Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common stock	Accumulated deficit	Accumulated other comprehensive income (loss)
Beginning balance (In shares) at Dec. 31, 2013		47,592,061
Beginning balance at Dec. 31, 2013	$ 188,715	$ 330,839	$ (142,088)	$ (36)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	6,608		3,737	2,871
Issuance of common stock, net (In shares)		24,454,170
Issuance of common stock, net	119,285	$ 119,285
Restricted stock grants, net (In shares)		445,619
Stock-based compensation expense	1,214	$ 1,214
Tax effect on nonvested restricted stock	(339)	$ (339)
Ending balance (In shares) at Dec. 31, 2014		72,491,850
Ending balance at Dec. 31, 2014	315,483	$ 450,999	(138,351)	2,835
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	19,365		20,579	(1,214)
Issuance of common stock, net (In shares)		207,266
Issuance of common stock, net	0	$ 0
Restricted stock grants, net (In shares)		93,454
Stock-based compensation expense	2,482	$ 2,482
Tax effect on nonvested restricted stock	(556)	$ (556)
Ending balance (In shares) at Dec. 31, 2015		72,792,570
Ending balance at Dec. 31, 2015	336,774	$ 452,925	(117,772)	1,621
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	14,085		16,771	(2,686)
Issuance of common stock, net (In shares)		3,171,940
Issuance of common stock, net	16,246	$ 16,246
Restricted stock grants, net (In shares)		297,674
Stock-based compensation expense	3,124	$ 3,124
Tax effect on nonvested restricted stock	(577)	$ (577)
Ending balance (In shares) at Dec. 31, 2016		76,262,184
Ending balance at Dec. 31, 2016	$ 369,652	$ 471,718	$ (101,001)	$ (1,065)