CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Cash Flows from Operating Activities
Net income	$ 9,936	$ 8,185	$ 17,697	$ 16,072
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based and non-cash compensation			592	479
Depreciation			2,825	2,812
Amortization of intangible assets	808	733	1,577	1,480
Provision for loan losses			500	2,000
Provision for deferred income taxes			(767)	7,415
Amortization of security premiums and discounts, net			4,238	3,697
Accretion of premiums and discounts on loans, net			(603)
Net security losses (gains)	22	3	21	(40)
Gain on sales of loans	(1,868)	(1,234)	(3,294)	(2,215)
Net (gain) on disposition of premises and equipment			(6)	(7)
Premises and equipment impairment			670
Increase in cash surrender value of bank owned life Insurance			(732)	(78)
Change in assets and liabilities:
Decrease (increase) in other assets			894	(9)
Decrease in other liabilities			(2,265)	(3,943)
Decrease in interest payable			(79)	(107)
Decrease (increase) in income taxes receivable			3,412	(1,505)
Net cash provided by operating activities before activities for loans originated for sale			24,680	26,051
Loans originated for sale			(160,203)	(107,686)
Proceeds from sales of loans			151,829	103,455
Net cash provided by operating activities			16,306	21,820
Cash Flows from Investing Activities
Proceeds from sales of securities classified available for sale			11,781	62,245
Proceeds from maturities of securities classified available for sale			114,842	105,049
Proceeds from maturities of securities classified held to maturity			6	3
Purchase of securities classified available for sale			(181,084)	(164,707)
Purchase of securities classified held to maturity			(1,643)	(1,026)
Net decrease(increase) in loans			19,968	(25,070)
Proceeds from disposition of premises and equipment			15	7
Proceeds from sale of other real estate owned ("OREO") properties			600	1,252	$ 2,739
Purchases of premises and equipment			(2,331)	(1,548)
Net cash received in acquisitions			12,114
Net cash used in investing activities			(25,732)	(23,795)
Cash Flows from Financing Activities
Net decrease in certificates of deposit			(44,301)	(44,246)
Net increase in demand, money market and savings deposits			37,292	36,636
Cash dividends paid			(9,050)	(8,176)
Value of shares surrendered upon vesting of restricted stock units to cover tax obligations			(27)	(25)
Net decrease in securities sold under agreements to repurchase			(24,541)	(31,785)
Net cash used in financing activities			(40,627)	(47,596)
Net decrease in cash and due from banks			(50,053)	(49,571)
Cash and due from banks, beginning			339,438	231,603	231,603
Cash and due from banks, ending	$ 289,385	$ 182,032	289,385	182,032	339,438
Cash Payments for:
Interest			3,197	3,436
Income taxes			5,770	2,563
Non-cash investing and financing activities:
Other real estate acquired in settlement of loans			$ 324	$ 609	$ 660