Mergers and Acquisitions (Tables)

12 Months Ended

Dec. 31, 2013

Business Combinations [Abstract]

Consideration transferred, identifiable net assets and resulting goodwill

	Wheatland		NCBI
(Dollars in thousands)	May 31, 2013		July 31, 2013	Total
Fair value of consideration transferred
Fair value of Company shares issued, net of equity issuance costs	$	28,290	16,743	45,033
Cash consideration for outstanding shares	11,025		13,833	24,858
Total fair value of consideration transferred	39,315		30,576	69,891
Recognized amounts of identifiable assets acquired and liabilities assumed
Identifiable assets acquired
Cash and cash equivalents	23,148		27,865	51,013
Investment securities, available-for-sale	75,643		48,058	123,701
Loans receivable	171,199		215,986	387,185
Core deposit intangible	2,079		3,660	5,739
Accrued income and other assets	15,063		24,262	39,325
Total identifiable assets acquired	287,132		319,831	606,963
Liabilities assumed
Deposits	255,197		294,980	550,177
FHLB advances and other borrowed funds	5,467		—	5,467
Accrued expenses and other liabilities	562		4,472	5,034
Total liabilities assumed	261,226		299,452	560,678
Total identifiable net assets	25,906		20,379	46,285
Goodwill recognized	$	13,409	10,197	23,606

Unaudited Pro Forma Summary of the Company as if the Acquisitions had Occurred at the Beginning of the Period

	Year ended
(Dollars in thousands)	December 31, 2013		December 31, 2012
Net interest income and non-interest income	$	339,236	334,317
Net income	96,392		80,403