Earnings per share (Tables)

9 Months Ended

Sep. 30, 2014

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

		Three Months Ended				Nine Months Ended
		September 30,				September 30,
(Amounts in thousands, except share and per share amounts)		2014		2013		2014		2013
	Net income	$	17,692	$	13,824	$	49,764	$	41,125
	Weighted average shares outstanding – basic and diluted		5,111,201		5,109,717		5,110,435		5,108,832
	Net income per common share – basic and diluted	$	3.46	$	2.71	$	9.74	$	8.05