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Consolidated Statements Of Changes In Stockholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified | Common Stock [Member] | Additional Paid-in Capital [Member] | Unallocated Common Stock Held by the Employee Stock Ownership Plan [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Income (Loss), Net of tax | Treasury Stock [Member] | Total
--- | --- | --- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2010 | $ 456 | $ 205,863 | $ (15,188) | $ 222,655 | $ 10,910 | $ (27,979) | $ 396,717
Beginning Balance, shares at Dec. 31, 2010 | 45,632,611 |  |  |  |  |  |
Comprehensive income: |  |  |  |  |  |  |
Net income |  |  |  | 16,823 |  |  | 16,823
Other comprehensive income, net of tax |  |  |  |  | 6,560 |  | 6,560
ESOP shares allocated or committed to be released |  | 206 | 618 |  |  |  | 824
Stock compensation expense |  | 3,047 |  |  |  |  | 3,047
Additional tax benefit on equity awards |  | 186 |  |  |  |  | 186
Exercise of stock options |  |  |  | (1) |  | 16 | 15
Cash dividends declared |  |  |  | (3,701) |  |  | (3,701)
Treasury stock |  |  |  |  |  | (37,821) | (37,821)
Ending Balance at Dec. 31, 2011 | 456 | 209,302 | (14,570) | 235,776 | 17,470 | (65,784) | 382,650
Beginning Balance, shares at Dec. 31, 2011 | 45,632,611 |  |  |  |  |  |
Comprehensive income: |  |  |  |  |  |  |
Net income |  |  |  | 16,031 |  |  | 16,031
Other comprehensive income, net of tax |  |  |  |  | 761 |  | 761
ESOP shares allocated or committed to be released |  | 273 | 605 |  |  |  | 878
Stock compensation expense |  | 3,029 |  |  |  |  | 3,029
Additional tax benefit on equity awards |  | 204 |  |  |  |  | 204
Common stock issued to complete merger | 13 | 17,445 |  |  |  |  | 17,458
Common stock issued to complete merger, shares | 1,271,675 |  |  |  |  |  |
Exercise of stock options |  |  |  | (193) |  | 121 | (72)
Exercise of stock options, shares |  |  |  |  |  |  | 59,876
Cash dividends declared |  |  |  | (1,722) |  |  | (1,722)
Treasury stock |  |  |  |  |  | (4,344) | (4,344)
Ending Balance at Dec. 31, 2012 | 469 | 230,253 | (13,965) | 249,892 | 18,231 | (70,007) | 414,873
Ending Balance, shares at Dec. 31, 2012 | 46,904,286 |  |  |  |  |  |
Comprehensive income: |  |  |  |  |  |  |
Net income |  |  |  | 19,147 |  |  | 19,147
Other comprehensive income, net of tax |  |  |  |  | (22,881) |  | (22,881)
ESOP shares allocated or committed to be released |  | 484 | 1,204 |  |  |  | 1,688
Stock compensation expense |  | 3,349 |  |  |  |  | 3,349
Additional tax benefit on equity awards |  | 296 |  |  |  |  | 296
Merger of Northfield Bancorp MHC | (246) | 370 |  |  |  |  | 124
Merger of Northfield Bancorp MHC, shares | (24,641,684) |  |  |  |  |  |
Exchanged of common stock | (169) | 169 |  |  |  |  | 0
Exchanged of common stock, shares | (16,845,135) |  |  |  |  |  |
Treasury stock retired | (54) | (69,953) |  |  |  | 70,007 | 0
Treasury stock retired, shares | (5,417,467) |  |  |  |  |  |
Proceeds of stock offering, net of costs | 568 | 329,396 |  |  |  |  | 329,964
Proceeds of stock offering, net of costs, shares | 56,777,462 |  |  |  |  |  |
Purchase of common stock by ESOP | 14 | 14,224 | (14,224) |  |  |  | 14
Purchase of common stock by ESOP, shares | 1,422,357 |  |  |  |  |  |
Exercise of stock options |  | 21 |  |  |  |  | 21
Exercise of stock options, shares | 26,507 |  |  |  |  |  | 26,507
Cash dividends declared |  |  |  | (26,859) |  |  | (26,859)
Treasury stock |  |  |  |  |  | (3,628) | (3,628)
Ending Balance at Dec. 31, 2013 | $ 582 | $ 508,609 | $ (26,985) | $ 242,180 | $ (4,650) | $ (3,628) | $ 716,108
Ending Balance, shares at Dec. 31, 2013 | 58,226,326 |  |  |  |  |  |

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