CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock [Member]	Paid-in Capital [Member]	Retained Earnings (Accumulated Deficit) [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance at Dec. 31, 2013	$ 198,604	$ 2,364	$ 277,290	$ (70,695)	$ (11)	$ (10,344)
Beginning Balance (in shares) at Dec. 31, 2013		23,638
Comprehensive income	11,213	$ 0	0	5,696	0	5,517
Stock based compensation expense	1,299	0	1,299	0	0	0
Common stock issued for stock based employee benefit plans	112	$ 1	171	0	(60)	0
Common stock issued for stock based employee benefit plans (in shares)		147
Issuance of common stock, net of related expense	24,637	$ 233	24,404	0	0	0
Issuance of common stock, net of related expense (in shares)		2,326
Issuance of common stock, pursuant to acquisition	76,787	$ 702	76,085	0	0	0
Issuance of common stock, pursuant to acquisition (in shares)		7,026
Other	0	$ 0	0	(1)	0	0
Ending Balance at Dec. 31, 2014	312,651	$ 3,300	379,249	(65,000)	(71)	(4,827)
Ending Balance (in shares) at Dec. 31, 2014		33,137
Comprehensive income	20,755	$ 0	0	22,141	0	(1,386)
Stock based compensation expense	2,859	0	2,859	0	0	0
Common stock issued for stock based employee benefit plans	15	$ 0	17	0	(2)	0
Common stock issued for stock based employee benefit plans (in shares)		124
Issuance of common stock, pursuant to acquisition	17,172	$ 109	17,063	0	0	0
Issuance of common stock, pursuant to acquisition (in shares)		1,090
Other	1	$ 26	(26)	1	0	0
Ending Balance at Dec. 31, 2015	353,453	$ 3,435	399,162	(42,858)	(73)	(6,213)
Ending Balance (in shares) at Dec. 31, 2015		34,351
Comprehensive income	27,902	$ 0	0	29,202	0	(1,300)
Stock based compensation expense	4,154	0	4,154	0	0	0
Common stock issued for stock based employee benefit plans	(1,161)	$ 0	2	0	(1,163)	0
Common stock issued for stock based employee benefit plans (in shares)		87
Common stock issued for stock options	134	$ 1	133	0	0	0
Options, Exercised		12
Issuance of common stock, pursuant to acquisition	50,913	$ 329	50,584	0	0	0
Issuance of common stock, pursuant to acquisition (in shares)		3,291
Other	2	$ 37	(34)	(1)	0	0
Other (in shares)		281
Ending Balance at Dec. 31, 2016	$ 435,397	$ 3,802	$ 454,001	$ (13,657)	$ (1,236)	$ (7,513)
Ending Balance (in shares) at Dec. 31, 2016		38,022