Income Taxes - Tax Effects of Temporary Differences Related to Deferred Taxes Included in Other Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Deferred tax assets:
Loans acquired	$ 17,480	$ 12,536
Allowance for loan losses	15,744	13,947
Valuation of foreclosed assets	2,706	1,474
Tax NOLs from acquisition	19,159	7,242
Deferred compensation payable	2,492	2,707
Accrued equity and other compensation	7,494	8,182
Acquired securities	2,598	397
Unrealized loss on available-for-sale securities	0	9,196
Other	6,916	7,042
Gross deferred tax assets	74,589	62,723
Deferred tax liabilities:
Goodwill and other intangible amortization	(34,590)	(30,471)
Accumulated depreciation	(12,871)	(13,361)
Unrealized gain on available-for-sale securities	(4,150)	0
Other	(5,447)	(5,360)
Gross deferred tax liabilities	(57,058)	(49,192)
Net deferred tax asset, included in other assets	$ 17,531	$ 13,531