| In millions, except per share items | Dec-31-15 | Dec-31-14 | Dec-31-13 | Dec-31-12 | Dec-31-11 | Dec-31-10 | Dec-31-09 | Dec-31-08 |
| | 10-K | 10-K | 10-K | 10-K/A | 10-K | 10-K | 10-K/A | 10-K/A |
| Operating Activities | | | | | | | | |
| Net income | 6.9 | 150.5 | -1.5 | | -137.3 | -131.8 | | |
| |
| Adjustments to reconcile net income to cash from (used in) operating activities: | | | | | | | | |
| Depreciation and amortization of premises and equipment | 3.6 | 3.8 | 3.6 | | 3.3 | 3.6 | | |
| Recovery of loan losses | -3.0 | -5.4 | 0.5 | | 67.4 | 132.8 | | |
| Deferred income taxes | 7.1 | -142.5 | 1.3 | | 0.6 | | | |
| Deferred loan fees and costs, net | -0.5 | 0.3 | -0.3 | | -0.8 | -0.8 | | |
| Premium amortization and discount accretion of investment securities, net | 2.8 | 2.3 | 4.1 | | 3.9 | -3.8 | | |
| Stock compensation expense | 2.5 | 0.9 | 0.7 | | 0.0 | 0.1 | | |
| Increase in cash surrender value of bank-owned life insurance, net | -0.9 | -1.1 | -1.1 | | -1.1 | -1.1 | | |
| Origination of loans held for sale | -100.3 | -59.5 | -114.1 | | | -118.3 | | |
| Net proceeds from sale of loans held for sale | 98.5 | 59.1 | 121.1 | | 18.0 | 128.4 | | |
| Net gain on sale of loans held for sale | -0.8 | -0.6 | -1.8 | | | | | |
| Mortgage servicing rights capitalized | -1.1 | -0.6 | -1.1 | | | | | |
| Net gain on sale of premises and equipment | -0.5 | 0.1 | 0.5 | | 0.0 | | | |
| Net loss on sales and write-downs of other real estate owned | 1.8 | 0.8 | 3.9 | | 44.2 | 9.9 | | |
| Changes in assets and liabilities: | | | | | | | | |
| Decrease (Increase) in accrued interest receivable and other assets | -6.4 | 2.4 | -0.3 | | 20.8 | 5.2 | | |
| Net cash provided by (used in) operating activities | -0.6 | 0.8 | -4.5 | | 53.7 | 32.2 | | |
| |
| Investing Activities | | | | | | | | |
| Available-for-sale securities: | | | | | | | | |
| Proceeds from maturities, calls and principal repayments | 57.3 | 53.9 | 75.7 | | 77.5 | 106.9 | | |
| Purchases | -89.1 | | -127.8 | | -302.8 | -291.3 | | |
| Held-to-maturity securities: | | | | | | | | |
| Proceeds from maturities, calls and principal repayments | 57.3 | 53.9 | 75.7 | | 77.5 | 106.9 | | |
| Payments to Acquire Held-to-maturity Securities | -20.4 | | -155.4 | | | | | |
| Net increase in loans held for investment | -185.0 | -139.7 | -28.8 | | 179.9 | 91.2 | | |
| Purchases of premises and equipment | -2.3 | -2.0 | -3.3 | | -2.7 | -0.8 | | |
| Proceeds from sales of premises and equipment | 2.0 | 0.3 | 0.9 | | 0.3 | | | |
| Net cash provided by (used in) investing activities | -174.1 | -40.1 | -23.1 | | 427.5 | 164.1 | | |
| |
| Financing Activities | | | | | | | | |
| Net cash provided by (used in) financing activities | 117.9 | 67.8 | -144.6 | | -88.4 | -63.4 | | |
| Net Increase (Decrease) in Cash and Cash Equivalents | -56.7 | 28.5 | -172.2 | | 392.8 | 132.9 | | |
| Cash and Cash Equivalents at Beginning of Period | 95.9 | 31.9 | 239.6 | | 160.6 | 27.6 | | |
| Cash and Cash Equivalents at End of Period | 39.2 | 95.9 | 31.9 | | 553.4 | 160.6 | | |
| |
| Supplemental disclosure of cash flow information | | | | | | | | |
| Cash paid during the period for: | | | | | | | | |
| Interest | 13.4 | 9.1 | 10.1 | | 24.2 | 30.5 | | |
| Income taxes, net of refunds | 0.0 | | 0.1 | | | 0.6 | | |
| Noncash transactions: | | | | | | | | |
| Foreclosed loans transferred to other real estate owned | 4.5 | 4.4 | 15.0 | | 132.5 | 47.8 | | |
| Unrealized securities gains (losses), net of income taxes | -2.2 | 11.5 | -18.1 | | 0.8 | -3.4 | | |
| Transfer of fixed assets to other assets | 1.3 | 2.1 | | | | | | |
| Unrealized loss on interest rate swaps, net of income taxes | | | | | | | | |
| Assets acquired in branch purchase | | | | | | | | |
| Liabilities assumed in branch purchase | | | | | | | | |