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Segment Information - Schedule of Operating Results by Segment (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Segment Reporting Information [Line Items] |  |  |
Other Noninterest Expense | $ 190,627 | $ 179,267 | $ 180,267
Net interest income (loss) | 238,086 | 227,632 | 225,044
Depreciation, Amortization and Accretion, Net | 8,396 | 7,347 | 7,243
(Recovery of) provision for loan losses | (5,101) | 4,990 | (7,333)
Other income | 78,731 | 77,551 | 75,549
Gain (Loss) on Sale of Investments | 0 | 0 | (1,158)
Other expense | 199,023 | 186,614 | 187,510
Income (loss) before taxes | 122,895 | 113,579 | 120,416
Income taxes (benefit) | 36,760 | 32,567 | 36,459
Net income | 86,135 | 81,012 | 83,957
Assets | 7,467,586 | 7,311,354 | 7,001,199
Loans | 5,271,857 | 5,068,085 | 4,829,682
Total deposits | 5,521,956 | 5,347,642 | 5,128,000
Totals For Reportable Segments [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Other Noninterest Expense | 180,896 | 169,295 | 172,267
Net interest income (loss) | 238,224 | 227,393 | 227,056
Depreciation, Amortization and Accretion, Net | 8,396 | 7,347 | 7,243
Income taxes (benefit) | 41,117 | 37,238 | 41,246
Assets | 7,447,148 | 7,299,098 | 6,994,456
Total deposits | 5,634,008 | 5,451,920 | 5,228,649
PNB |  |  |
Segment Reporting Information [Line Items] |  |  |
Net interest income (loss) | 227,576 | 220,879 | 218,641
(Recovery of) provision for loan losses | 2,611 | 7,665 | 3,517
Other income | 74,803 | 75,188 | 69,384
Other expense | 177,562 | 167,476 | 163,641
Income (loss) before taxes | 122,206 | 120,926 | 120,867
Income taxes (benefit) | 37,755 | 36,581 | 37,960
Net income | 84,451 | 84,345 | 82,907
Assets | 7,389,538 | 7,229,764 | 6,910,386
Loans | 5,234,828 | 5,029,072 | 4,781,761
Total deposits | 5,630,199 | 5,447,293 | 5,222,766
GFSC |  |  |
Segment Reporting Information [Line Items] |  |  |
Net interest income (loss) | 5,874 | 6,588 | 7,457
(Recovery of) provision for loan losses | 1,887 | 1,415 | 1,544
Other income | (1) | 2 | (1)
Other expense | 4,457 | 2,984 | 4,103
Income (loss) before taxes | (471) | 2,191 | 1,809
Income taxes (benefit) | (164) | 768 | 634
Net income | (307) | 1,423 | 1,175
Assets | 32,268 | 35,793 | 40,308
Loans | 32,661 | 35,469 | 40,645
Total deposits | 3,809 | 4,627 | 5,883
SEPH |  |  |
Segment Reporting Information [Line Items] |  |  |
Net interest income (loss) | 4,774 | (74) | 958
(Recovery of) provision for loan losses | (9,599) | (4,090) | (12,394)
Other income | 2,974 | 1,848 | 5,991
Other expense | 7,273 | 6,182 | 11,766
Income (loss) before taxes | 10,074 | (318) | 7,577
Income taxes (benefit) | 3,526 | (111) | 2,652
Net income | 6,548 | (207) | 4,925
Assets | 25,342 | 33,541 | 43,762
Loans | 12,354 | 15,153 | 23,956
Total deposits | 0 | 0 | 0
All Other |  |  |
Segment Reporting Information [Line Items] |  |  |
Net interest income (loss) | (138) | 239 | (2,012)
(Recovery of) provision for loan losses | 0 | 0 | 0
Other income | 955 | 513 | 175
Other expense | 9,731 | 9,972 | 8,000
Income (loss) before taxes | (8,914) | (9,220) | (9,837)
Income taxes (benefit) | (4,357) | (4,671) | (4,787)
Net income | (4,557) | (4,549) | (5,050)
Assets | 20,438 | 12,256 | 6,743
Loans | (7,986) | (11,609) | (16,680)
Total deposits | (112,052) | (104,278) | (100,649)
Intersegment Eliminations [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Other Noninterest Expense | 0 | 0 | 0
Net interest income (loss) | 2,164 | 2,561 | 3,708
Depreciation, Amortization and Accretion, Net | 0 | 0 | 0
Income taxes (benefit) | 0 | 0 | 0
Assets | (9,204) | (13,557) | (18,556)
Total deposits | (112,052) | (104,278) | (100,649)
Parent Co Gfsc Totals Not Eliminated [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Other Noninterest Expense | 9,731 | 9,972 | 8,000
Net interest income (loss) | (2,302) | (2,322) | (5,720)
Depreciation, Amortization and Accretion, Net | 0 | 0 | 0
Income taxes (benefit) | (4,357) | (4,671) | (4,787)
Assets | 29,642 | 25,813 | 25,299
Total deposits | $ 0 | $ 0 | $ 0

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