Schedule of Deferred Tax Assets and Liabilities [Table Text Block] |
| | | | | | | | | | | | December 31, | | | 2015 | | 2014 | | | (in thousands) | Deferred tax assets: | | | Allowance for credit losses | | $ | 47,431 |
| | $ | 42,038 |
| Fair market value adjustment related to acquired loans | | 13,930 |
| | 8,250 |
| Stock-based compensation | | 12,069 |
| | 4,749 |
| Net operating loss carryovers | | 9,255 |
| | 8,453 |
| Tax credit carryovers | | 9,052 |
| | 9,617 |
| Startup costs and other amortization | | 4,771 |
| | 5,113 |
| Allowance for other assets acquired through foreclosure, net | | 4,280 |
| | 7,343 |
| Section 382 limited NUBILs | | 3,284 |
| | 3,657 |
| Other | | 13,686 |
| | 8,188 |
| Total gross deferred tax assets | | 117,758 |
| | 97,408 |
| Deferred tax asset valuation allowance | | — |
| | (2,290 | ) | Total deferred tax assets | | 117,758 |
| | 95,118 |
| Deferred tax liabilities: | | | | | Unrealized gain on debt instruments measured at fair value | | (7,537 | ) | | — |
| Deferred loan costs | | (7,400 | ) | | (6,041 | ) | Unrealized gain on AFS securities | | (6,353 | ) | | (9,949 | ) | Core deposit intangible | | (6,093 | ) | | (1,006 | ) | Premises and equipment | | (2,039 | ) | | (4,049 | ) | Unrealized gains on financial instruments measured at fair value | | (1,000 | ) | | (9,798 | ) | Other | | (984 | ) | | (1,589 | ) | Total deferred tax liabilities | | (31,406 | ) | | (32,432 | ) | Deferred tax assets, net | | $ | 86,352 |
| | $ | 62,686 |
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