SCHEDULE I - Parent Company Information - Condensed Statements of Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Condensed Financial Statements, Captions [Line Items]
Net income attributable to common shareholders	$ 14,069	$ 6,460	$ 7,180
Other comprehensive income (loss):
Currency translation adjustment	(868)	(796)
Derivative instruments
Unrealized losses on derivative instruments	69
Reclassification adjustment for losses (gains) included in net income			499
Tax benefit related to items of other comprehensive income (loss)	275	275	174
Other comprehensive income (loss)	(524)	(521)	(325)
Total comprehensive income	13,545	5,939	6,855
Parent Company
Condensed Financial Statements, Captions [Line Items]
Net income attributable to common shareholders	14,069	6,460	7,180
Other comprehensive income (loss):
Currency translation adjustment	(868)	(796)
Derivative instruments
Unrealized losses on derivative instruments	69
Reclassification adjustment for losses (gains) included in net income			(499)
Net loss recognized in other comprehensive income	(799)	(796)	(499)
Tax benefit related to items of other comprehensive income (loss)	275	275	174
Other comprehensive income (loss) from parent	(524)	(521)	(325)
Total comprehensive income	$ 13,545	$ 5,939	$ 6,855