v3.8.0.1
Parent Only Financial Statements - Statements of Cash Flow (Details) - USD ($)
$ 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
Cash Flows from Operating Activities:                              
Net income $ 2,273 $ 9,580 $ 9,616 $ 6,113 $ 6,517 $ 9,675 $ 3,324 $ 3,787 $ 5,048 $ 2,762 $ 2,942 $ 2,626 $ 27,582 $ 23,303 $ 13,378
Adjustments to reconcile net income to net cash provided by operating activities:                              
Stock–based compensation expense                         1,838 899 613
Deferred tax expense                         4,511 1,337 (1,866)
Increase in other assets                         (1,541) (2,089) (3,655)
Increase (decrease) in accounts payable and other liabilities                         7,106 (323) 4,741
Net cash provided by operating activities                         37,872 19,770 13,869
Cash Flows from Investing Activities:                              
Purchase of premises and equipment                         (2,235) (5,935) (1,753)
Net cash used in investing activities                         (568,981) (1,000,458) (916,471)
Cash Flows from Financing Activities:                              
Proceeds from the sale of stock, net                         28,386 4,267 136,163
Net cash provided by financing activities                         53,557 1,362,886 1,088,658
Increase (decrease) in cash and cash equivalents                         (477,552) 382,198 186,056
Cash and cash equivalents at beginning of year       597,946       215,748       29,692 597,946 215,748 29,692
Cash and cash equivalents at end of year 120,394       597,946       215,748       120,394 597,946 215,748
FFI                              
Cash Flows from Operating Activities:                              
Net income                         27,582 23,303 13,378
Adjustments to reconcile net income to net cash provided by operating activities:                              
Earnings from investment in subsidiaries                         (31,547) (25,498) (15,801)
Stock–based compensation expense                         61 78 113
Deferred tax expense                         (37) 296 (345)
Increase in other assets                         (29) (1,464) (602)
Increase (decrease) in accounts payable and other liabilities                         3,161 (1,102) 1,926
Net cash provided by operating activities                         (809) (4,387) (1,331)
Cash Flows from Investing Activities:                              
Investment in subsidiaries                         (72,845) (40,000) (76,453)
Payment to shareholders of acquired companies                             (543)
Dividend from subsidiary                         2,000 5,000  
Purchase of premises and equipment                           (24) (12)
Net cash used in investing activities                         (70,845) (35,024) (77,008)
Cash Flows from Financing Activities:                              
Proceeds from borrowings                         50,000   10,114
Paydowns of borrowings                             (30,000)
Proceeds from the sale of stock, net                         28,386 4,267 136,163
Intercompany accounts, net decrease (increase)                         (386) (689) (1,509)
Net cash provided by financing activities                         78,000 3,578 114,768
Increase (decrease) in cash and cash equivalents                         6,346 (35,833) 36,429
Cash and cash equivalents at beginning of year       $ 6,318       $ 42,151       $ 5,722 6,318 42,151 5,722
Cash and cash equivalents at end of year $ 12,664       $ 6,318       $ 42,151       $ 12,664 $ 6,318 $ 42,151