In 2014, A.M. Best stopped publishing this index. As of January 1, 2014, the Company is using the S&P Total Market Index to measure the Company’s performance for all outstanding PSU awards in 2015 and prior. Consistent with adjustments made to the A.M. Best U.S. Insurance Index, adjustments will be made to the S&P Total Market Index to exclude companies with revenues of less than $1,000,000 or that are not in the insurance or managed healthcare Global Industry Classification Standard codes. In addition, companies within the Company’s compensation peer group, but not otherwise in the S&P Total Market Index, will be included. The adjusted S&P Total Market Index is substantially similar in composition to the previous A.M. Best U.S. Insurance Index.

Under the ALTEIP, the Company’s Chief Executive Officer (“CEO”) is authorized by the Board of Directors to grant common stock, restricted stock and RSUs to employees other than the executive officers of the Company (as defined in Section 16 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”)). The Compensation Committee reviews these grants semi-annually. Restricted stock and RSUs granted under this program may have different vesting periods.

Restricted Stock Units

RSUs granted to employees and to non-employee directors were 62,116 and 54,576 for the three months ended June 30, 2016 and 2015, respectively, and 310,094 and 339,398 for the six months ended June 30, 2016 and 2015, respectively. The compensation expense recorded related to RSUs was $5,429 and $5,951 for the three months ended June 30, 2016 and 2015, respectively, and $8,799 and $10,459 for the six months ended June 30, 2016 and 2015, respectively. The related total income tax benefit was $1,899 and $2,082 for the three months ended June 30, 2016 and 2015, respectively, and $3,076 and $3,660 for the six months ended June 30, 2016 and 2015, respectively. The weighted average grant date fair value for RSUs granted during the six months ended June 30, 2016 and 2015 was $78.28 and $62.22, respectively.

As of June 30, 2016, there was $24,882 of unrecognized compensation cost related to outstanding RSUs. That cost is expected to be recognized over a weighted-average period of 1.51 years. The total fair value of RSUs vested during the three months ended June 30, 2016 and 2015 was $1,713 and $4,959, respectively, and $21,270 and $24,474 for the six months ended June 30, 2016 and 2015, respectively.

Performance Share Units

PSUs granted to employees were 10,182 for the three months ended June 30, 2016. No PSUs were granted to employees during the three months ended June 30, 2015. PSUs granted to employees were 258,646 and 355,688 for the six months ended June 30, 2016 and 2015, respectively. The compensation expense recorded related to PSUs was $1,387 and $1,266 for the three months ended June 30, 2016 and 2015, respectively, and $4,235 and $2,332 for the six months ended June 30, 2016 and 2015, respectively. The related total income tax benefit was $486 and $440 for the three months ended June 30, 2016 and 2015, respectively, and $1,478 and $813 for the six months ended June 30, 2016 and 2015, respectively. The weighted average grant date fair value for PSUs granted during the six months ended June 30, 2016 and 2015 was $80.82 and $61.82, respectively.

As of June 30, 2016, there was $26,163 of unrecognized compensation cost related to outstanding PSUs. That cost is expected to be recognized over a weighted-average period of 1.18 years.

The fair value of PSUs with market conditions was estimated on the date of grant using a Monte Carlo simulation model, which utilizes multiple variables that determine the probability of satisfying the market condition stipulated in the award. Expected volatilities for awards issued during the six months ended June 30, 2016 and 2015 were based on the historical stock prices of the Company’s stock and peer group. The expected term for grants issued during the six months ended June 30, 2016 and 2015 was assumed to equal the average of the vesting period of the PSUs. The risk-free rate was based on the U.S. Treasury yield curve in effect at the time of grant.

Employee Stock Purchase Plan

Under the Employee Stock Purchase Plan (“ESPP”), the Company is authorized to issue up to 5,000,000 new shares to employees who are participants in the ESPP. Eligible employees can purchase shares at a 10% discount applied to the lower of the closing price of the common stock on the first or last day of the offering period.

In January 2016, the Company issued 59,102 shares at a discounted price of $61.70 for the offering period of July 1, 2015 through December 31, 2015. In January 2015, the Company issued 65,302 shares at a discounted price of $59.65 for the offering period of July 1, 2014 through December 31, 2014.

In July 2016, the Company issued 45,649 shares at a discounted price of $70.67 for the offering period of January 1, 2016 through June 30, 2016. In July 2015, the Company issued 65,320 shares at a discounted price of $60.30 for the offering period of January 1, 2015 through June 30, 2015.

The compensation expense recorded related to the ESPP was $320 and $316 for the three months ended June 30, 2016 and 2015, respectively, and $640 and $632 for the six months ended June 30, 2015 and 2016, respectively.

The fair value of each award under the ESPP was estimated at the beginning of each offering period using the Black-Scholes option-pricing model. Expected volatilities are based on implied volatilities from traded options on the Company’s stock and the historical volatility of the Company’s stock. The risk-free rate for periods within the contractual life of the option is based on the U.S. Treasury yield curve in effect at the time of grant. The dividend yield is based on the current annualized dividend and share price as of the grant date.