Stock-Based Compensation	3 Months Ended
Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock–Based Compensation Valley currently has one active employee stock option plan, the 2016 Long-Term Stock Incentive Plan (the “2016 Stock Plan”), adopted by Valley’s Board of Directors on January 29, 2016 and approved by its shareholders on April 28, 2016. The purpose of the 2016 Plan is to provide additional incentive to officers and key employees of Valley and its subsidiaries, whose substantial contributions are essential to the continued growth and success of Valley, and to attract and retain competent and dedicated officers and other key employees whose efforts will result in the continued and long-term growth of Valley’s business. Under the 2016 Stock Plan, Valley may award shares of common stock in the form of stock appreciation rights, both incentive and non-qualified stock options, restricted stock and restricted stock units (RSUs) to its employees and non-employee directors. As of March 31, 2018, 5.6 million shares of common stock were available for issuance under the 2016 Stock Plan. The essential features of each award are described in the award agreement relating to that award. The grant, exercise, vesting, settlement or payment of an award may be based upon the fair value of Valley’s common stock on the last sale price reported for Valley’s common stock on such date or the last sale price reported preceding such date, except for performance-based awards with a market condition. The grant date fair values of performance-based awards that vest based on a market condition are determined by a third party specialist using a Monte Carlo valuation model. In connection with USAB acquisition on January 1, 2018, Valley assumed pre-existing stock awards consisting of options for 1.8 million shares of Valley common stock (of which options for 1.2 million shares remained outstanding as of March 31, 2018) at a weighted average exercise price of $4.97 and 336 thousand time-based RSUs (of which 199 thousand remained outstanding as of March 31, 2018). The stock plan under which the stock awards were issued is no longer active. Restricted Stock. Restricted stock is awarded to key employees, providing for the immediate award of our common stock subject to certain vesting and restrictions under the 2016 Stock Plan. Compensation expense is measured based on the grant-date fair value of the shares. Valley awarded time-based restricted stock totaling 1.1 million shares and 393 thousand shares during the three months ended March 31, 2018 and 2017, respectively, to both executive officers and key employees of Valley. The majority of the awards have vesting periods of three years. Generally, the restrictions on such awards lapse at an annual rate of one-third of the total award commencing with the first anniversary of the date of grant. The average grant date fair value of the restricted stock awards granted during the three months ended March 31, 2018 and 2017 was $11.81 per share and $11.66 per share, respectively. Restricted Stock Units (RSUs). Valley granted 450 thousand and 371 thousand of performance-based RSUs to certain executive officers for the three months ended March 31, 2018 and 2017, respectively. The performance-based RSUs will vest and be issued as common stock based on the attainment of (i) growth in tangible book value per share plus dividends (75 percent of the RSU award) and (ii) total shareholder return as compared to our peer group (25 percent of the RSU award). The RSUs "cliff" vest after three years based on the cumulative performance of Valley during that time period. The RSUs earn dividend equivalents (equal to cash dividends paid on Valley's common stock) over the applicable performance period. Dividend equivalents and accrued interest (if applicable), per the terms of the agreements, are accumulated and paid to the grantee at the vesting date, or forfeited if the performance conditions are not met. The grant date fair value of the RSUs granted during the three months ended March 31, 2018 and 2017 was $12.35 per share and $11.05 per share, respectively. Valley recorded total stock-based compensation expense of $8.0 million and $4.1 million for the three months ended March 31, 2018 and 2017. The fair values of stock awards are expensed over the shorter of the vesting or required service period. As of March 31, 2018, the unrecognized amortization expense for all stock-based employee compensation totaled approximately $27.5 million and will be recognized over an average remaining vesting period of 2.4 years.

Stock–Based Compensation

Valley currently has one active employee stock option plan, the 2016 Long-Term Stock Incentive Plan (the “2016 Stock Plan”), adopted by Valley’s Board of Directors on January 29, 2016 and approved by its shareholders on April 28, 2016. The purpose of the 2016 Plan is to provide additional incentive to officers and key employees of Valley and its subsidiaries, whose substantial contributions are essential to the continued growth and success of Valley, and to attract and retain competent and dedicated officers and other key employees whose efforts will result in the continued and long-term growth of Valley’s business.

Under the 2016 Stock Plan, Valley may award shares of common stock in the form of stock appreciation rights, both incentive and non-qualified stock options, restricted stock and restricted stock units (RSUs) to its employees and non-employee directors. As of March 31, 2018, 5.6 million shares of common stock were available for issuance under the 2016 Stock Plan. The essential features of each award are described in the award agreement relating to that award. The grant, exercise, vesting, settlement or payment of an award may be based upon the fair value of Valley’s common stock on the last sale price reported for Valley’s common stock on such date or the last sale price reported preceding such date, except for performance-based awards with a market condition. The grant date fair values of performance-based awards that vest based on a market condition are determined by a third party specialist using a Monte Carlo valuation model.

In connection with USAB acquisition on January 1, 2018, Valley assumed pre-existing stock awards consisting of options for 1.8 million shares of Valley common stock (of which options for 1.2 million shares remained outstanding as of March 31, 2018) at a weighted average exercise price of $4.97 and 336 thousand time-based RSUs (of which 199 thousand remained outstanding as of March 31, 2018). The stock plan under which the stock awards were issued is no longer active.

Restricted Stock. Restricted stock is awarded to key employees, providing for the immediate award of our common stock subject to certain vesting and restrictions under the 2016 Stock Plan. Compensation expense is measured based on the grant-date fair value of the shares. Valley awarded time-based restricted stock totaling 1.1 million shares and 393 thousand shares during the three months ended March 31, 2018 and 2017, respectively, to both executive officers and key employees of Valley. The majority of the awards have vesting periods of three years. Generally, the restrictions on such awards lapse at an annual rate of one-third of the total award commencing with the first anniversary of the date of grant. The average grant date fair value of the restricted stock awards granted during the three months ended March 31, 2018 and 2017 was $11.81 per share and $11.66 per share, respectively.

Restricted Stock Units (RSUs). Valley granted 450 thousand and 371 thousand of performance-based RSUs to certain executive officers for the three months ended March 31, 2018 and 2017, respectively. The performance-based RSUs will vest and be issued as common stock based on the attainment of (i) growth in tangible book value per share plus dividends (75 percent of the RSU award) and (ii) total shareholder return as compared to our peer group (25 percent of the RSU award). The RSUs "cliff" vest after three years based on the cumulative performance of Valley during that time period. The RSUs earn dividend equivalents (equal to cash dividends paid on Valley's common stock) over the applicable performance period. Dividend equivalents and accrued interest (if applicable), per the terms of the agreements, are accumulated and paid to the grantee at the vesting date, or forfeited if the performance conditions are not met. The grant date fair value of the RSUs granted during the three months ended March 31, 2018 and 2017 was $12.35 per share and $11.05 per share, respectively.

Valley recorded total stock-based compensation expense of $8.0 million and $4.1 million for the three months ended March 31, 2018 and 2017. The fair values of stock awards are expensed over the shorter of the vesting or required service period. As of March 31, 2018, the unrecognized amortization expense for all stock-based employee compensation totaled approximately $27.5 million and will be recognized over an average remaining vesting period of 2.4 years.