XML 136 R120.htm IDEA: XBRL DOCUMENT v3.8.0.1
Quarterly Results of Operations (Unaudited) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Quarterly Results Of Operations Details                              
Total interest income $ 86,526 $ 82,370 $ 79,344 $ 75,794 $ 75,795 $ 72,431 $ 69,772 $ 67,807 $ 67,311 $ 63,981 $ 62,423 $ 59,465 $ 324,034 $ 285,805 $ 253,180
Total interest expense 11,167 10,434 9,646 8,900 8,771 7,703 5,950 5,216 4,735 4,896 4,873 4,734 40,147 27,640 19,238
Net interest income 75,359 71,936 69,698 66,894 67,024 64,728 63,822 62,591 62,576 59,085 57,550 54,731 283,887 258,165 233,942
Provision for credit losses 4,087 1,921 1,566 1,397 2,112 2,288 3,888 3,043 4,595 3,262 3,471 3,310      
Net interest income after provision for credit losses 71,272 70,015 68,132 65,497 64,912 62,440 59,934 59,548 57,981 55,823 54,079 51,421 274,916 246,834 219,304
Noninterest income 9,496 6,784 7,023 6,070 7,014 6,405 7,575 6,290 6,492 6,099 6,233 7,804 29,372 27,284 26,628
Noninterest expense 29,803 29,516 30,001 29,232 29,780 28,838 28,295 28,103 28,640 27,405 26,598 28,073 118,552 115,016 110,716
Income before income tax expense 50,965 47,283 45,154 42,335 42,146 40,007 39,214 37,735 35,833 34,517 33,714 31,152 185,736 159,102 135,216
Income Tax Expense 35,396 17,409 17,382 15,318 16,429 15,484 15,069 14,413 13,485 13,054 12,776 11,734 85,504 61,395 51,049
Net Income 15,569 29,874 27,772 27,017 25,717 24,523 24,145 23,322 22,348 21,463 20,938 19,418 100,232 97,707 84,167
Preferred Stock Dividends                   180 179 180     601
Net income available to common shareholders $ 15,569 $ 29,874 $ 27,772 $ 27,017 $ 25,717 $ 24,523 $ 24,145 $ 23,322 $ 22,286 $ 21,283 $ 20,759 $ 19,238 $ 100,232 $ 97,707 $ 83,566
Earnings Per Common Share                              
Basic (in dollars per share) $ 0.46 [1] $ 0.87 [1] $ 0.81 [1] $ 0.79 [1] $ 0.76 [1] $ 0.73 [1] $ 0.72 [1] $ 0.70 [1] $ 0.67 [1] $ 0.64 [1] $ 0.62 [1] $ 0.62 [1] $ 2.94 $ 2.91 $ 2.54
Diluted (in dollars per share) $ 0.45 [1] $ 0.87 [1] $ 0.81 [1] $ 0.79 [1] $ 0.75 [1] $ 0.72 [1] $ 0.71 [1] $ 0.68 [1] $ 0.65 [1] $ 0.63 [1] $ 0.61 [1] $ 0.61 [1] $ 2.92 $ 2.86 $ 2.50
[1] Earnings per common share are calculated on a quarterly basis and may not be additive to the year to date amount.